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U110ΩRin1V1msVin001PR21N4148DVoutPR1Vout2 V V
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ID:

ID:

x10
x0.1
Sheet:1
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SPICE
SPICE Netlist

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** log op-amp **
*
* Multisim Live SPICE netlist
*
*

* --- Circuit Topology ---

* Component: D
dD 2 Vout 1N4148_2_D

* Component: Rin
rRin 1 2 10 VIRTUAL_RESISTANCE_Rin

* Component: U1
xU1 0 2 Vout 3T_VIRTUAL_U1 PARAMS: VOS=0 IBS=0 IOS=0 AVOL=200000 BW=100000000 RI=10000000 RO=10 VOMP=12 VOMN=-12

* Component: Vin
vVin 1 0 pulse(0 {1+0} 0 {0.001-0.0005} 0.0005 0 0.001)


* --- Circuit Models ---

* D model
.model 1N4148_2_D d (
+ IS=6.89131e-09 RS=0.636257 N=1.82683 EG=1.15805
+ XTI=0.518861 BV=80 IBV=0.0001 CJO=9.99628e-13
+ VJ=0.942987 M=0.727538 FC=0.5 TT=4.33674e-09
+ KF=0 AF=1 )

* Rin model
.model VIRTUAL_RESISTANCE_Rin r( )


* --- Subcircuits ---

* U1 subcircuit
.SUBCKT 3T_VIRTUAL_U1 in_pos in_neg out PARAMS: AVOL=500k BW=10Meg RI=10Meg RO=0 VOS=0 IBS=0 IOS=0 VOMP=15 VOMN=-15

* Input Stage: Rin, Ibias, Voffset
VOS in_pos 4 {VOS}
Ibias1 4 0 {IBS}
Ibias2 in_neg 0 {IBS}
Ios 4 in_neg {IOS/2}
Rin 4 in_neg {RI}

*Middle stage: Gain, frequency, voltage limiting
Bgain 0 6 I={v(4,in_neg)*AVOL/1meg }
R1 6 0 1meg
CP1 6 0 {AVOL/(2*pi*1meg*BW)}


Vpos 9 0 {VOMP}
Dlimit_pos 6 9 d1

Vneg 10 0 {VOMN}
Dlimit_neg 10 6 d1

.model d1 d(n=0.1)

*Output stage: Buffer, output resistance
E2 7 0 6 0 1
Rout 7 out {RO}
.ends

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log op-amp
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Name

Start time

s

End time

s

Start simulation

Mode

Threshold voltage levels.

Threshold voltage values used in the logic evaluation. See Digital Simulation for more information.

Output low

V

Output low voltage.

Maximum output voltage level to produce a low signal.

Input low threshold

V

Input low threshold voltage.

Maximum input voltage level for the signal to be considered low.

Input high threshold

V

Input high threshold voltage.

Minimum input voltage level for the signal to be considered high.

Output high

V

Output high voltage.

Minimum output voltage level to produce a high signal.

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