Q1 Pressure Sensor Integrator - Sukhraj Saund

Components used

SPICE netlist

* **************************************************
* Generated from CircuitSim Schematic
**************************************************
* net label +5V joins NET_007::component:node-c03cf90d-03e3-43ac-8faf-640c6ed2591a:99 net-label-pin:node-b8336530-7695-4659-ba35-85a87b1de166:VPLUS::component:node-b8336530-7695-4659-ba35-85a87b1de166:VPLUS
* net label -5V joins NET_006::node:junction-bd2ab8f1-9b43-4b64-ba7e-f14dd3d1e725 net-label-pin:node-b8336530-7695-4659-ba35-85a87b1de166:VMINUS::component:node-b8336530-7695-4659-ba35-85a87b1de166:VMINUS
C_C1 N2 N1 100n IC=0
V_PS1P N6 0 DC 5
V_PS1N N5 0 DC -5
R_R1 N1 N7 1meg Resistor_1d9c8cf9a__R_R1
X_U1 0 N1 N6 N5 N2 OPAMP_RR
V_V1 N7 0 ac 1 0 distof1 0 0 distof2 0 0 pulse(0 105m 0 1u 1u 499.999m 1 )
E_VP1 VP1 0 N2 0 1
E_VP2 VP2 0 N7 0 1

**************************************************
* Models and supporting definitions follow
**************************************************
.model Resistor_1d9c8cf9a__R_R1 r(tc1=0 tc2=0 tnom=27)
* Idealer Rail‑to‑Rail‑OPV mit Sättigung
* Pins: 1 = Non‑Inv (+), 2 = Inv (−), 99 = VCC, 50 = VEE, 3 = Out
.SUBCKT OPAMP_RR 1 2 99 50 3

    * Sehr hohe Eingangsimpedanz (DC‑Referenz)
    RINP 1 0 1G
    RINN 2 0 1G

    * Idealer OPV‑Kern: extrem hohe Verstärkung
    EGAIN NRAW 0 1 2 1e12

    * Begrenzung auf die Rails:
    * VOUT = min( VCC , max( VEE , NRAW ) )
    * Realisiert über zwei gesteuerte Quellen

    * untere Begrenzung (VEE)
    ELOW NLOW 0 VALUE = {max(V(NRAW), V(50))}

    * obere Begrenzung (VCC)
    EHIGH 3 0 VALUE = {min(V(NLOW), V(99))}

.ENDS OPAMP_RR

**************************************************
* Simulation settings
**************************************************
.tran 200u 3 0 200u uic
.save V(VP1) V(VP2)
.end