Digital_IC_FAEinverter.pdf

Digital_IC_FAEinverterInverter static characteristic

Voltage transfer characteristic Vout/ Vin Input characteristic Iin = f(Vin ) Output characteristic Iout = f(Vout ) Input Logic swing Output logic swing Logic threshold Noise margins
Prof. Gaetano Palumbo 1

Transfer characteristic and logic swing
Vout

V OHmin

A v= -1

OUT=1
VOHmin H IN=1 V IHmin V ILMAX VOLMAX L

Av =

dVout dVin

VOLMAX VILMAX

A v= -1
VIHmin Vin

IN=0

OUT=0

Input logic swing VIHmin - VILMAX Output logic swing VOHmin - VOLMAX
Prof. Gaetano Palumbo

The Logic swing is the lowest
2

1

Noise margin
represent the levels of noise that can be sustained when gates are cascaded (noise in the digital domain means unwanted
variations of voltages and currents at the logic nodes)

Vin2= Vout1
VOHmin H

Vin1

Vin2 = Vout1

Vout2

L VOL