本(ben)發明涉(she)及(ji)電子技術(shu)領域(yu)，特(te)別涉(she)及(ji)一(yi)種線性(xing)調整(zheng)器。

背景技術：

線性調整(zheng)器也稱串聯調整(zheng)器，通過它(ta)可以(yi)將不穩定(ding)的輸入電(dian)壓轉換為(wei)(wei)可調節的直流輸出電(dian)壓，以(yi)便于作(zuo)為(wei)(wei)其它(ta)系統的供電(dian)電(dian)源。由于線性調整(zheng)器具有結構簡單、靜態(tai)功耗(hao)小、輸出電(dian)壓紋波小等特(te)點，因此線性調整(zheng)器常被用于移動(dong)消費類電(dian)子(zi)設備芯片(pian)的片(pian)內電(dian)源管理。

圖1給出了現有技術中的線性(xing)調整器(qi)的結構示意圖：線性(xing)調整器(qi)包括：偏置模塊1、基(ji)準電(dian)壓模塊2、誤差放大器(qi)3、功率調整管4以及采樣(yang)電(dian)阻網絡(luo)5。

線性調整器的輸入電壓V_IN分別輸入至偏置模塊1、基準電壓模塊2以及功率調整管4中，偏置模塊1為基準電壓模塊2以及誤差放大器3提供正常工作所需的電流偏置和電壓偏置，基準電壓模塊2產生一個低溫漂的參考電壓V_REF給誤差放大器3，誤差放大器3將采樣電阻網絡5對輸出電壓V_O采樣得到的反饋電壓V_FB與V_REF進行誤差放大，以便于根據誤差放大的結果，調整功率調整管4的柵極電壓，使得輸出電壓V_O穩定輸出。

隨著物聯(lian)網技術(shu)的(de)(de)(de)(de)快速發(fa)展(zhan)(zhan)，人們對(dui)移(yi)動消費(fei)類電(dian)(dian)(dian)子設(she)備(bei)的(de)(de)(de)(de)要(yao)求(qiu)(qiu)越(yue)來越(yue)高(gao)。當電(dian)(dian)(dian)子設(she)備(bei)的(de)(de)(de)(de)系統處于睡眠待(dai)機(ji)狀態時(shi)(shi)，便要(yao)求(qiu)(qiu)電(dian)(dian)(dian)子設(she)備(bei)芯片的(de)(de)(de)(de)片內電(dian)(dian)(dian)源管理的(de)(de)(de)(de)功耗盡可能的(de)(de)(de)(de)低，以延長設(she)備(bei)的(de)(de)(de)(de)使用時(shi)(shi)間，使得電(dian)(dian)(dian)子設(she)備(bei)具有(you)(you)較長的(de)(de)(de)(de)待(dai)機(ji)時(shi)(shi)間。但是(shi)，現(xian)有(you)(you)技術(shu)中(zhong)的(de)(de)(de)(de)線性(xing)(xing)調整(zheng)器(qi)很難滿足電(dian)(dian)(dian)子設(she)備(bei)在待(dai)機(ji)時(shi)(shi)，靜態電(dian)(dian)(dian)流為(wei)幾百納(na)安培(pei)甚(shen)至幾十(shi)納(na)安培(pei)的(de)(de)(de)(de)要(yao)求(qiu)(qiu)。另外，現(xian)有(you)(you)技術(shu)中(zhong)的(de)(de)(de)(de)線性(xing)(xing)調整(zheng)器(qi)中(zhong)的(de)(de)(de)(de)采(cai)樣電(dian)(dian)(dian)阻網絡(luo)5會占用較大的(de)(de)(de)(de)芯片面積，不利于電(dian)(dian)(dian)子設(she)備(bei)的(de)(de)(de)(de)小型化的(de)(de)(de)(de)發(fa)展(zhan)(zhan)。

技術實現要素：

本發明(ming)實(shi)施方式的(de)目的(de)之一(yi)在(zai)于提供一(yi)種線(xian)性(xing)(xing)(xing)調(diao)(diao)整器(qi)，使(shi)得線(xian)性(xing)(xing)(xing)調(diao)(diao)整器(qi)靜態功耗較(jiao)低，且芯片占用面積較(jiao)小，并通過具(ju)有正(zheng)溫度特(te)性(xing)(xing)(xing)的(de)電(dian)壓偏置模塊(kuai)來補償翻轉電(dian)壓跟隨(sui)器(qi)的(de)負溫度特(te)性(xing)(xing)(xing)，使(shi)得線(xian)性(xing)(xing)(xing)調(diao)(diao)整器(qi)在(zai)無需基準電(dian)壓模塊(kuai)的(de)情況下，線(xian)性(xing)(xing)(xing)調(diao)(diao)整器(qi)的(de)輸出電(dian)壓也具(ju)有良(liang)好的(de)溫度特(te)性(xing)(xing)(xing)。

為解決上述技術問(wen)題，本(ben)發明的實施(shi)方(fang)式(shi)提供了一種線性調整器(qi)，包括(kuo)：電流偏(pian)置模塊、具有正溫(wen)度(du)特性的電壓(ya)偏(pian)置模塊以(yi)及翻轉(zhuan)電壓(ya)跟隨器(qi)；

