| *--------------------------------------------------------------------------- |
| * SPDX-FileCopyrightText: 2020 Efabless Corporation |
| * 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. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| *--------------------------------------------------------------------------- |
| * Threshold test for POR circuit |
| * Determine gate voltage at which the HV NFET draws 240nA nominal |
| * |
| * Result: 0.7575V |
| *------------------------------------------------------------------- |
| |
| .param mc_switch=0 |
| .lib /usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice tt |
| |
| *---------------------------- |
| * Testbench circuit |
| *---------------------------- |
| Rtest vdda mir1 1MEG |
| Xm1 mir1 vin vss vss sky130_fd_pr__nfet_g5v0d10v5 w=2 l=0.8 |
| |
| Vgate vin vss DC=0 |
| Vpwr vdda vss DC=3.3 |
| Rgnd vss 0 0.1 |
| |
| *---------------------------- |
| * Testbench control |
| *---------------------------- |
| .control |
| * DC sweep from 0.7 to 0.8V |
| dc Vgate 0.7 0.8 0.001 |
| wrdata test.data Vpwr#branch vin |
| |
| .endc |
| |
| .end |
| |
