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CONNECTIONS: Gain 1
* | Non-Inverting Input * | | Inverting Input * | | | Gnd
* | | | | Vout * | | | | | Vs
* | | | | | | Bypass * | | | | | | | Gain 8 * | | | | | | | | * 1 2 3 4 5 6 7 8 .SUBCKT LM386 g1 inn inpgnd out vs byp g8
* input emitter-follower buffers:
q1gnd inn 10011 ddpnp r1 inn gnd 50k
q2gndinp 10012 ddpnp r2inpgnd 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 r4byp 10008 15k r5 10008 g8 150 r6 g8 g1 1.35k r7 g1 out 15k
* input stage current mirror:
q5 10013 10013 gndddnpn q6 10014 10013 gndddnpn
* voltage gain stage &rolloff cap:
q7 10017 10014 gndddnpn 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:
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 gndddnpn 100
* generic transistor models generated * withMicroSim's PARTs utility, using * default parameters except Bf:
.MODEL ddnpnNPN(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 ddpnpPNP(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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