音频放大器.ewb

EWB经典实用列子

88F@3D2048<HA04@G<F@O4080L1H3D7440@86H=8I02<4L9H=@<8;<L4O4N8HHA@K
4B<I4842<B<>0L<N8>83L3@74>4?DI@F014><2HH4FLAD94N<<DI@3<6L<@80I08D
=4L<8H9H;8B@5H<DN0BHB8F0G04@O8N8=0I0C<6H>0=4BLGD<@5H:0H8I0D4L<D@9
HK<G020J<LDIDC@6@>@J8BHK48HM4C0?4>874<HFHB<L<HH9DF8@0BD60=@M8B@5D
3D78<8L87@J4L@1DC468=@E8G0EDL45DA@=L1DC<=0:4L@@LHL9@K85844N<8D<H8
@9H184H70;01L8L9DN0F8;H9D30E@4L2<>8JHC<14B<14=0J@5@6@=H<818@8@L14
94?<48405HIHG0F0481H1HC<H00<L8F8?004OL$000@80@0O@00LDIDC@6@>@J8G@
>40<48ADAH3440<0@0H0:4D<<HKLAD3@403850>@NL1L:HH8F0E4:<0H@@3@3D64M
L9H>@=4N8@H9@346H:DK@JHJ0K@6<HHFHC8884L1@CDG8FLHD6DB4:8HH9@28D8MD
@020248<4@K4DDID2L70>0M0I00424F@:48<CH70>4882<K<18ILBL6L<HI@CH=@I
4HH4@K@G0G@K@HL4HHHF4AD6<H<4HI@;40@KL6H4HIDBLF4@D00K448AHJ8HHADC@
F@50;DI8L05D4D<4>494N@JDF4=@EHD@B4:<<HEHN@K89<=<K@GD5<CD2<=D?<L0G
@ADK8=0CH;@1@206D>484ID54><:H;<L4=@20IDF@=L<L4HK4GH=0F4?4:<8L5HKH
K814FHE0B4HD>L>47<3L?D@43<94H04@<@JL2L18EHKH9L40<@OH8@><>DD<=8DH3
49DF0>D=LN0I<4H3@N8H0;4;L64DL;D10G<E44HL@K@;@DH4L<@1@JLA<C<<@5H1<
386844M@28C420><=4;@4<2<1H<88@<L;LH07L$000@80D@04040<8@0<0D4080M8
L49H3874<DGHD@44A<MLL8LH1DK4HHH004240@@@A0306D8@J87H?D?4C@9@=4BLG
D<@7H>0KHI@ED283D6@80J@00440<@@9D;@1@><I8C@9DM<8HHD=@B09D9@D<64=L
K0G@E44<2L78=H@41464BLK0K@4D6<=8H8L0:HN0>DI4ID2<E<G4MLJ4K@@4F<7H<
@48G84<0H9D20><=4C4ED1@C8A0189HE<3060H<3H70=888;0N4B04<DDC@L4=830
B@;LD8D4M@:HE0545LLLD@2@<<4H6854KL3438D@A@<4=4:8:46@44LH:H><249D0
@<D0<OH04$000@LH@090D<8<0H103@40<8H@D004D8@4082040ND60LH1DC<6L>DL
@6H100@9@F8I4CD6@>8I8?@948<2HKLHDID3<F8AD@40<4810102464=8A0D@?DO8
N870C4J85H?<I4?@L0G@ADELI<<8C47@G4346DK<4L?<ID54><BHKDB<L<4H@@;D0
<2<=8=H5D><64L<=8>@FLI@@@@H;<<@D8G8HD4HJ@K@K8;DOH=@H@H@8D94KDM8NH
J0:D2H9DM0G4FD<@J4C0A4A<B8G8>D94K0@@6814ID@@C8=<=8E8=<<H48G46H6HC
0B4><I4J0E014GHMHG8?4>86@<@48B8?@?DL05@B4KDGDD0LL=8H07L$000@2@@00
0E40L70=LLH@090D<@<0HA03070G<80J@@004880HA0@HF@JLC@68<LFDO4GD=8@0
G@8H9DF8K4C06L=@KHJ@B4;<;L40<0B89DMHD@B4:<LH9<38F8O05H=HKHB0=D1@3
@208480A0A0248<4@MDJ<BLHLI4B@>HK49<LHI<MHB8;4C44DAH<H3<6<B4K@4D><
3<H@D014<DNLL0@@CH=<NLK4IDKDADLH38C@7054H<LL28C<I018B<146DFLI01@3