電(dian)流偏(pian)置模塊的輸(shu)入端(duan)接收線(xian)性(xing)調整器的輸(shu)入電(dian)壓，電(dian)流偏(pian)置模塊的輸(shu)出端(duan)輸(shu)出偏(pian)置電(dian)流；

電(dian)壓偏置模(mo)塊(kuai)的(de)第(di)一輸(shu)入端與第(di)二(er)輸(shu)入端分(fen)別接收輸(shu)入電(dian)壓與偏置電(dian)流，電(dian)壓偏置模(mo)塊(kuai)的(de)輸(shu)出端輸(shu)出偏置電(dian)壓；

翻(fan)轉電(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器的第(di)一輸(shu)(shu)入(ru)端與第(di)二輸(shu)(shu)入(ru)端分別接收輸(shu)(shu)入(ru)電(dian)壓(ya)(ya)(ya)與偏置(zhi)電(dian)壓(ya)(ya)(ya)，翻(fan)轉電(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器的輸(shu)(shu)出端輸(shu)(shu)出線性調整器的輸(shu)(shu)出電(dian)壓(ya)(ya)(ya)。

本發明實施方式(shi)相對于(yu)現有(you)技術而言(yan)，線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)輸(shu)(shu)(shu)(shu)入(ru)至電(dian)(dian)(dian)(dian)(dian)流偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)模(mo)塊(kuai)的(de)(de)(de)輸(shu)(shu)(shu)(shu)入(ru)端(duan)、電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)模(mo)塊(kuai)的(de)(de)(de)第(di)一(yi)(yi)輸(shu)(shu)(shu)(shu)入(ru)端(duan)以及翻(fan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器(qi)(qi)(qi)的(de)(de)(de)第(di)一(yi)(yi)輸(shu)(shu)(shu)(shu)入(ru)端(duan)中，電(dian)(dian)(dian)(dian)(dian)流偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)模(mo)塊(kuai)產(chan)生(sheng)偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)流，且(qie)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)模(mo)塊(kuai)的(de)(de)(de)第(di)二輸(shu)(shu)(shu)(shu)入(ru)端(duan)接收(shou)該偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)流，電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)模(mo)塊(kuai)產(chan)生(sheng)偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，且(qie)翻(fan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器(qi)(qi)(qi)的(de)(de)(de)第(di)二輸(shu)(shu)(shu)(shu)入(ru)端(duan)接收(shou)該偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)由翻(fan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)端(duan)輸(shu)(shu)(shu)(shu)出(chu)(chu)。利用(yong)翻(fan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器(qi)(qi)(qi)對線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)進(jin)行跟(gen)隨(sui)補償，以便于(yu)線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)較為穩定。并且(qie)，電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)偏(pian)(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)模(mo)塊(kuai)具(ju)有(you)正(zheng)溫(wen)度(du)特(te)(te)性，能夠與翻(fan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器(qi)(qi)(qi)相互補償，抵(di)消(xiao)翻(fan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)跟(gen)隨(sui)器(qi)(qi)(qi)的(de)(de)(de)負(fu)溫(wen)度(du)特(te)(te)性，使(shi)得(de)線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)具(ju)有(you)良好(hao)的(de)(de)(de)溫(wen)度(du)特(te)(te)性。通過這種(zhong)方式(shi)，使(shi)得(de)線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)具(ju)有(you)靜態功耗較低，芯片占用(yong)面(mian)積較小(xiao)的(de)(de)(de)特(te)(te)點，并且(qie)線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)無需專門(men)的(de)(de)(de)設置(zhi)(zhi)(zhi)基準電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)模(mo)塊(kuai)，也能實現線(xian)(xian)性調(diao)(diao)(diao)整(zheng)(zheng)(zheng)器(qi)(qi)(qi)的(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)具(ju)有(you)良好(hao)的(de)(de)(de)溫(wen)度(du)特(te)(te)性。

另(ling)外，電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)模塊包括偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)與(yu)輔助輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)(shu)入(ru)端(duan)連接于線性調整器的(de)(de)輸(shu)(shu)(shu)(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)；偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)端(duan)連接于輔助輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)(shu)入(ru)端(duan)；輔助輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)端(duan)連接于電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)模塊的(de)(de)輸(shu)(shu)(shu)(shu)入(ru)端(duan)；偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)(shu)入(ru)端(duan)與(yu)輔助輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)端(duan)分別(bie)形成電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)模塊的(de)(de)輸(shu)(shu)(shu)(shu)入(ru)端(duan)與(yu)輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)端(duan)。利(li)用(yong)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)產(chan)(chan)生(sheng)所需的(de)(de)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(一般而言，所需的(de)(de)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)為納安培(pei)量級偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu))，并利(li)用(yong)輔助輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)將偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)輸(shu)(shu)(shu)(shu)出(chu)(chu)(chu)(chu)至電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)偏(pian)(pian)(pian)(pian)置(zhi)(zhi)(zhi)(zhi)(zhi)模塊。

