本(ben)實(shi)用新(xin)型屬于音(yin)(yin)頻輸出(chu)技術領域，具(ju)體涉及一種基于電子(zi)管(guan)的音(yin)(yin)頻輸出(chu)電路(lu)。

背景技術：

HIFI類(lei)音(yin)(yin)(yin)(yin)(yin)(yin)源產(chan)品追求(qiu)聲(sheng)音(yin)(yin)(yin)(yin)(yin)(yin)的(de)(de)高(gao)(gao)保(bao)真還原，對音(yin)(yin)(yin)(yin)(yin)(yin)質(zhi)的(de)(de)要求(qiu)達到(dao)(dao)極致，不(bu)(bu)僅對聲(sheng)音(yin)(yin)(yin)(yin)(yin)(yin)輸(shu)(shu)出(chu)(chu)的(de)(de)技(ji)(ji)術(shu)指標(biao)(biao)要求(qiu)比普通音(yin)(yin)(yin)(yin)(yin)(yin)響高(gao)(gao)，而且在主觀聽感方面(mian)也有諸多(duo)特定的(de)(de)評(ping)價指標(biao)(biao)，因(yin)此，HIFI類(lei)音(yin)(yin)(yin)(yin)(yin)(yin)源產(chan)品在電(dian)(dian)路設計、原材料選(xuan)用上(shang)相(xiang)比普通音(yin)(yin)(yin)(yin)(yin)(yin)響要求(qiu)更高(gao)(gao)。目前，高(gao)(gao)保(bao)真CD播(bo)(bo)放(fang)機、音(yin)(yin)(yin)(yin)(yin)(yin)樂播(bo)(bo)放(fang)器、數(shu)字音(yin)(yin)(yin)(yin)(yin)(yin)頻(pin)(pin)解(jie)(jie)碼(ma)器等HIFI類(lei)音(yin)(yin)(yin)(yin)(yin)(yin)源產(chan)品在設計時，多(duo)以高(gao)(gao)級(ji)運(yun)放(fang)IC搭(da)建音(yin)(yin)(yin)(yin)(yin)(yin)頻(pin)(pin)輸(shu)(shu)出(chu)(chu)電(dian)(dian)路，雖然可以將常(chang)(chang)規技(ji)(ji)術(shu)指標(biao)(biao)發揮(hui)得(de)很(hen)好(hao)，但(dan)成(cheng)本較(jiao)高(gao)(gao)，電(dian)(dian)流驅動力(li)相(xiang)對不(bu)(bu)足，主觀聽感泛音(yin)(yin)(yin)(yin)(yin)(yin)少，較(jiao)干(gan)澀，“數(shu)碼(ma)味”較(jiao)濃(nong)；也有少數(shu)采用晶體管(guan)及(ji)電(dian)(dian)子管(guan)搭(da)建音(yin)(yin)(yin)(yin)(yin)(yin)頻(pin)(pin)輸(shu)(shu)出(chu)(chu)電(dian)(dian)路的(de)(de)，雖能在一定程度上(shang)解(jie)(jie)決運(yun)放(fang)IC的(de)(de)不(bu)(bu)足，但(dan)由于在電(dian)(dian)路架(jia)構(gou)、供電(dian)(dian)電(dian)(dian)源設計、元件(jian)選(xuan)型、參數(shu)選(xuan)擇等方面(mian)比高(gao)(gao)級(ji)運(yun)放(fang)IC復雜很(hen)多(duo)，很(hen)難同時保(bao)證各個指標(biao)(biao)都滿足要求(qiu)，例如(ru)在信噪比、頻(pin)(pin)響、失(shi)真度等方面(mian)沒有高(gao)(gao)級(ji)運(yun)放(fang)IC處理得(de)好(hao)，反(fan)過來又(you)會影響聽感。因(yin)此，為了(le)解(jie)(jie)決高(gao)(gao)保(bao)真CD播(bo)(bo)放(fang)機、音(yin)(yin)(yin)(yin)(yin)(yin)樂播(bo)(bo)放(fang)器、數(shu)字音(yin)(yin)(yin)(yin)(yin)(yin)頻(pin)(pin)解(jie)(jie)碼(ma)器等HIFI類(lei)音(yin)(yin)(yin)(yin)(yin)(yin)源產(chan)品的(de)(de)音(yin)(yin)(yin)(yin)(yin)(yin)頻(pin)(pin)輸(shu)(shu)出(chu)(chu)電(dian)(dian)路在常(chang)(chang)規技(ji)(ji)術(shu)指標(biao)(biao)與主觀聽感評(ping)價指標(biao)(biao)方面(mian)的(de)(de)平(ping)衡問題，設計出(chu)(chu)一種基(ji)于電(dian)(dian)子管(guan)的(de)(de)音(yin)(yin)(yin)(yin)(yin)(yin)頻(pin)(pin)輸(shu)(shu)出(chu)(chu)電(dian)(dian)路，充分發揮(hui)電(dian)(dian)子管(guan)音(yin)(yin)(yin)(yin)(yin)(yin)色(se)好(hao)的(de)(de)特點，使產(chan)品的(de)(de)綜合聲(sheng)音(yin)(yin)(yin)(yin)(yin)(yin)輸(shu)(shu)出(chu)(chu)指標(biao)(biao)達到(dao)(dao)行業領(ling)先水平(ping)。