<KDH@@D9@K4O0KHB4BH9@50I<L04HN@;@KD<<<<4H1@68I014<DFLJ0@@C8;<<HCH
38ADC060B0C81@C@D09<<86@H<6H6HL4809@M0G82DN01L$000@80A0H044088@0<
0D4080LHJ0BL8L>LJ8I0549<G<M@DDLL3H70=LLH@090D<@<0H10346D80H000:4L
<0HA0C0<@EL74<DIHDHC41@207080J0I094NH34N<@HIDC<78>83<?8AH8@J<@@N0
4D1D;4?@2L6L=LI06H0H1HA0D04DLD4HJ@K@<8><2LK0@0A4A<:8K@?8N<CHC4FLA
<24D<4H@@KD1D7474L07@6D3<70<4>0:L1@C0F46DB@;D6D2<?8EH5H><6<<@48G8
78=@<H2<H85H@41464BLI@A@18<HL@8@:HOHCD>0MH4HC4:0:H7HL@;@;D@H8<3@6
8B4K@7@48BLG0C4>4B<I@70H@@HI@F0289D107<4@4HN@3@G8KL>848@<HH?<1<E<
08OH04$000@80@0O@60LH1DC<6L>DL@@0900<080HA00H18KDN4H<CD6@>8I8?@94
8<2HKLHDID3<F8AD@40<48101024648@J86H?D?4C@7@=4BLGD<@6H>0KHI@ED083
D6@80I@C004880HA0C0G030LHB@74C<KH=46<2<J<2L=85H@4147DBL?HD0A4M@2H
C@4DMD4HM0G8DDLHA8KHJDH0@<F8=H@H1D<048G8FD7H9<I8ADC8I<D08H9@10G<5
8HH9@M0G4=<<HM4B<140LO<K00@;DJLJ0@0346H8HBD<DK0904HB@941H4LJ@K@G8
CL>L6DL03L$000@80H000J4800410B0?8C0:<LHI@3@20=4>@I000240<H@9D9@CL
64=LK0G@E44<FLD4G0<8>LJ8I054N<4D1D;4?@2L6L=LI06H0H1HA040408@L0209
4K<N@LD>4N8D@;DNHB8K4H0?43<3LJ40084F<I@NLI@G014@<;<=@88K45D64<H88
IL6D6<I<N09<8@JLL0=@:@9DN0>DIDI@BDGHG<J4BD2H@<4H105<MHLH?HD<@4><?
4D8G48L4HJ@KD2<2<?8MH5D4<74L4:03@9@90F<5D0@;D6<6<L@188H4@1HAL;<04
OL$000@80@0I@<41LA00H18NDK@0<LLID3@20=4>@J000840<0LA0C07D7480H04@
?<ID54><6HID<@@0M@A464B<M@6<LH1DC<6L>DL@6H2@:LM@9H3874<DGHD@44A<M
LL8LH1DK4HHH004240@@@A030648@J87H?D?4C@9@=4:L>@JLBH@43860B4;D;<6@
=0<8O8@8D<=<>LL<98ALG<:4;@<<N<4H6L?LI0C0?49420>H;DI@?0201HG4I@E01
4<DJLH0@@CH=<<H8HEHE0EHH4343<@8EH=<H<9D68<L?L<@@@0H<4@DIDA@GLF4<@
94F8@L9DE0543@N01L$000@80@0>0N<@H9@C45L>0800@0444480H1@24403850=@
=81H?D?4>@4LADC@F8F@I<;H?8MH@4N<<H1HA06@78=0@0E0640<<@9LA@C@KD<@E
L74<DIHDHC41@20703<>DB<M@6<LH1DC<6L>DL@6H0@0@9@F8=488O0B8@H5@GH5<
B@;D:<><6LI0D0A4A<B<G8FH4L@H9@10G<4H4LN@K@G8KL<H4858G@7H<898?<50I
<24@8EH5H=468BL4L68O<J@0@;DBLK0K@?<6@<848F<M<I8HLN@@DC8;<>088ID5D
6LH<FDE0=H1DG<K@A@C<>088K09D6L44LH4HC<:D4H6<688D:L;H9H2@LD0<OH04$
000@L@@0900<080HA00H1880@0J@H<CD6@>8I8?@948<2HKLHDID3<F8AD@40<481
01024708@J86H?D?4C@7@=4BLGD<@6H>0KHI@ED083D6@80K0E@F83440<@J@0024
B<M@6DDLI@K46@B<0408<L8<64?DHHG@<4N<DH5HM0G4FD5@:LAHID;DA@M0JHO8A