另外，輔助輸(shu)(shu)(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)包括(kuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)與(yu)場(chang)(chang)效(xiao)(xiao)應(ying)晶體(ti)(ti)(ti)管(guan)；電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入端(duan)(duan)(duan)連(lian)接于(yu)偏(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)出(chu)(chu)(chu)端(duan)(duan)(duan)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)出(chu)(chu)(chu)端(duan)(duan)(duan)連(lian)接于(yu)場(chang)(chang)效(xiao)(xiao)應(ying)晶體(ti)(ti)(ti)管(guan)的(de)(de)漏極；場(chang)(chang)效(xiao)(xiao)應(ying)晶體(ti)(ti)(ti)管(guan)的(de)(de)源極與(yu)柵極分(fen)別(bie)連(lian)接于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)偏(pian)置(zhi)(zhi)(zhi)模塊(kuai)的(de)(de)輸(shu)(shu)(shu)入端(duan)(duan)(duan)與(yu)輸(shu)(shu)(shu)出(chu)(chu)(chu)端(duan)(duan)(duan)。本(ben)實施例提供(gong)了(le)輔助輸(shu)(shu)(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)的(de)(de)一(yi)種具體(ti)(ti)(ti)實現方式，即(ji)，利用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)將偏(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)中(zhong)的(de)(de)偏(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)復制給場(chang)(chang)效(xiao)(xiao)應(ying)晶體(ti)(ti)(ti)管(guan)的(de)(de)漏極，以便于(yu)場(chang)(chang)效(xiao)(xiao)應(ying)晶體(ti)(ti)(ti)管(guan)將偏(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)輸(shu)(shu)(shu)入至電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓偏(pian)置(zhi)(zhi)(zhi)模塊(kuai)中(zhong)。并且(qie)，采用(yong)具有(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)的(de)(de)輔助輸(shu)(shu)(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)，能夠使得偏(pian)置(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)設計方面，具有(you)較大的(de)(de)靈活(huo)性(xing)。

另(ling)外，輔(fu)助輸(shu)出(chu)(chu)電路包括場效(xiao)(xiao)應(ying)晶體(ti)(ti)管；場效(xiao)(xiao)應(ying)晶體(ti)(ti)管的漏極和柵極分別形成輔(fu)助輸(shu)出(chu)(chu)電路的輸(shu)入端和輸(shu)出(chu)(chu)端。本實施例提供了輔(fu)助輸(shu)出(chu)(chu)電路的一(yi)種(zhong)具體(ti)(ti)實現方式，增加了本發明(ming)的可行性(xing)。

另外，電壓(ya)偏置模塊(kuai)包括串聯自共(gong)源共(gong)柵晶體管(guan)SSCM(SSCM，Series Self Cascode MOSFET)電路，提(ti)供了(le)(le)一種電壓(ya)偏置模塊(kuai)的(de)(de)具體實(shi)現形式(shi)，增加了(le)(le)本發明(ming)(ming)的(de)(de)可行(xing)性。并且，在本發明(ming)(ming)中，SSCM電路能(neng)夠(gou)工作在亞閾值區，從(cong)而使(shi)線性調整器的(de)(de)靜態(tai)功耗很小。

另外，翻轉電(dian)(dian)壓(ya)跟隨器(qi)(qi)包括折(zhe)疊(die)式共(gong)源共(gong)柵(zha)(zha)放(fang)(fang)(fang)大(da)(da)器(qi)(qi)與功率(lv)調(diao)(diao)整(zheng)(zheng)管(guan)；折(zhe)疊(die)式共(gong)源共(gong)柵(zha)(zha)放(fang)(fang)(fang)大(da)(da)器(qi)(qi)的(de)(de)(de)(de)(de)第(di)一(yi)輸(shu)(shu)(shu)入(ru)端與功率(lv)調(diao)(diao)整(zheng)(zheng)管(guan)的(de)(de)(de)(de)(de)發(fa)射極形成翻轉電(dian)(dian)壓(ya)跟隨器(qi)(qi)的(de)(de)(de)(de)(de)第(di)一(yi)輸(shu)(shu)(shu)入(ru)端；折(zhe)疊(die)式共(gong)源共(gong)柵(zha)(zha)放(fang)(fang)(fang)大(da)(da)器(qi)(qi)的(de)(de)(de)(de)(de)第(di)二輸(shu)(shu)(shu)入(ru)端形成翻轉電(dian)(dian)壓(ya)跟隨器(qi)(qi)的(de)(de)(de)(de)(de)第(di)二輸(shu)(shu)(shu)入(ru)端；折(zhe)疊(die)式共(gong)源共(gong)柵(zha)(zha)放(fang)(fang)(fang)大(da)(da)器(qi)(qi)的(de)(de)(de)(de)(de)第(di)一(yi)輸(shu)(shu)(shu)出(chu)(chu)端連接于功率(lv)調(diao)(diao)整(zheng)(zheng)管(guan)的(de)(de)(de)(de)(de)柵(zha)(zha)極；折(zhe)疊(die)式共(gong)源共(gong)柵(zha)(zha)放(fang)(fang)(fang)大(da)(da)器(qi)(qi)的(de)(de)(de)(de)(de)第(di)二輸(shu)(shu)(shu)出(chu)(chu)端形成翻轉電(dian)(dian)壓(ya)跟隨器(qi)(qi)的(de)(de)(de)(de)(de)輸(shu)(shu)(shu)出(chu)(chu)端，且(qie)連接于功率(lv)調(diao)(diao)整(zheng)(zheng)管(guan)的(de)(de)(de)(de)(de)漏極。利(li)用(yong)折(zhe)疊(die)式共(gong)源共(gong)柵(zha)(zha)放(fang)(fang)(fang)大(da)(da)器(qi)(qi)對線性調(diao)(diao)整(zheng)(zheng)器(qi)(qi)的(de)(de)(de)(de)(de)輸(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)壓(ya)進行(xing)采樣，誤(wu)差放(fang)(fang)(fang)大(da)(da)，誤(wu)差方法的(de)(de)(de)(de)(de)結(jie)果(guo)輸(shu)(shu)(shu)出(chu)(chu)并作用(yong)在功率(lv)調(diao)(diao)整(zheng)(zheng)管(guan)的(de)(de)(de)(de)(de)柵(zha)(zha)極，以(yi)調(diao)(diao)整(zheng)(zheng)功率(lv)調(diao)(diao)整(zheng)(zheng)管(guan)的(de)(de)(de)(de)(de)柵(zha)(zha)電(dian)(dian)壓(ya)使(shi)得(de)線性調(diao)(diao)整(zheng)(zheng)器(qi)(qi)的(de)(de)(de)(de)(de)輸(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)壓(ya)穩定輸(shu)(shu)(shu)出(chu)(chu)。