技術實現要素：

有鑒于(yu)此，本實用(yong)新型提供一種基于(yu)電子管的(de)音頻(pin)輸(shu)出電路。

本實用新型采用如(ru)下(xia)技(ji)術方案，一(yi)種(zhong)基于(yu)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)的(de)(de)音頻輸(shu)(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)，包括第(di)(di)一(yi)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)、第(di)(di)一(yi)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)、第(di)(di)一(yi)輸(shu)(shu)(shu)出(chu)耦合電(dian)(dian)(dian)(dian)(dian)容、第(di)(di)二(er)(er)(er)(er)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)、第(di)(di)二(er)(er)(er)(er)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)、第(di)(di)二(er)(er)(er)(er)輸(shu)(shu)(shu)出(chu)耦合電(dian)(dian)(dian)(dian)(dian)容、電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)屏極(ji)(ji)供(gong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)和電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)燈絲供(gong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)；所(suo)述(shu)第(di)(di)一(yi)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)(duan)接(jie)(jie)(jie)左聲道輸(shu)(shu)(shu)入(ru)(ru)信號(hao)，第(di)(di)一(yi)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)出(chu)端(duan)(duan)(duan)與(yu)(yu)第(di)(di)一(yi)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)(duan)連接(jie)(jie)(jie)，第(di)(di)一(yi)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)(duan)與(yu)(yu)第(di)(di)一(yi)輸(shu)(shu)(shu)出(chu)耦合電(dian)(dian)(dian)(dian)(dian)容連接(jie)(jie)(jie)；所(suo)述(shu)第(di)(di)二(er)(er)(er)(er)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)(duan)接(jie)(jie)(jie)右聲道輸(shu)(shu)(shu)入(ru)(ru)信號(hao)，第(di)(di)二(er)(er)(er)(er)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)出(chu)端(duan)(duan)(duan)與(yu)(yu)第(di)(di)二(er)(er)(er)(er)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)(duan)連接(jie)(jie)(jie)，第(di)(di)二(er)(er)(er)(er)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)(duan)與(yu)(yu)第(di)(di)二(er)(er)(er)(er)輸(shu)(shu)(shu)出(chu)耦合電(dian)(dian)(dian)(dian)(dian)容連接(jie)(jie)(jie)；所(suo)述(shu)第(di)(di)一(yi)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)和第(di)(di)一(yi)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)共(gong)用一(yi)只(zhi)雙三極(ji)(ji)管(guan)(guan)(guan)類型電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)，第(di)(di)二(er)(er)(er)(er)放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)和第(di)(di)二(er)(er)(er)(er)陰極(ji)(ji)跟隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)共(gong)用一(yi)只(zhi)雙三極(ji)(ji)管(guan)(guan)(guan)類型電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)，兩電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)工作狀態為單端(duan)(duan)(duan)甲類；所(suo)述(shu)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)屏極(ji)(ji)供(gong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)分(fen)(fen)別與(yu)(yu)兩電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)屏極(ji)(ji)對應連接(jie)(jie)(jie)，所(suo)述(shu)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)燈絲供(gong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)(lu)(lu)(lu)分(fen)(fen)別與(yu)(yu)兩電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)管(guan)(guan)(guan)對應連接(jie)(jie)(jie)。

