* 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
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.

* SKY130 Spice File.
.subckt  sky130_fd_pr__model__parasitic__rf_diode_pw2dn c0 c1
+ 
.param  area = -1 perim = -1.0
+ 
+ ra1 = 4.94e+4
+ ra2 = 130.0
+ rp1_diode = 7920.0
+ wl = {sqrt(0.0625*perim*perim-area)}
+ wi = {perim/4+wl}
+ le = {perim/4-wl}
rdnwdiode_pwell_rf c0     a1  r = {(ra1/area+ra2/(le/wi+wi/le))*(9.82e-01*2-sky130_fd_pr__model__parasitic__diode_pw2dn__ajunction_mult)}
rp c0    p1 r = {(rp1_diode/perim)*(9.6304e-01*2-sky130_fd_pr__model__parasitic__diode_pw2dn__pjunction_mult)}
da a1    c1 sky130_fd_pr__model__parasitic__diode_pw2dn_noresistor area = {area}
dp p1    c1 sky130_fd_pr__model__parasitic__diode_pw2dn_noresistor area = 1.0e-18
.ends sky130_fd_pr__model__parasitic__rf_diode_pw2dn