另(ling)外(wai)，翻轉電壓跟隨器(qi)(qi)還(huan)包括(kuo)輸(shu)(shu)出(chu)(chu)電容(rong)；輸(shu)(shu)出(chu)(chu)電容(rong)連接在翻轉電壓跟隨器(qi)(qi)的輸(shu)(shu)出(chu)(chu)端與接地端之間。利用輸(shu)(shu)出(chu)(chu)電容(rong)保證線性調(diao)整器(qi)(qi)的穩定性。

附圖說明

圖1是現有(you)技(ji)術中線(xian)性調(diao)整器(qi)的結構示意(yi)圖；

圖2是根(gen)據本發明第一實(shi)施方式中線性(xing)調整器的結(jie)構示意圖；

圖(tu)3是根據本發明第一實施(shi)方式中(zhong)線(xian)性(xing)調整器的電路示意圖(tu)；

圖4是根據本(ben)發明第(di)一實施方式中納安培量級偏置電流產生電路的電路示意(yi)圖；

圖5是根(gen)據(ju)本(ben)發明第(di)二實(shi)施(shi)方式(shi)中線性調整器的(de)電路示(shi)意圖。

具體實施方式

為使本(ben)發明(ming)的(de)目的(de)、技(ji)術(shu)方(fang)(fang)案和(he)優點更加清(qing)楚，下(xia)(xia)面將結合附圖(tu)對本(ben)發明(ming)的(de)各實施方(fang)(fang)式進行詳細(xi)的(de)闡述。然(ran)而，本(ben)領域的(de)普通技(ji)術(shu)人員可(ke)以理解，在本(ben)發明(ming)各實施方(fang)(fang)式中，為了使讀者更好地理解本(ben)申請(qing)而提出了許多技(ji)術(shu)細(xi)節(jie)。但是，即使沒有這些技(ji)術(shu)細(xi)節(jie)和(he)基于以下(xia)(xia)各實施方(fang)(fang)式的(de)種種變(bian)化和(he)修改，也可(ke)以實現本(ben)申請(qing)所要求保護的(de)技(ji)術(shu)方(fang)(fang)案。

本(ben)發(fa)明的(de)第一實(shi)(shi)施(shi)方式涉及一種線(xian)性調整器(qi)(qi)，包括：電(dian)(dian)(dian)流偏置(zhi)模(mo)塊(kuai)、具(ju)有正溫度特性的(de)電(dian)(dian)(dian)壓偏置(zhi)模(mo)塊(kuai)以(yi)及翻(fan)轉電(dian)(dian)(dian)壓跟隨器(qi)(qi)，如圖(tu)2所示。本(ben)實(shi)(shi)施(shi)方式中的(de)線(xian)性調整器(qi)(qi)可(ke)以(yi)應用于可(ke)充電(dian)(dian)(dian)電(dian)(dian)(dian)池(chi)的(de)移動終端，如手機、電(dian)(dian)(dian)腦(nao)、平板電(dian)(dian)(dian)腦(nao)、穿戴設備(bei)等。