優選的(de)，包(bao)括延時電路，所述延時電路通過延時繼(ji)電器控制所述音頻輸出(chu)電路的(de)信號輸出(chu)。

優(you)選的，所述第一輸(shu)出耦(ou)合電容(rong)(rong)(rong)由2.2μF電容(rong)(rong)(rong)與(yu)0.22μF電容(rong)(rong)(rong)并聯組(zu)成(cheng)，所述第二輸(shu)出耦(ou)合電容(rong)(rong)(rong)由2.2μF電容(rong)(rong)(rong)與(yu)0.22μF電容(rong)(rong)(rong)并聯組(zu)成(cheng)。

優選的，所述電(dian)(dian)子(zi)管屏(ping)極供電(dian)(dian)電(dian)(dian)路通過電(dian)(dian)阻分(fen)壓(ya)(ya)單元與所述電(dian)(dian)子(zi)管燈絲供電(dian)(dian)電(dian)(dian)路連接，將屏(ping)極電(dian)(dian)壓(ya)(ya)經電(dian)(dian)阻分(fen)壓(ya)(ya)單元分(fen)壓(ya)(ya)后(hou)接到電(dian)(dian)子(zi)管燈絲供電(dian)(dian)電(dian)(dian)路。

優選的，所述屏極(ji)電(dian)壓為(wei)125V,經電(dian)阻(zu)分(fen)壓單元(yuan)分(fen)壓后為(wei)36V。

優選的，所(suo)(suo)述(shu)電子管(guan)屏極供電電路包(bao)括依次連接的整(zheng)流單(dan)(dan)元、LCπ型濾波(bo)單(dan)(dan)元和RC濾波(bo)單(dan)(dan)元，所(suo)(suo)述(shu)RC濾波(bo)單(dan)(dan)元與所(suo)(suo)述(shu)電阻(zu)分壓(ya)單(dan)(dan)元的輸入端連接。

優選的(de)，所(suo)述LCπ型濾(lv)波單(dan)元包括(kuo)一個35H30mA的(de)扼流圈，所(suo)述RC濾(lv)波單(dan)元包括(kuo)并聯(lian)連(lian)接的(de)220μF電容(rong)和0.1μF電容(rong)。

優(you)選(xuan)的，所述電(dian)子管燈(deng)絲供(gong)電(dian)電(dian)路包括(kuo)整流濾波單元和穩壓單元，所述穩壓單元與所述電(dian)阻分壓單元的輸(shu)出端連接。

優選(xuan)的，所(suo)述穩壓(ya)(ya)單元包括穩壓(ya)(ya)IC7812，穩壓(ya)(ya)電壓(ya)(ya)為12.5V。

優選(xuan)的(de)，所述(shu)雙三極管類(lei)型(xing)電子管型(xing)號為6922EH。

本(ben)實用新型的有益技術效果是：

音頻(pin)輸(shu)出電(dian)路采用電(dian)子管作為(wei)核(he)心元件，充分利用電(dian)子管音色好(hao)，在單端甲(jia)類工作狀態(tai)下失真(zhen)小的(de)(de)特(te)點，既提高(gao)了電(dian)路的(de)(de)技術指(zhi)標(biao)，使(shi)之(zhi)符(fu)合(he)相關國家標(biao)準和行(xing)業標(biao)準，又改善(shan)了主觀聽(ting)感，使(shi)音評價指(zhi)標(biao)達到了HIFI類產品的(de)(de)要求，使(shi)產品檔次進(jin)一步提高(gao)，滿(man)足了高(gao)端消(xiao)費者對(dui)品質的(de)(de)要求。

