| * 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 |
| * High Density 3-terminal Vertical Parallel Plate Capacitor |
| * Layout: sky130_fd_pr__cap_vpp_02p9x06p1_m1m2m3m4_shieldl1_fingercap2 |
| .subckt sky130_fd_pr__cap_vpp_02p9x06p1_m1m2m3m4_shieldl1_fingercap2 c0 c1 b |
| + |
| .param mult = 1.0 |
| + |
| + ctot_a = {12.65e-15*sky130_fd_pr__model__cap_vpp_finger__cor+0.0283/sqrt(mult*2*6.1*2.85)*12.65e-15*sky130_fd_pr__model__cap_vpp_finger__cor*sky130_fd_pr__model__cap_vpp_only_p__slope} |
| + c0_sub = {1.225e-15*cli2s_vpp} |
| + c1_sub = {0.712e-15*cli2s_vpp} |
| + rat_m4 = 0.125 |
| + rat_m3 = 0.125 |
| + rat_m2 = 0.375 |
| + rat_m1 = 0.375 |
| + cap_m4 = {rat_m4*ctot_a} |
| + cap_m3 = {rat_m3*ctot_a} |
| + cap_m2 = {rat_m2*ctot_a} |
| + cap_m1 = {rat_m1*ctot_a} |
| + lm1 = {6.1-0.96} |
| + lm2 = {6.1-0.96} |
| + lm3 = {6.1-0.96} |
| + lm4 = {6.1-0.96} |
| + wm1 = 0.160 |
| + wm2 = 0.160 |
| + wm3 = 0.300 |
| + wm4 = 0.300 |
| + nfm1 = 9.0 |
| + nfm2 = 9.0 |
| + nfm3 = 5.0 |
| + nfm4 = 5.0 |
| + nvia3 = 5.0 |
| + nvia2 = 5.0 |
| + nvia = 5.0 |
| ccmvpp_hd5_atlas_fingercap2_l5 a2 a1 c = {cap_m4} |
| rsm4 a0 a2 r = {rm4*lm4/wm4*(1/3)*(1/nfm4)} |
| rvia3_0 a0 b0 r = {rcvia3/nvia3} |
| rvia3_1 a1 b1 r = {rcvia3/nvia3} |
| rsm3 b0 b2 r = {rm3*lm3/wm3*(1/3)*(1/nfm3)} |
| cm3 b2 b1 c = {cap_m3} |
| rvia2_0 b0 c0 r = {rcvia2/nvia2} |
| rvia2_1 b1 c1 r = {rcvia2/nvia2} |
| rsm2 c0 c2 r = {(rm2*lm2/wm2*(1/3)*(1/nfm2)+rm2*lm2/wm2)} |
| cm2 c2 c1 c = {cap_m2} |
| rvia_0 c0 d0 r = {rcvia/nvia} |
| rvia_1 c1 d1 r = {rcvia/nvia} |
| rsm1 d0 d2 r = {rm1*lm1/wm1*(1/3)*(1/nfm1)} |
| cm1 d2 d1 c = {cap_m1} |
| cm12b_0 d0 b c = {c0_sub} |
| cm12b_1 d1 b c = {c1_sub} |
| .ends sky130_fd_pr__cap_vpp_02p9x06p1_m1m2m3m4_shieldl1_fingercap2 |