電流偏置模塊6的輸入端接收線性調整器的輸入電壓V_IN，電流偏置模塊6的輸出端輸出偏置電流。電壓偏置模塊7的第一輸入端與第二輸入端分別接收輸入電壓V_IN與偏置電流，電壓偏置模塊7的輸出端輸出偏置電壓。翻轉電壓跟隨器8的第一輸入端與第二輸入端分別接收輸入電壓V_IN與偏置電壓，翻轉電壓跟隨器8的輸出端輸出線性調整器的輸出電壓V_O。

具體的說，電流偏置模塊6產生偏置電流，并將偏置電流輸出給電壓偏置模塊7，由電壓偏置模塊7產生偏置電壓。利用翻轉電壓跟隨器8對線性調整器的輸出電壓V_O進行跟隨補償，以便于線性調整器的輸出電壓V_O較為穩定。并且，電壓偏置模塊7具有正溫度特性，能夠與翻轉電壓跟隨器8相互補償，抵消翻轉電壓跟隨器8的負溫度特性，使得線性調整器的輸出電壓V_O具(ju)有(you)良(liang)好的溫度特(te)性。

本實施方式中，電流偏置模塊6包括偏置電流產生電路與輔助輸出電路。偏置電流產生電路的輸入端連接于線性調整器的輸入電壓V_IN，偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產(chan)生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)端(duan)(duan)(duan)(duan)連接于輔助(zhu)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)入端(duan)(duan)(duan)(duan)。輔助(zhu)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)端(duan)(duan)(duan)(duan)連接于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓偏(pian)置(zhi)模(mo)塊7的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)入端(duan)(duan)(duan)(duan)。偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產(chan)生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)入端(duan)(duan)(duan)(duan)與輔助(zhu)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)出(chu)(chu)端(duan)(duan)(duan)(duan)分別形成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)偏(pian)置(zhi)模(mo)塊的(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)入端(duan)(duan)(duan)(duan)與輸(shu)(shu)(shu)(shu)出(chu)(chu)端(duan)(duan)(duan)(duan)。利用偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產(chan)生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)產(chan)生所需的(de)(de)(de)(de)偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(一般而言，所需的(de)(de)(de)(de)偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)為納安培量級偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu))，并(bing)利用輔助(zhu)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)將偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產(chan)生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)偏(pian)置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)輸(shu)(shu)(shu)(shu)出(chu)(chu)至(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓偏(pian)置(zhi)模(mo)塊。

其(qi)中，輔助輸出電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)包括電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)與場(chang)(chang)效(xiao)應晶(jing)(jing)(jing)(jing)體(ti)管(guan)(guan)。電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸入(ru)端(duan)連接(jie)于偏(pian)(pian)置電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸出端(duan)，電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輸出端(duan)連接(jie)于場(chang)(chang)效(xiao)應晶(jing)(jing)(jing)(jing)體(ti)管(guan)(guan)的(de)(de)漏極。場(chang)(chang)效(xiao)應晶(jing)(jing)(jing)(jing)體(ti)管(guan)(guan)的(de)(de)源極與柵極分別連接(jie)于電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)偏(pian)(pian)置模(mo)塊(kuai)的(de)(de)輸入(ru)端(duan)與輸出端(duan)。利用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)將偏(pian)(pian)置電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中的(de)(de)偏(pian)(pian)置電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)復制給場(chang)(chang)效(xiao)應晶(jing)(jing)(jing)(jing)體(ti)管(guan)(guan)的(de)(de)漏極，以便于場(chang)(chang)效(xiao)應晶(jing)(jing)(jing)(jing)體(ti)管(guan)(guan)將偏(pian)(pian)置電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)輸入(ru)至電(dian)(dian)(dian)(dian)(dian)壓(ya)偏(pian)(pian)置模(mo)塊(kuai)中。并且，采用(yong)(yong)具有電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)鏡(jing)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)輔助輸出電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，能夠(gou)使得偏(pian)(pian)置電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)在選型(xing)方面，具有較大的(de)(de)靈活性。

下面以圖3所示的電路對線性調整器的工作原理進行說明：

電流偏置模塊6包括偏置電流產生電路與輔助輸出電路。偏置電流產生電路為可以采用如圖3所示的納安培量級偏置電流產生電路。輔助輸出電路包括電流鏡電路與場效應晶體管M₂。電流鏡電路包括場效應晶體管M₁以及M₃，場效應晶體管M₁的漏極作為電流鏡電路的輸入端，場效應晶體管M₃的漏極作為電流鏡電路的輸出端。其中，納安培量級偏置電流產生電路的具體電路的一種實施例可參看圖4。如圖4所示，場效應晶體管M₈、M₁₁、M₁₃以及M₁₅的源極作為納安培量級偏置電流產生電路的輸入端，場效應晶體管M₁₅的漏(lou)極作為納安(an)培量級偏置(zhi)電流產生電路的輸出端(duan)。

圖4中的N、J、K表示電流鏡電路的鏡像比率，其中N是M₁₁與M₈組成的電流鏡電路的鏡像比率，J是M₁₄與M₁₂組成的電流鏡電路的鏡像比率，K是M₁₁與M₁₃組成的電流鏡電路的鏡像比率，M₉與M₁₀構成自共源共柵(zha)晶體管SCM電路。

