Solid State Devices

* 11 Stage Ring Oscillator Circuit Model

XX1  osc_out N001    VDD 0 cmosinverter

XX2  N001   N002    VDD 0 cmosinverter

XX3  N002    N003    VDD 0 cmosinverter

XX4  N003    N004    VDD 0 cmosinverter

XX5  N004    N005    VDD 0 cmosinverter

XX6  N005    N006    VDD 0 cmosinverter

XX7  N006    N007    VDD 0 cmosinverter

XX8  N007    N008    VDD 0 cmosinverter

XX9  N008    N009    VDD 0 cmosinverter

XX10 N009    N0010   VDD 0 cmosinverter

XX11 N0010   osc_out VDD 0 cmosinverter

*netlist

.subckt inverter In Out VDD DGND

M1 Out IN DGND N_0.18u 1=180n w=0.5u

M2 VDD In Out p_0.18u 1=180n w=1u

.include "Mosis_tsmc_180nm.model"

.ends cmosinverter

.model NMOS NMOS

.model PMOS PMOS

.lib C:\Users\jgazzara\documents\LTspiceXVII\lib\cmp\standard.mos

*sources

VDD VDD 0 DC 3.3

VinA A GND dc 0 pulse 0 3.3 0ns 0.1ns 0.1ns 25ns 50ns

*commands

.ic v(osc_out) =1

.tran 10p 10n UIC

.backanno

.end