【附圖說明】

圖1實施例一中的基(ji)于電子管的音頻輸出電路的結構示意圖。

圖2實施(shi)例一中的(de)(de)基(ji)于(yu)電子管的(de)(de)音頻輸出電路(lu)的(de)(de)電路(lu)原理圖。

【具體實施方式】

為了(le)使本(ben)(ben)專利(li)的技術(shu)方案和技術(shu)效果更加清(qing)楚，下面結(jie)合(he)附圖和實施例(li)對(dui)本(ben)(ben)專利(li)的具(ju)體實施方式進行詳(xiang)細描(miao)述。

實施例一：

如(ru)圖1～2所示，本(ben)實施例中的基(ji)于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)的音頻輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)是以電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)為(wei)核心元件的分立元件電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)，包括第(di)一放大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、第(di)一陰極跟(gen)隨(sui)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、第(di)一輸(shu)(shu)出(chu)耦(ou)合電(dian)(dian)(dian)(dian)(dian)(dian)容、第(di)二(er)放大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、第(di)二(er)陰極跟(gen)隨(sui)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、第(di)二(er)輸(shu)(shu)出(chu)耦(ou)合電(dian)(dian)(dian)(dian)(dian)(dian)容、延時電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)、電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)屏極供電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)燈絲供電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)選(xuan)用雙三極管(guan)(guan)(guan)類型，型號為(wei)6922EH，工(gong)作狀態為(wei)單端(duan)甲(jia)類，在單端(duan)甲(jia)類工(gong)作狀態下，電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)放大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)不僅(jin)失真(zhen)小，而且最(zui)能發揮其音色好的特(te)點，每個聲(sheng)道用一個獨立的電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)(guan)，以提高通道隔離度。

第(di)一(yi)放(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)和第(di)一(yi)陰(yin)極(ji)(ji)(ji)(ji)(ji)跟(gen)隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)共用一(yi)只(zhi)雙三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)類型(xing)電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)V1，電(dian)(dian)(dian)(dian)(dian)(dian)子管(guan)(guan)V1中(zhong)的(de)(de)(de)兩個三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1a、V1b分別組成第(di)一(yi)放(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)和第(di)一(yi)陰(yin)極(ji)(ji)(ji)(ji)(ji)跟(gen)隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，左聲道信號輸(shu)入端(duan)(duan)(duan)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L201與(yu)(yu)(yu)三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1a的(de)(de)(de)柵極(ji)(ji)(ji)(ji)(ji)連接，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1a的(de)(de)(de)柵極(ji)(ji)(ji)(ji)(ji)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L202接地(di)，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1a的(de)(de)(de)陰(yin)極(ji)(ji)(ji)(ji)(ji)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L204接地(di)，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1a的(de)(de)(de)屏(ping)極(ji)(ji)(ji)(ji)(ji)依(yi)次(ci)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L203、L205、L210與(yu)(yu)(yu)屏(ping)極(ji)(ji)(ji)(ji)(ji)供電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)輸(shu)出端(duan)(duan)(duan)連接，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1a的(de)(de)(de)屏(ping)極(ji)(ji)(ji)(ji)(ji)作(zuo)為(wei)第(di)一(yi)放(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)輸(shu)出端(duan)(duan)(duan)與(yu)(yu)(yu)作(zuo)為(wei)第(di)一(yi)陰(yin)極(ji)(ji)(ji)(ji)(ji)跟(gen)隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)輸(shu)入端(duan)(duan)(duan)三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1b的(de)(de)(de)柵極(ji)(ji)(ji)(ji)(ji)連接；三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1b的(de)(de)(de)柵極(ji)(ji)(ji)(ji)(ji)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L206接地(di)，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1b的(de)(de)(de)陰(yin)極(ji)(ji)(ji)(ji)(ji)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L207接地(di)，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1b的(de)(de)(de)屏(ping)極(ji)(ji)(ji)(ji)(ji)通過電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)L210與(yu)(yu)(yu)屏(ping)極(ji)(ji)(ji)(ji)(ji)供電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)輸(shu)出端(duan)(duan)(duan)連接，三(san)(san)(san)(san)極(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V1b的(de)(de)(de)陰(yin)極(ji)(ji)(ji)(ji)(ji)作(zuo)為(wei)第(di)一(yi)陰(yin)極(ji)(ji)(ji)(ji)(ji)跟(gen)隨(sui)(sui)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)輸(shu)出端(duan)(duan)(duan)與(yu)(yu)(yu)第(di)一(yi)輸(shu)出耦合電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)連接，第(di)一(yi)輸(shu)出耦合電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)由一(yi)只(zhi)2.2μF電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)與(yu)(yu)(yu)一(yi)只(zhi)0.22μF電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)并聯組成，通過大(da)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)并聯小(xiao)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)可(ke)有效提(ti)高(gao)信號高(gao)頻(pin)分量的(de)(de)(de)通過，提(ti)升高(gao)頻(pin)段的(de)(de)(de)聽感。