其中，M₈至M₁₄是納安培量級偏置電流產生電路的主體電路，M₁₅是(shi)納安培量級(ji)偏置(zhi)電(dian)(dian)流產生(sheng)電(dian)(dian)路(lu)的偏置(zhi)電(dian)(dian)流輸出端。

由于M₁₄與M₁₂組成的電流鏡電路工作在亞閾值區，且鏡像比率大于1(J>1)，因此M₁₂、M₁₄的柵-源電壓V_GS將不同，V_GS14>V_GS12。M₁₂的源極產生一個電壓，該電壓為V_GS14與V_GS12的差值。

M₉與M₁₀構成的自共源共柵晶體管SCM電路中，M₁₀工作在線性區，電氣特性上可以等效為一個電阻。并且，由于M₁₀的漏極由上述M₁₂的源極電壓偏置，因而產生的輸出電流等于M₁₂的源極電壓與M₁₀的等效電阻的比值。

由于V_GS14與V_GS12的差值比較小，僅有幾十毫伏，且M₁₀的等效電阻是晶體管電阻，在實際操作時，將M₁₀設計(ji)成倒比管，就可(ke)以(yi)很容(rong)易的(de)(de)得(de)到很大的(de)(de)等效(xiao)阻值，從而能夠得(de)到納安培量級的(de)(de)偏置電流輸出。

綜上所(suo)述，本實(shi)施方式所(suo)提及(ji)的(de)納安培量級偏置(zhi)(zhi)電(dian)流產生電(dian)路具(ju)有輸(shu)出偏置(zhi)(zhi)電(dian)流小(xiao)，靜態功耗小(xiao)，占用芯片面積小(xiao)的(de)特點。

納安培量級偏置電流產生電路的輸入端、場效應晶體管的源極M₂作為電流偏置模塊6的輸入端，接收線性調整器的輸入電壓V_IN，場效應晶體管M₂的柵極作為電流偏置模塊6的輸出端，與電壓偏置模塊7的輸入端連接。其中，納安培量級偏置電流產生電路的輸出端與場效應晶體管M₁的漏極連接。場效應晶體管M₁的柵極與漏極連接，且與場效應晶體管M₃的柵極連接。場效應晶體管M₃的漏極與場效應晶體管M₂的漏極連接。場效應晶體管M₁的源極與場效應晶體管M₃的源極均接地。

具有正溫度特性的電壓偏置模塊7可為串聯自共源共柵晶體管SSCM電路，且SSCM電路的級數可為三級，由圖3中所示的場效應晶體管M_B1至M_B4、M_U1至M_U3、M_D1至M_D3組成。本實施方式中，對SSCM電路的級數不作任何限制，SSCM電路的級數可以根據不同的補償量需求及輸出電壓V_O的需(xu)求(qiu)，進行選擇。另外(wai)需(xu)要強調(diao)的是，本實(shi)施例對(dui)電(dian)(dian)壓(ya)偏置(zhi)模塊的具體結構形(xing)式(shi)也不作任(ren)何限制，只要是具有正溫度特(te)性的電(dian)(dian)壓(ya)偏置(zhi)模塊的任(ren)何結構形(xing)式(shi)，均可以應用于本實(shi)施方式(shi)中。

具體的說，圖3中所示的場效應晶體管M_B1、M_U1以及M_D1組成SSCM電路的第一級電路，M_B2、M_U2以及M_D2組成SSCM電路的第二級電路，M_B3、M_U3以及M_D3組成SSCM電路(lu)(lu)的第三級(ji)電路(lu)(lu)。以下對(dui)SSCM電路(lu)(lu)中(zhong)各級(ji)電路(lu)(lu)進行(xing)詳細說(shuo)明：

SSCM電(dian)路中的第(di)一級電(dian)路：

M_B1的源極接收線性調整器的輸入電壓V_IN，柵極與場效應晶體管M₂的柵極連接，漏極與M_U1的漏極連接。M_U1的柵極與漏極連接，源極與M_D1的漏極連接。M_D1的柵極與M_U1的柵極連接，源極接地。其中，M_D1的漏極與M_U1的源極相連，并作為SSCM電路第一級的輸出端，輸出電壓為V_SSCM1。

其中，V_SSCM1＝V_{GS_MD1}-V_{GS_MU1}，V_{GS_MD1}為M_D1的柵源電壓，V_{GS_MU1}為M_U1的柵源電壓。M_B1的電流放大系數為k₁，從而使得納安培量級偏置電流產生電路產生的偏置電流I₀在經過M_B1后，放大為k₁*I₀。

SSCM電路中的第(di)二(er)級電路：

M_B2的源極接收線性調整器的輸入電壓V_IN，柵極與場效應晶體管M₂的柵極連接，漏極與M_U2的漏極連接。M_U2的柵極與漏極連接，源極與M_D2的漏極連接。M_D2的柵極與M_U2的柵極連接，源極接地。其中，M_D2的漏極與M_U2的源極相連，并作為SSCM電路第二級的輸出端，輸出電壓為V_SSCM2。