8A41438=8=HD4147DFLBHE@306D>4:4A8;<M<0<<L94AL:@<H88;4@HB0><JDI@G0
I84HD8E<H<6H6@H4:L@H:4L<=H8D4D64C4J0<HC<C8J0><I<1@206L<480@@30708
4JLDD:4A8A@C<C05004OL$000@80I@54><<H1HA06@78<@@0M@A4040<8@0<0D408
0M8<4I@3<6H=LM8I0=D10909@B<7<=4L@B@O4B8@H5@GHA<C<6L<@3<0<0L8@2020
48<@A0D@=DO8N870?4J85H?<I4=@L0G@ADAL=0@0F0<4><?LI4B0A4A<B8G84D0HA
0386D84K05D6<K<I0G40LJ4K@@8F<L4L0E<M@68;<68<@K08@:HNH98B<14<4FLI@
@@CH;<<HBHB4C<70<D@<D<KL>8CHC8A@C@I0M8E@EL306@84@DC<<DB<H@ID3@78:
<I8J0D4B<HHMDD4=<9<H8049DM8F0=D80J<O8544<2LJD=H9DAL?H7L<870F0F8L0
:0I40<2LD4A<BD60=@M86H9DMH0HA8O404@H1<3064>4H86<<D=@ODBDFD>H3<6<6
<388HB8@8B478=HHH3@54L<2HJDF<@0?L$000@C8G@44:<0H8@382064806@:0000
8D@3HEH@@F4K<4@7478=0@0F0:4L<0HA03860ML0DB<M@6H4D9LC<6H<DM0I0I4?<
4H5D64G4:@>4B<@HIHK@8HM0B0?46DC4F@9L;L3H7DC46<4H1D3<6H=LK<?40<DL5
@MDFHBLI@1LI8K<L@<H6<G4LDK@BL<D0@4HIH4D:HH8F0E4:<JH0D<8K@G@JD9@KH
B85H98D<6L:H4HC@9DOD4D6@HH8@N@0LB460>@H83H8LA@C8F4N@I<4<@034OLH0J
@:<9@7D981<C89024;D?44<@LI@B468=HB4ED;LL4M0B@B49<N@HH>HML94G8N8J8
2HA8707<LH<04@AD;<>LI4B44<4LK4BLO8B8K8D@<HF@E4EH4LB@9<I<:0B4:<@L1
H3858<4H@F08DJHB4B06L=LK02@H40<8L1HA040408@A04@O<6@146<<L5DF86@C0
G@74B<<H9@J0;DBD8L=LD4A838DLG4<4EHKD;@68<@H@6@KD28>@K@6<@@IDC<64=
<@DM064G8<@0DML547@?0F48LA@E<84D<=@54;06<0L=8KD2494<<2LJ4N0F8G4B8
HH1DC46L>LB8G064N<:H1828@H3LK<LLG06L=H8<=46@ADHL<<A8ADC40D?4JL1D2
05D=8J0=@;81<386L>06H880HI@?4MHLHJ<FD;H3L6H=0?HI<:4B<O8:0H85D7L><
M00HL42408HDH4I@>8;4OHALNH:@14DH8L54G040J@4@O<6DE4H<FH706@54G<18K
D5DLHG@8<B<=@3LA@0LO@0<$000@AHB@>40<48ADAH3440>8@0B0440<8@1@201D2
@@000C40<B<6L<LJ8A@14L84H1@C<7@?8I8I08D5@808D9H3D78=0E0@@24H<DHE@
G<IDH@>H2<N8@HE@NHH4K4G0C4<@3L4<>DK@A@<D7LK0H@<@J4:LFLNHH<C@6@><E
@FH:DDLI@;@M4FDBLI0MH9D3D74=4NL7HOLA4IHAHA8A@2474<DL8@0E@EL3060<0
H08@M<:@HD9D38G8BDBHBHN@?@ALB<78=DB0@@B4J<NH5H74I45H:HI<3LCD54<<H
8HH;@40645484842<<H9HC4E8;D<@N4?DC0D@>4:<LHA0C@60>0J0D8ND>8389D0D
4D;<N@LD:4B044<4HDN0E04HC088FL8@J0<D6<48NH<DM<<<88ELAL6L>074AL685
<<848FHLH=@<H<8?8KD54:<0H1HBD7@>024>@G0M8H@B@B4;<D<ND=434L<8@A<:4
509HB@M<B0604<JHC@@LB@8H5L88D0:@@D>@8@4@IDK@<8;084J8G@>41<5@E8I49