第(di)二放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)路(lu)和第(di)二陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)跟隨(sui)電(dian)(dian)(dian)(dian)路(lu)共用一只(zhi)雙三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)類型電(dian)(dian)(dian)(dian)子(zi)管(guan)(guan)V2，電(dian)(dian)(dian)(dian)子(zi)管(guan)(guan)V2中的(de)(de)兩個三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2a、V2b分(fen)別組成第(di)二放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)路(lu)和第(di)二陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)跟隨(sui)電(dian)(dian)(dian)(dian)路(lu)，右聲道信號輸(shu)(shu)入端(duan)通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R201與(yu)(yu)三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2a的(de)(de)柵極(ji)(ji)(ji)(ji)(ji)(ji)連(lian)(lian)接，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2a的(de)(de)柵極(ji)(ji)(ji)(ji)(ji)(ji)通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R202接地(di)，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2a的(de)(de)陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R204接地(di)，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2a的(de)(de)屏(ping)(ping)極(ji)(ji)(ji)(ji)(ji)(ji)依次通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R203、R205、R210與(yu)(yu)屏(ping)(ping)極(ji)(ji)(ji)(ji)(ji)(ji)供(gong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路(lu)輸(shu)(shu)出(chu)端(duan)連(lian)(lian)接，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2a的(de)(de)屏(ping)(ping)極(ji)(ji)(ji)(ji)(ji)(ji)作為(wei)第(di)二放(fang)(fang)大(da)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)輸(shu)(shu)出(chu)端(duan)與(yu)(yu)作為(wei)第(di)二陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)跟隨(sui)電(dian)(dian)(dian)(dian)路(lu)輸(shu)(shu)入端(duan)三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2b的(de)(de)柵極(ji)(ji)(ji)(ji)(ji)(ji)連(lian)(lian)接；三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2b的(de)(de)柵極(ji)(ji)(ji)(ji)(ji)(ji)通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R206接地(di)，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2b的(de)(de)陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R207接地(di)，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2b的(de)(de)屏(ping)(ping)極(ji)(ji)(ji)(ji)(ji)(ji)通(tong)(tong)過電(dian)(dian)(dian)(dian)阻R210與(yu)(yu)屏(ping)(ping)極(ji)(ji)(ji)(ji)(ji)(ji)供(gong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路(lu)輸(shu)(shu)出(chu)端(duan)連(lian)(lian)接，三(san)極(ji)(ji)(ji)(ji)(ji)(ji)管(guan)(guan)V2b的(de)(de)陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)作為(wei)第(di)二陰(yin)極(ji)(ji)(ji)(ji)(ji)(ji)跟隨(sui)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)輸(shu)(shu)出(chu)端(duan)與(yu)(yu)第(di)二輸(shu)(shu)出(chu)耦合電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)連(lian)(lian)接，第(di)二輸(shu)(shu)出(chu)耦合電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)由一只(zhi)2.2μF電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)與(yu)(yu)一只(zhi)0.22μF電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)并聯組成，通(tong)(tong)過大(da)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)并聯小(xiao)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)可有效(xiao)提(ti)高(gao)信號高(gao)頻分(fen)量的(de)(de)通(tong)(tong)過，提(ti)升高(gao)頻段的(de)(de)聽感。