其中，V_SSCM2＝V_{GS_MD2}-V_{GS_MU2}，V_{GS_MD2}為M_D2的柵源電壓，V_{GS_MU2}為M_U2的柵源電壓。M_B2的電流放大系數為k₂，從而使得納安培量級偏置電流產生電路產生的偏置電流I₀在經過M_B2后，放大為k₂*I₀。

SSCM電(dian)路中的第(di)三級電(dian)路：

M_B3的源極接收線性調整器的輸入電壓V_IN，柵極與場效應晶體管M₂的柵極連接，漏極與M_U3的漏極連接。M_U3的柵極與漏極連接，源極與M_D3的漏極連接。M_D3的柵極與M_U3的柵極連接，源極接地。其中，M_D3的漏極與M_U3的源極相連，并作為SSCM電路第三級的輸出端，輸出電壓為V_SSCM3。

其中，V_SSCM3＝V_{GS_MD3}-V_{GS_MU3}，V_{GS_MD3}為M_D3的柵源電壓，V_{GS_MU3}為M_U3的柵源電壓。M_B3的電流放大系數為k₃，從而使得納安培量級偏置電流產生電路產生的偏置電流I₀在經過M_B3后，放大為k₃*I₀。

翻轉電壓跟隨器8包括折疊式共源共柵放大器與功率調整管M_P。其中，折疊式共源共柵放大器由場效應晶體管M₄至場效應晶體管M₇組成。其中，場效應晶體管M₄的源極即為折疊式共源共柵放大器的第一輸入端，與功率調整管M_P的發射極一起形成翻轉電壓跟隨器8的第一輸入端。場效應晶體管M₅的柵極即為折疊式共源共柵放大器的第二輸入端，形成翻轉電壓跟隨器8的第二輸入端。場效應晶體管M₄的漏極即為折疊式共源共柵放大器的第一輸出端，與功率調整管M_P的柵極連接。場效應晶體管M₇的源極即為折疊式共源共柵放大器的第二輸出端，形成翻轉電壓跟隨器8的輸出端，且連接于功率調整管M_P的漏極。

具體的說：納安培量級偏置電流產生電路產生偏置電流I₀，I₀經過電流鏡電路轉換后，輸出給SSCM電路。SSCM電路輸出電壓V_B及V_PTAT分別作用在場效應晶體管M₅和場效應晶體管M₇的柵極。當線性調整器的輸入電壓V_IN上電，電路工作穩定時，線性調整器的輸出電壓V_O＝V_PTAT+V_GS7。其中，V_GS7＝V_TH+V_OVM7，V_TH為場效應晶體管M₇的閾值電壓，V_OVM7是場效應晶體管M₇的過驅動電壓，當場效應晶體管M₇工作在亞閾值區時，V_OVM7可以忽略不計。

場效應晶體管M₇的源極對線性調整器的輸出電壓V_O進行采樣，然后經場效應晶體管M₄至場效應晶體管M₇組成的折疊式共源共柵放大器做誤差放大，誤差放大的結果在節點Y輸出，作用在功率調整管M_P的柵極。其中，場效應晶體管M₄和場效應晶體管M₆為折疊式共源共柵放大器提供偏置電流I_B1和I_B2，且I_B2>I_B1。V_B偏置在場效應晶體管M₅的柵極使得節點X有合適的偏置電壓，以保證場效應晶體管M₆和場效應晶體管M₇均工(gong)作(zuo)在合適的工(gong)作(zuo)電壓下。

由于線性調整器的輸入電壓V_IN不變，因此如果線性調整器的輸出電壓V_O增大，則折疊式共源共柵放大器上的電壓V_O-V_IN也會增大；這樣，Y節點上的電壓會變大，使得功率調整管M_P關閉，線性調整器的輸出電壓V_O減小。反之，如果如果線性調整器的輸出電壓V_O減小，折疊式共源共柵放大器上的電壓V_O-V_IN也會減小，則Y節點上的電壓也會減小，此時功率調整管M_P會增大供給電流，以使得線性調整器的輸出電壓V_O增大。

值得一提的是，本實施方式中，翻轉電壓跟隨器8還包括輸出電容C₀。輸出電容C₀連接在翻轉電壓跟隨器8的輸出端與接地端之間。利用輸出電容C₀來(lai)保證線性調整器的穩定性。

以下對電壓偏置模塊7與翻轉電壓跟隨器8相互補償的原理(li)進行說明：

從上文可知：V_O＝V_PTAT+V_GS7。由于翻轉電壓跟隨器8具有負溫度特性，因此，需合理的設計SSCM電路，以使得SSCM電路有合適的正溫度特性，從而使得線性調整器的輸出電壓V_O在全溫度范圍內都有良好的精度。即，需要使得SSCM電路中的V_PTAT有合適的正溫度特性，以便于V_PTAT可(ke)以補(bu)償翻轉電壓跟隨器8的負溫度特性。

