With respect to op-amp explain the ideal characteristics and concept of virtual aground. Explain how op-amp can be used as an averaging amplifier in inverting configuration. Also draw neat circuit diagrams to - I. convert sine wave to square wave in op-amp. - II. Detect the crossing of zero’s in the generated square wave. -

Mumbai University > Computer Engineering > Sem 3 > Electronic Circuits and Communication Fundamentals

Marks: 10 Marks

Year: Dec 2015

Ideal Characteristics of Opamp:

1. Infinite input impedance
2. Zero output impedance
3. Zero common-mode gain, or, infinite common-mode rejection
4. Infinite open-loop gain A
5. Infinite bandwidth.

Concept of Virtual Ground

1. An Op-Amp has a very high gain typically order of $10^5$ .
2. If power supply voltage Vcc =15V. Then maximum input voltage which …