電(dian)子管(guan)通電(dian)后(hou)需(xu)要一(yi)個(ge)預熱過程，在預熱過程中，電(dian)子管(guan)沒(mei)到最(zui)佳(jia)工作(zuo)狀態，聽(ting)感不佳(jia)，為解決上述左右聲道音頻(pin)輸(shu)(shu)(shu)(shu)出(chu)(chu)端接(jie)(jie)有延時電(dian)路(lu)，延時電(dian)路(lu)通過延時繼電(dian)器(qi)RL1控制音頻(pin)信(xin)號(hao)的輸(shu)(shu)(shu)(shu)出(chu)(chu)，左右聲道音頻(pin)信(xin)號(hao)分別經(jing)第(di)一(yi)輸(shu)(shu)(shu)(shu)出(chu)(chu)耦(ou)(ou)合電(dian)容和第(di)二輸(shu)(shu)(shu)(shu)出(chu)(chu)耦(ou)(ou)合電(dian)容輸(shu)(shu)(shu)(shu)出(chu)(chu)，第(di)一(yi)輸(shu)(shu)(shu)(shu)出(chu)(chu)耦(ou)(ou)合電(dian)容輸(shu)(shu)(shu)(shu)出(chu)(chu)端通過電(dian)阻(zu)(zu)L208與(yu)延時繼電(dian)器(qi)RL1的觸點(dian)(dian)1連接(jie)(jie)，觸點(dian)(dian)1通過電(dian)阻(zu)(zu)L209接(jie)(jie)地，第(di)二輸(shu)(shu)(shu)(shu)出(chu)(chu)耦(ou)(ou)合電(dian)容輸(shu)(shu)(shu)(shu)出(chu)(chu)端通過電(dian)阻(zu)(zu)R208與(yu)延時繼電(dian)器(qi)RL1的觸點(dian)(dian)2連接(jie)(jie)，觸點(dian)(dian)2通過電(dian)阻(zu)(zu)R209接(jie)(jie)地。開機時輸(shu)(shu)(shu)(shu)出(chu)(chu)信(xin)號(hao)對地短路(lu)，音頻(pin)輸(shu)(shu)(shu)(shu)出(chu)(chu)電(dian)路(lu)沒(mei)有信(xin)號(hao)輸(shu)(shu)(shu)(shu)出(chu)(chu)，約(yue)30秒待電(dian)子管(guan)預熱工作(zuo)狀態穩定(ding)、聽(ting)感變好后(hou)，延時繼電(dian)器(qi)RL1動作(zuo)，輸(shu)(shu)(shu)(shu)出(chu)(chu)信(xin)號(hao)與(yu)地斷開，正常輸(shu)(shu)(shu)(shu)出(chu)(chu)。

電(dian)(dian)子管(guan)屏極(ji)(ji)供(gong)電(dian)(dian)電(dian)(dian)路包括電(dian)(dian)依次(ci)連接(jie)的(de)整流單(dan)元(yuan)、LCπ型(xing)濾(lv)波(bo)(bo)單(dan)元(yuan)和RC濾(lv)波(bo)(bo)單(dan)元(yuan)。作為真空器(qi)件，電(dian)(dian)子管(guan)放大(da)(da)(da)電(dian)(dian)路的(de)電(dian)(dian)源紋波(bo)(bo)系數指標要求比(bi)晶體管(guan)放大(da)(da)(da)電(dian)(dian)路高很多，因此屏極(ji)(ji)電(dian)(dian)壓供(gong)電(dian)(dian)采(cai)用(yong)了(le)LCπ型(xing)濾(lv)波(bo)(bo)單(dan)元(yuan)加RC濾(lv)波(bo)(bo)單(dan)元(yuan)的(de)形(xing)式(shi)，LCπ型(xing)濾(lv)波(bo)(bo)單(dan)元(yuan)采(cai)用(yong)了(le)35H30mA的(de)大(da)(da)(da)扼流圈，在RC濾(lv)波(bo)(bo)單(dan)元(yuan)的(de)220μF大(da)(da)(da)電(dian)(dian)容(rong)旁(pang)并聯0.1μF小電(dian)(dian)容(rong)，進一步衰(shuai)減(jian)高頻(pin)噪聲(sheng)，提高電(dian)(dian)路的(de)信噪比(bi)。

