A1.2.1 Car Buzzer Circuit

Components used

SPICE netlist

* **************************************************
* Generated from CircuitSim Schematic
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V_DG1 N6 0 DC 5
X_LED1 N8 0 LED_VIRTUAL_b2f33485 IS=1e-14 N=1 RS=0 CJO=0 M=0.5 VJ=1 BV=1e30 IBV=100p OnCurrent=5m
R_S1_NC N1 0 100u
R_S1_NO N1 N6 100meg
R_S2_NC N3 0 100u
R_S2_NO N3 N6 100meg
R_S3_NC N4 0 100u
R_S3_NO N4 N6 100meg
X_U1 N1 N2 INV VHIGH=5 VTH=2.5 RiseDelay=1e-9 FallDelay=1e-9
X_U2 N2 N3 N5 AND2 VHIGH=5 VTH=2.5
X_U3 N5 N4 N8 OR2 VHIGH=5 VTH=2.5
APROBE_PR1 [N8] [d_PR1] AMODEL_PR1

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* Models and supporting definitions follow
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* LED source-variant replacement with current-sense brightness node
.subckt LED_VIRTUAL_b2f33485 T0 T1 IS=1e-14 N=1 RS=0 CJO=0 M=0.5 VJ=1 BV=1e30 IBV=100p OnCurrent=5m
    DLED T0 SENSE LED_VIRTUAL_b2f33485_DIODE
    .model LED_VIRTUAL_b2f33485_DIODE D(IS={IS} N={N} RS={RS} CJO={CJO} M={M} VJ={VJ} BV={BV} IBV={IBV})
    VSENSE SENSE T1 DC 0
    BLIT lit 0 V = { (i(VSENSE) > {OnCurrent}) ? 1 : ((i(VSENSE) < 0) ? 0 : (i(VSENSE) / {OnCurrent})) }
.ends LED_VIRTUAL_b2f33485
* Generic digital inverter (NOT gate) with normalized propagation delay
.subckt INV IN OUT VHIGH=5 VTH=2.5 RiseDelay=1e-9 FallDelay=1e-9
    BTARGET TARGET 0 V = {(V(IN) > VTH) ? 0 : VHIGH}
    GDELAY STATE 0 VALUE = {(V(TARGET) > V(STATE)) ? (V(STATE)-V(TARGET))/(((RiseDelay > 1e-15) ? RiseDelay : 1e-15)/(0.69314718056*1e-9)) : (V(STATE)-V(TARGET))/(((FallDelay > 1e-15) ? FallDelay : 1e-15)/(0.69314718056*1e-9))}
    CDELAY STATE 0 1n
    BOUT OUT 0 V = {(V(STATE) >= VHIGH/2) ? VHIGH : 0}
.ends INV
* AND 2-Input gate, ideal behavioral
.subckt AND2 A B OUT VHIGH=5 VTH=2.5
    BOUT OUT 0 V = {((V(A) > VTH) && (V(B) > VTH)) ? VHIGH : 0}
.ends AND2
* OR 2-Input gate, ideal behavioral
.subckt OR2 A B OUT VHIGH=5 VTH=2.5
    BOUT OUT 0 V = {(V(A) > VTH) || (V(B) > VTH) ? VHIGH : 0}
.ends OR2
.model AMODEL_PR1 adc_bridge(in_low=3.3 in_high=3.3)

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* Simulation settings
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.options rshunt=1e12
.tran 1e-5 1e-3 0
.save V(X_LED1.lit)
.end