0A@4L>H3<<@8@4H38FD>8M<KD0HH<4D0HELD45DND=898;<6H<4B060L03L$000@L
@J06448DL9@3@20>880H@00J4800410B0?8C0884LE@NHE4L84H1DCD7440J8@0@0
A4=<NH0H5HLL:4<H8D9@H@JHC@ID9@9@EL7<<DI8H0D4B80L9H;4?@>89HM8F@24:
<8H=HADJH<L>8E@=@9@5LE<1DD06<<D9@30FHI42<LLGH6L>DL@A@=D8@:0=@88=L
I048F@B0:8HH5@;82LE04D1HM8?H5@=<=D1<BH7@:DLHB@44A<>L4<EH7L@8CLFDI
<B468=HM<4D=@84482L2L:D;L3H84EDDL60=DI8J07DJ4M0B@NHK<9<4H6@L@9D3<
70=LE<H81D;D0@BL><JH105H9D;LN<MH@8A<J8E0A03<F8A0=DB8G0344<2LILJ8C
8EH;DA<LL;L4@0D243428HH9D306H?4LHD@8DD01<58:8@8704D;<<<L81<188LCH
<DID=D<<JLH42<70>@J82H60><I4JH30NDNH:@9468N@E@<@L8?8;88L:@J8F@54A
<6LE8284@6L>8040<4HHHJ<O<N<HH44<D6@4HJD<H:0KHD@>48<2LA4>0A4C@AD4@
5D<0J@H@6D=<280H5L3@F498=LG@D0EHCHG8HDJ89058G4<8G8:<I8ADM@KHH8DL?
818FH:4@8@@1<D@H800>804OL$000@80@0N@<418CD6L>0A@I0542<DLA8C<6@>@L
H@0900<<80HA00H18DD>DG8KD54:<0H1HBD7@>0I8KH144HEHB<B<78=DH@B@B4;<
GDNDCD;@<8H0H@>HF<K84078:<HH@@<4C<?@<8B8CDO8N8C8AHE0I014L<<HAHK4K
868:8HLID3078=4KHG0DDHDNHB8K44@>46<LD9D3D74<<5<4L50IH5<:HKHF0D42<
LH5@88309HKHB08D504@DDA@;4F@5H9LM8J08DA<BHG814=80D54D<FD8@G@8D>D<
<B89<A89L7L7DAHD8ND:0A8JH<<54K@BH38;888L@B@>48<2L5L<094K@H05D6894
K8H0548<4HA@C<F410G@G@94L4M4<H4@AD3<F864IL;@?@H0M43<<<D<6H28N8@H1
H;8;@;<E8A0E44D<09H3878=4M@NHLD8D:D58K0>0<41LB4D410I8?4;<B0GD>43<
4D<<1<9D5D4<>8M00HJD80I0HDJDDL?D34:4F4C458;@9@3H<D:HH@8@=@AD10I<<
4@0JD60H4<8<@;09<8DJLF@J0ELE4D4HDA85D78?H78DH4L<HD@J@>4C<E0<@B8ED
E0IH3@>8IDO0@D8<9DA@8<A<3L;4>47LL03L$000@80@0J@0<B46@><M0I0944<DH
1HCD6@=LK@@0900<080HA00H18G4BDB<6L<@I8@010A8=<84<@90306L<4K0L@C4;
<B<O0;8:@D@0@>498FHA894FH18188L3H>83<K0C068=HM07@@43<GLID4D;<MD4D
KL7D:DB81@7D5<C4G03H:<M0@@B48<@L98C8FHHD8L5H5HJ8>@?80<BL3<G4@0042
<L<M4OD?4L<?8500<DLI8C@68<@N4CHJL<H:0KHD@5DC4FH0@9@D@LHI4O4=0<8B@
=404D<4HEH;4B<60?0L4A0:D?84L;L;@CL40>DA<<D38IDBD;@64KDO8<8<@NL2H7
HJD;<:<8HL@B@A4A<284@MD:@HD9D38G81008EL98LH?@I8E@A0A4K@C@F<C8A4MD
>HDL=@B4D4B80L9H;4B@90C@J@=44<DHA@;@C<K0:8HD6DF<K82078:<HH@@<4:<2
H0HL<J<24BD68=D5<@0C@60>@M8BH=H@L9DA<<<N@CDD86HLH:HB0>42<KLE0A03<
F8A0=DB8G0344<2LEL<04LM<80440<1L>4=4<8L4444H9L<00<3H08OH04$000@E8
I@548<0H8@382060806@:000084@3LE0D@=4:<0HI8C<6@=HM0I@GD:D1@C090IDD
