广东快乐十分

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一文了解A、B、AB、D、G、H类放大器

2020-02-02 10:49:21 来源:网路
在放大器方面,工程师和发烧友有一个共同点,他们想要一种在性能,效率和成本之间实现强大平衡的设计。因此发明出了多种放大器电路,以用于不同场合。

A类

ALEIFANGDAQISHIZUIJIANDANDEFANGDAQILEIXING,DUIYURENHESHUCHUBOXING,QISHUCHUJIDEJINGTIGUANSHIZHONGCHUYUDAOTONGZHUANGTAI(BUHUIWANQUANGUANDUAN)。ZHEILEIFANGDAQIJUYOUJIJIADEXIANXINGTEXING,DANXIAOLVHENDI。

B类

BLEIFANGDAQIDESHUCHUJIJINGTIGUANZHIZAIXINHAOBOXINGDEBANGEZHOUQI(180DU)DAOTONG,WEILEDUIZHENGGEXINHAOJINXINGFANGDA,SHIYONGLELIANGGEJINGTIGUAN,YIGEYONGYUZHENGSHUCHUXINHAO,LINGYIGEYONGYUFUSHUCHUXINHAO。BLEIFANGDAQIDEXIAOLVYUANYUANGAOYUALEIFANGDAQI,DANYOUYULIANGGEJINGTIGUANCONGTONGDAODUANGUOCHENGZHONGCUNZAIJIAOYUEDIAN,SHIZHENJIAODA。

AB类

ALEIHEBLEIZUHEJIABLEIFANGDAQI,XIAOLVGAOYUALEIFANGDAQI,SHIZHENDIYUBLEIFANGDAQI。TONGGUODUIDIANLUZHONGDELIANGGEJINGTIGUANJINXINGPIANZHI,SHIXINHAOJIEJINLING(BLEIFANGDAQIYINRUFEIXIANXINGDEGONGZUODIAN)SHILIANGGEJINGTIGUANDAOTONG;DAXINHAOSHI,JINGTIGUANZHUANHUANDAOBLEIGONGZUOFANGSHI。YOUCIKEJIAN,XIAOXINHAOSHILIANGGEJINGTIGUANJUNBAOCHIYOUXIAOGONGZUO,LEISIYUALEIFANGDAQI;DAXINHAOSHI,XIANGYINGYUBOXINGDEMEIBANZHOU,ZHIYOUYIGEJINGTIGUANBAOCHIYOUXIAOZHUANGTAI,LEISIYUBLEIFANGDAQI。

D类

DLEIFANGDAQIDESHUCHUWEIKAIGUANBOXING,KAIGUANPINLVYUANYUANGAOYUXUYAOHUIFUDEYINPINXINHAODEZUIGAOPINLV。JINGGUODITONGLVBOHOU,SHUCHUBOXINGDEPINGJUNZHIYUSHIJIDEYINPINXINHAOBAOCHIYIZHI。YOUYUGONGZUOSHISHUCHUJIJINGTIGUANCHUYUWANQUANDAOTONGHUOWANQUANGUANDUANZHUANGTAI,BUHUIJINRUJINGTIGUANDEXIANXINGGONGZUOQU(ZHEISHIDAOZHIQITALEIXINGFANGDAQIDIXIAODEYUANYIN),DLEIFANGDAQIJUYOUJIGAOXIAOLV(GAODA90%,SHENZHIGENGGAO)。XIANDAIDLEIFANGDAQIKEYIDADAOYUABLEIFANGDAQITONGDENGJIBIEDEBAOZHENDU。

G类

G类放大器与AB类放大器相同,但它采用了两路或更多的供电电源工作在小信号电平时,放大器采用较低的电源电压供电。随着信号电平的提升,放大器自动切换到适当的电源电压。由于只在必要时采用高压供电而AB类放大器则始终采用高压供电,G类放大器的效率高于AB类放大器。A类-H类放大器指南(续)

H类

H类放大器通过调节其自身的电源电压,最大程度地降低输出级的压降。可以采用多个分立电压,也可采用连续可调的电压。虽然与G类放大器技术类似,旨在降低输出级电路的功耗,但H类放大器技术无需采用多个供电电源。H类放大器的设计比其它放大器复杂,需要额外的控制电路来预测、控制电源电压。

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