電(dian)(dian)(dian)子管(guan)燈(deng)絲供電(dian)(dian)(dian)電(dian)(dian)(dian)路(lu)為電(dian)(dian)(dian)子管(guan)燈(deng)絲提供直流(liu)穩(wen)(wen)壓(ya)(ya)電(dian)(dian)(dian)源，交流(liu)電(dian)(dian)(dian)經整流(liu)濾波單元整流(liu)濾波后由穩(wen)(wen)壓(ya)(ya)單元的穩(wen)(wen)壓(ya)(ya)IC穩(wen)(wen)壓(ya)(ya)成12.5V，穩(wen)(wen)壓(ya)(ya)IC為7812。電(dian)(dian)(dian)子管(guan)燈(deng)絲采用直流(liu)穩(wen)(wen)壓(ya)(ya)供電(dian)(dian)(dian)可以降低(di)噪聲。

電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)屬(shu)高(gao)(gao)壓(ya)(ya)器件(jian)，工(gong)作時其屏(ping)(ping)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)很高(gao)(gao)，而(er)其燈(deng)(deng)絲(si)兩端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)很低，如不做特別處(chu)理(li)(li)，屏(ping)(ping)極(ji)與(yu)燈(deng)(deng)絲(si)之間(jian)就會有較高(gao)(gao)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位差，理(li)(li)論(lun)分(fen)析及實(shi)驗證明(ming)降低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)屏(ping)(ping)極(ji)與(yu)燈(deng)(deng)絲(si)間(jian)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位差對改善(shan)信(xin)(xin)噪(zao)比、提高(gao)(gao)聽感是有幫助的，因此，本設(she)計中(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)燈(deng)(deng)絲(si)供(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路采用了(le)“高(gao)(gao)地(di)”，即將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)屏(ping)(ping)極(ji)供(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的RC濾波單(dan)元(yuan)通過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻分(fen)壓(ya)(ya)單(dan)元(yuan)與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)燈(deng)(deng)絲(si)供(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的穩壓(ya)(ya)單(dan)元(yuan)連接(jie)，使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)屏(ping)(ping)極(ji)供(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(125V)經電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻分(fen)壓(ya)(ya)單(dan)元(yuan)分(fen)壓(ya)(ya)成合(he)適的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(36V)后接(jie)到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)燈(deng)(deng)絲(si)供(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，這(zhe)樣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)燈(deng)(deng)絲(si)兩端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)沒變，但整體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(36V)提高(gao)(gao)了(le)，從(cong)而(er)降低了(le)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)管(guan)燈(deng)(deng)絲(si)與(yu)屏(ping)(ping)極(ji)間(jian)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位差,改善(shan)音(yin)頻輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的信(xin)(xin)噪(zao)比、提高(gao)(gao)了(le)聽感。

以(yi)上所述僅為本(ben)(ben)專利(li)的優選實(shi)施例而已，并(bing)不用于限制(zhi)本(ben)(ben)專利(li)，對于本(ben)(ben)領(ling)域的技術人員來說，本(ben)(ben)專利(li)可以(yi)有各種更改(gai)(gai)和(he)變化。凡在本(ben)(ben)專利(li)的精神和(he)原(yuan)則之內(nei)，所作的任何修改(gai)(gai)、等(deng)同(tong)替換、改(gai)(gai)進(jin)等(deng)，均應包含在本(ben)(ben)專利(li)的保護范圍之內(nei)。