本實施方式中，SSCM電路的級數為三級，SSCM電路中第i級的輸出V_SSCMi＝V_{GS_MDi}-V_{GS_MUi}。由(you)于(yu)SSCM電(dian)路工作(zuo)在(zai)亞閾值區，根據亞閾值區的電(dian)流-電(dian)壓公式(shi)得(de)到SSCM電(dian)路每一級(ji)的輸(shu)出(chu)為：

公式(1)：

其中，n是亞閾值斜率系數、V_T是熱電壓、I_S0是工藝相關的參數、S_MDi和S_MUi分別表示M_Di和M_Ui的溝道寬長比。

將上述公式(1)與圖3相結合，可(ke)得：

公式(2)：

已知，場效應晶體管(guan)的(de)閾值電壓可以表示成：

公式(3)：

|V_TH(T)|＝|V_TH(T₀)|-α_VT(T-T₀)

|VTH(T)|＝|VTH(T0)|-αVT(T-T0)

其中，T是絕對溫度、T₀是參考絕對溫度(如室溫)、α_VT是場效應晶體(ti)管(guan)的(de)(de)閾值電壓的(de)(de)溫度系數。

假設，場效應晶體管M₇也工作在亞閾值區，則結合式公式(2)、公式(3)可得到輸出電壓V_O為：

公式(4)：

不難看出，當(dang)SSCM電路的級數為N時，公式(shi)(4)可以拓展為：

公式(5)：

對輸出電壓V_O按照溫度進行求導，獲得：

公式(6)：

以及公式(7)：

其中，k_b為玻爾茲曼常數、q為電位電荷常數。

由公式(6)、(7)可知，合理的設計SSCM的級數、電流放大系數k_i(i＝1,2,…,N，N+1)、M_Ui及M_Di(i＝1,2,…,N)的尺寸以及場效應晶體管M₇的尺寸使得時，則輸出電壓V_O表現為零溫度特性。

不難(nan)看出(chu)(chu)，本實施方式中，利(li)用(yong)翻轉(zhuan)電壓(ya)(ya)(ya)(ya)跟隨(sui)(sui)器8對線(xian)性調整(zheng)(zheng)(zheng)器的(de)輸(shu)(shu)出(chu)(chu)電壓(ya)(ya)(ya)(ya)進行(xing)跟隨(sui)(sui)補償(chang)，以(yi)便于線(xian)性調整(zheng)(zheng)(zheng)器的(de)輸(shu)(shu)出(chu)(chu)電壓(ya)(ya)(ya)(ya)較(jiao)(jiao)(jiao)為穩(wen)定。并(bing)且(qie)，電壓(ya)(ya)(ya)(ya)偏置(zhi)模(mo)塊7具(ju)有正溫(wen)度特性，能夠與翻轉(zhuan)電壓(ya)(ya)(ya)(ya)跟隨(sui)(sui)器8相互補償(chang)，抵消翻轉(zhuan)電壓(ya)(ya)(ya)(ya)跟隨(sui)(sui)器8中的(de)負溫(wen)度特性，使得線(xian)性調整(zheng)(zheng)(zheng)器的(de)輸(shu)(shu)出(chu)(chu)電壓(ya)(ya)(ya)(ya)具(ju)有良好的(de)溫(wen)度特性。這樣，從而使得線(xian)性調整(zheng)(zheng)(zheng)器無(wu)需專門的(de)設置(zhi)基準電壓(ya)(ya)(ya)(ya)模(mo)塊，節省(sheng)了(le)電流消耗(hao)(hao)，線(xian)性調整(zheng)(zheng)(zheng)器具(ju)有靜態功耗(hao)(hao)較(jiao)(jiao)(jiao)低，芯片(pian)占(zhan)用(yong)面積較(jiao)(jiao)(jiao)小的(de)特點。

本發明的第二實施方式涉及一種線性調整器，如圖5所示。第二實施方式與第一實施方式大致相同，主要區別之處在于：在本發明第一實施方式中，輔助輸出電路包括電流鏡電路與場效應晶體管。而在本發明第二實施方式中，輔助輸出電路只包括場效應晶體管M₁₆。

具體的說，場效應晶體管M₁₆的漏極和柵極分別形成輔助輸出電路的輸入端和輸出端。場效應晶體管M₁₆的漏極與納安培量級偏置電流產生電路的輸入端連接，柵極與折疊式共源共柵放大器的場效應晶體管M₆的柵極連接。其中，M₁₆的源極接地，柵極還連接M₁₆的漏極。

本實施方式中，場效應晶體管M₁₆不需要與SSCM電路連接，場效應晶體管M₁₆作用是接收偏(pian)置(zhi)電(dian)流，給翻轉電(dian)壓跟隨器8提供偏(pian)置(zhi)電(dian)流。

本(ben)領域的(de)普(pu)通技術人員可(ke)以(yi)理解(jie)，上述各實(shi)施方式是實(shi)現本(ben)發明(ming)的(de)具體實(shi)施例，而(er)在實(shi)際(ji)應用中，可(ke)以(yi)在形式上和細(xi)節上對其(qi)作各種改變，而(er)不(bu)偏(pian)離(li)本(ben)發明(ming)的(de)精(jing)神和范(fan)圍(wei)。