| * 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. |
| * statistics { |
| * mismatch { |
| * } |
| * } |
| * 4-terminal Vertical Parallel Plate Capacitor /w LI-M4 fingers and M5 Shield |
| * 3-terminal Vertical Parallel Plate Capacitor /w LI-M5 Shield |
| * This is the ~12fF fixed capacitor model |
| * Layout: sky130_fd_pr__cap_vpp_04p4x04p6_m1m2m3_shieldl1m5_floatm4 |
| .subckt sky130_fd_pr__cap_vpp_04p4x04p6_m1m2m3_shieldl1m5_floatm4 c0 c1 b m5 |
| + |
| .param mult = 1.0 |
| + |
| + ctot_a = {10.778e-15*sky130_fd_pr__cap_vpp_04p4x04p6_m1m2m3_shieldl1__cor+1.03730/sqrt(mult/0.35078)*0.00731*10.778e-15*sky130_fd_pr__cap_vpp_04p4x04p6_m1m2m3_shieldl1__cor*sky130_fd_pr__model__cap_vpp_only_p__slope} |
| + cli2s = {1.840e-15*cli2s_vpp} |
| + rat_m3 = 0.1636 |
| + rat_m2 = 0.4604 |
| + rat_m1 = 0.3318 |
| + rat_m12li = 0.0442 |
| + cap_m3 = {rat_m3*ctot_a} |
| + cap_m2 = {rat_m2*ctot_a} |
| + cap_m1 = {rat_m1*ctot_a} |
| + cap_m12li = {rat_m12li*ctot_a} |
| + cm5_c0 = {7.39e-16*c0m5m3_vpp} |
| + cm5_c1 = {2.63e-16*c1m5m3_vpp} |
| + lm3 = 1.50 |
| + wm3 = 0.30 |
| + nfm3 = 10.0 |
| + nvia2_c0 = 32.0 |
| + nvia2_c1 = 13.0 |
| + lm2 = 1.585 |
| + wm2 = 0.140 |
| + nfm2 = 28.0 |
| + nvia_c0 = 40.0 |
| + nvia_c1 = 18.0 |
| + lm1 = 1.665 |
| + wm1 = 0.140 |
| + nfm1 = 20.0 |
| + nmcon = 42.0 |
| ccmvpp4p4x4p6_m3_lim5shield m5 c0 c = {cm5_c0} |
| cm5_1 m5 c1 c = {cm5_c1} |
| rm31 c0 z1 r = {rm3*lm3/wm3*(1/3)*(1/nfm3)} |
| cm3 z1 c1 c = {cap_m3} |
| rvia2_1 c0 d0 r = {rcvia2/nvia2_c0} |
| rvia2_2 c1 d1 r = {rcvia2/nvia2_c1} |
| rm21 d0 a1 r = {rm2*lm2/wm2*(1/3)*(1/nfm2)} |
| cm2 a1 d1 c = {cap_m2} |
| rvia1 d0 e0 r = {rcvia/nvia_c0} |
| rvia2 d1 e1 r = {rcvia/nvia_c1} |
| rm11 e0 b1 r = {rm1*lm1/wm1*(1/3)*(1/nfm1)} |
| cm1 b1 e1 c = {cap_m1} |
| rmcon e0 f0 r = {rcl1/nmcon} |
| rliw f0 g0 r = {rl1} |
| cli2b g0 b c = {cli2s} |
| cm12li e1 g0 c = {cap_m12li} |
| .ends sky130_fd_pr__cap_vpp_04p4x04p6_m1m2m3_shieldl1m5_floatm4 |
