Multisim中LM386构建所需地LM386.sym和LM386.cir

标准文档

将以下内容粘贴至文本文档，另存为LM386.cir 即可 * CONNECTIONS: Gain 1

* | Non-Inverting Input * | | Inverting Input * | | | Gnd

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标准文档

* | | | | Vout * | | | | | Vs

* | | | | | | Bypass * | | | | | | | Gain 8 * | | | | | | | | * 1 2 3 4 5 6 7 8 .SUBCKT LM386 g1 inn inp gnd out vs byp g8

* input emitter-follower buffers:

q1 gnd inn 10011 ddpnp r1 inn gnd 50k

q2 gnd inp 10012 ddpnp r2 inp gnd 50k

* differential input stage, gain-setting * resistors, and internal feedback resistor:

q3 10013 10011 10008 ddpnp q4 10014 10012 g1 ddpnp r3 vs byp 15k r4 byp 10008 15k r5 10008 g8 150 r6 g8 g1 1.35k r7 g1 out 15k

* input stage current mirror:

q5 10013 10013 gnd ddnpn q6 10014 10013 gnd ddnpn

* voltage gain stage & rolloff cap:

q7 10017 10014 gnd ddnpn c1 10014 10017 15pf

* current mirror source for gain stage:

i1 10002 vs dc 5m

q8 10004 10002 vs ddpnp q9 10002 10002 vs ddpnp

* Sziklai-connected push-pull output stage:

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标准文档

q10 10018 10017 out ddpnp

q11 10004 10004 10009 ddnpn 100 q12 10009 10009 10017 ddnpn 100 q13 vs 10004 out ddnpn 100 q14 out 10018 gnd ddnpn 100

* generic transistor models generated * with MicroSim's PARTs utility, using * default parameters except Bf:

.MODEL ddnpn NPN(Is=10f Xti=3 Eg=1.11 Vaf=100 + Bf=400 Ise=0 Ne=1.5 Ikf=0 Nk=.5 Xtb=1.5 Var=100 + Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=2p Mjc=.3333 + Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n + Tf=1n Itf=1 Xtf=0 Vtf=10)

.MODEL ddpnp PNP(Is=10f Xti=3 Eg=1.11 Vaf=100 + Bf=200 Ise=0 Ne=1.5 Ikf=0 Nk=.5 Xtb=1.5 Var=100 + Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=2p Mjc=.3333 + Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n + Tf=1n Itf=1 Xtf=0 Vtf=10)

.ENDS

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