* Copyright 2020 The SkyWater PDK Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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* limitations under the License.

* SKY130 Spice File.
.subckt  sky130_fd_pr__cap_mim_m3_2 c0 c1 w=1 l=1 mf=1
.param wc = 'w+m4_dw*1e6+tol_m4*1e6'
.param lc = 'l+m4_dw*1e6+tol_m4*1e6'
.param via4_spacing = '(0.28+0.31+0.140)*(0.28+0.31+0.140)'
.param num_contacts = '(wc*lc/via4_spacing)'
.param r1 = 'rm4*(lc)/(wc)'
.param r2 = 'rcvia4/num_contacts'
.param vc1 = -25.0e-6
.param vc2 = 90.0e-6
.param carea = 'camimc*(wc)*(lc)'
.param cperim = 'cpmimc*((wc)+(lc))*2'
.param czero = 'carea + cperim' dev/gauss='0.01*2.8*(carea + cperim)/sqrt(wc*lc*mf)'
c1 c0       a 'czero*(1+vc1*(v(c0)-v(c1))+vc2*(v(c0)-v(c1))*(v(c0)-v(c1)))' tc1 = 0 tc2 = 0.0
rs1 a        b1 'r1' tc1 = {tc1rm4} tc2 = {tc2rm4}
rs2 b1        c1 'r2' tc1 = {tc1rvia4} tc2 = {tc2rvia4}
.ends sky130_fd_pr__cap_mim_m3_2