Logic Gates
Logic Gates: Overview
This topic covers concepts, such as, Types of Signals, Analogue Signals, Different Logic Operations using NAND Gate & Different Logic Operations using NOR Gate etc.
Important Questions on Logic Gates


The same input signal is applied to both the (input) terminals of a given logic gate.
If the output is the(i) same as the (common) input signal
(ii) inverted with respect to the (common) input signal,
Identify the logic gate/s involved in each case.

Write down the output at for the inputs and

Identify the logic gates marked and in the given logic circuit.

Identify the logic gates marked P and Q in the given logic circuit.

(i) Identify the logic gates marked P and Q in the given logic circuit.

The inputs A and B are inverted by using two NOT gates and their outputs are fed to the NOR gate as shown below.
Analyse the action of the gates (1) and (2) and identify the logic gate of the complete circuit so obtained.

A self-controllable voltage level (svl) circuit and its low-power high-speed cmos circuit applications;

Digital testing of high voltage circuit breaker of;

Explain how voltage levels are interpreted by a digital circuit ?

Draw a labelled graph of voltage versus time for a signal voltage used in digital circuits.






Digital signals have ________ noise immunity compared to the analog signals.


In the given circuit, the input voltages at and could be either or . Use the fact that a diode under forward bias is a short circuit, and under reverse bias is an open circuit. The truth table of the circuit will be that of
