* ===========================================================
* TL074 QUAD OPERATIONAL AMPLIFIER MACROMODEL (Standalone)
* Fully self-contained SPICE subcircuit, no external includes
* Based on TI TL074 macromodel (Rev. 1989)
* ===========================================================
* Pin assignment (DIP-14):
*  1:  OUT1
*  2:  IN1-
*  3:  IN1+
*  4:  VCC+
*  5:  IN2+
*  6:  IN2-
*  7:  OUT2
*  8:  OUT3
*  9:  IN3-
* 10:  IN3+
* 11:  VCC-
* 12:  IN4+
* 13:  IN4-
* 14:  OUT4
* ===========================================================

.subckt TL074_QUAD  OUT1 IN1- IN1+  VCC+  IN2+ IN2- OUT2  OUT3 IN3- IN3+  VCC-  IN4+ IN4- OUT4

* ========== OPAMP #1 ==========
XU1 IN1+ IN1- VCC+ VCC- OUT1 TL074_CORE

* ========== OPAMP #2 ==========
XU2 IN2+ IN2- VCC+ VCC- OUT2 TL074_CORE

* ========== OPAMP #3 ==========
XU3 IN3+ IN3- VCC+ VCC- OUT3 TL074_CORE

* ========== OPAMP #4 ==========
XU4 IN4+ IN4- VCC+ VCC- OUT4 TL074_CORE

.ends TL074_QUAD

* ===========================================================
* SINGLE TL074 OPAMP CORE MODEL (from TI 1989 macromodel)
* ===========================================================
.subckt TL074_CORE 1 2 3 4 5
* 1: non-inv input
* 2: inv input
* 3: VCC+
* 4: VCC-
* 5: output

  C1   11 12 3.498E-12
  C2    6  7 15.00E-12
  DC    5 53 DX
  DE   54  5 DX
  DLP  90 91 DX
  DLN  92 90 DX
  DP    4  3 DX
  EGND 99  0 POLY(2) (3,0) (4,0) 0 .5 .5
  FB    7 99 POLY(5) VB VC VE VLP VLN 0 4.715E6 -5E6 5E6 5E6 -5E6
  GA    6  0 11 12 282.8E-6
  GCM   0  6 10 99 8.942E-9
  ISS   3 10 DC 195.0E-6
  HLIM 90  0 VLIM 1K
  J1   11  2 10 JX
  J2   12  1 10 JX
  R2    6  9 100.0E3
  RD1   4 11 3.536E3
  RD2   4 12 3.536E3
  RO1   8  5 150
  RO2   7 99 150
  RP    3  4 2.143E3
  RSS  10 99 1.026E6
  VB    9  0 DC 0
  VC    3 53 DC 2.200
  VE   54  4 DC 2.200
  VLIM  7  8 DC 0
  VLP  91  0 DC 25
  VLN   0 92 DC 25
.MODEL DX D(IS=800.0E-18)
.MODEL JX PJF(IS=15.00E-12 BETA=270.1E-6 VTO=-1)
.ends TL074_CORE