positive feedback

What is Operational Amplifier? Explain its Characteristics & Parameters

Applied Electronics

Prof. Dattaraj Vidyasagar
February 25, 2022
April 8, 2024
1

An opamp is defined as the high gain direct coupled amplifier, which consists of one or more differential amplifiers with other supporting circuits. The operational amplifier can perform mathematical operations like addition, subtraction, integration, differentiation and comparison.

How Hartley Oscillator Circuit works?

Learn the Basics First!

Prof. Dattaraj Vidyasagar
February 18, 2022
January 1, 2024

In Hartley Oscillator, the combination of L-C is used to produce high output frequency. It consists of one transistor, a tank circuit and the positive feedback to produce oscillations. Its circuit diagram is given below.

How Wien Bridge Oscillator works? Complete working with circuit

Learn the Basics First!

Prof. Dattaraj Vidyasagar
February 18, 2022
January 4, 2024

The Wien Bridge Oscillator circuit is an RC oscillator which uses the basic property of Wien Bridge Circuit. It uses to stage amplifier circuit and leading-lagging RC network, as shown in the following block diagram.

How RC Phase Shift Oscillator works? Complete working with circuit

Learn the Basics First!

Prof. Dattaraj Vidyasagar
February 18, 2022
January 1, 2024

The RC Phase shift oscillator uses common emitter configuration i.e. CE configuration of transistor. It produces 180° phase shift in addition to the phase shift of 180° by the transistor. So we get total 360° phase shift to produce positive feedback.

Introduction to Electronic Oscillators

Learn the Basics First!

Prof. Dattaraj Vidyasagar
February 18, 2022
January 1, 2024

An electronic oscillator is a circuit which can produce alternating voltage i.e. AC voltage from DC voltage like battery. It consists of semiconductor devices like transistor, MOSFET, etc.