HJ0540<0L@@K@0HBD=404D<4HEH;4B<60?0J<3<6D:HM4CD?@>4?D@8J@D4N<6HAD
LH98EHC0=H?DA4:DB044=LL0J094N<HHID;@F8KD;H;@H8:D248H1H3D4<>8I8H@8
D14B8>HE8L84HED9DA8>D><?D:L=0IHDLI@A8C0I0ID74E<C4K0=H>LI82H3458?4
L0B@8DA4H@94CD6H<8I8I0FDA45D:D;@6<E<1DD46<<D9@306H<D<4607H3D:4B42
<FHH098:<HH1D;D;82DD<B<5894@HCH@89@F8D<1D3DMHK@L830?LHHF8K@HH0D1@
C030CL685<D8>4587@N@1@1LODH888ELI0N@142<7D70?48<DH5@7@1@B48H5L@84
04<94L8I83<74><M01@14;<L4:44D84LD1DC<F81<HLK0E034<<J4O0G0H@L8D838
;88L=@H8J08DN0042D6@>8A<1LK80HB4HDC<@D=0K4>82<@H9DCH74=4241040505
@ADH42@5404OL$000@80@0O@60@DIH3<708HL@B@A4:<HD9D3878><80D@04640<8
@0<@D=HE@KDMHB@540<@L983H70<DML0@2<JLI494CD6H<8I8I0EDKHO89H5H64<0
<8G<;4=D20CD54<<H8F09D7H64I49H?D?45D<<K43@B42<0H1HK8;898L8HHI@;<5
4FHBL<H680DIDC<7<=H94KL9<2H:<J8F@E4H<4H1@CD6@=LK@7@@4C<I<;@B@A@1<
I468;@>4=HHHBH7HG4JDL4B8N0=8MDF@54N<<DMH6HGH9LA@685D<0L0D@CDH8A0=
D>@9D=8C<3068=4C<64=0IH28=D=028=DI<@8KD><B@B@6444DH6<=D4<D<4HMD8<
DHA@C460<@J<2@JL<45H88HL0@;D><60<0H04@<8G@I<;DD@5H<LK8D@>4A<L86@7
0=4M@I054I<9428FD=L9<;0B@<02874<4K8H0AD18>4KH7@?LEDAD9D88IH3@6@>D
K@J0>D285<943L2H2@=D<<4@346LA41H=HKHF@HD>LB0E<24283DM@G0DDCH@<<4B
<E0J<4H1@;H=498I0@H1HK8B8;4DHGHK0EDODO0=@@H9<D8B<C06L<@I8?@>4:<DL
ID2L70=LJ8G0D4A<@08L<4M8BHELELAH24@<DL=4N0DDA@C<60<8>450842L6D@D7
8=4HHKHB4602@C46@><L0F014B<LLI<3<70>@7494:830A<=<74B4B<LHI@C468>8
N4I4:HG074>@F4EDA4;H=HKH:H8HK088:83<L<I0@49DC86H=4M0L8G8G@5D6@I<B
@C45L=DI8F@?44<4L5LIHNH2<;<3068?48LBD60>@F420>8BLA@5DA8H<?D;@2LF<
JD6LFH3008OH04$000@@81@04B40H0@1@201D2@@000C4@<CH68>8KH?@94L<4H1D
CD5L<<KHG044A<=<8D4L9DC<68;LLHJ0540<NL?H<@I8L0GD2L9DK8G<NH=<5H=@7
DJHJ8K@K<H@@094<@28HH9D306H;LH8J@D4N<2HBL2@K@DHI@EDN8;8O0:8FH98GH
G@64;<64<<L@B@=D34:L<89H;014KD64J86H=HM8F@O408LL=DM4D0A<2060?8ODE
D<84LA@;0K<FD?@FHA01<68GDB47<CD=4;<?H=4K88@K<@8@D9D9@G@=L=L44N<2H
6D>43D=0KH848H9D9@0LC<K0@@K8@@H4:<HH1HKDI02@I4KL8@MLD@08B<1@O<9H=
LL0@@<41<8<EHJ8;<3DA0MD4@6LM@4@B<FHB06<0L9D3D6L>@74:488<4><L@A@8D
J<9<C064<<M0L8I8A0I4;<=HLHL8?4LHID2<7094JDLL4@0DI0I48<LDIDB06L=D=
<JL14B8A85@0<<DIH9H?D<DC8B@D4@<LH1D;468DDGHK47HOD1<O00L$!4be11382