What are Passive Filters?

What are Passive Filters?: Passive filters are mainly networks using inductors, capacitors and resistors. The classical theory employed was based on the image parameter theory which in turn was based…

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Synchronous Vibrator and Synchronous Chopper

Synchronous Vibrator and Synchronous Chopper: Low dc current may be transformed into a high voltage dc by simple chopper action. Although an inductive type transformation process is required, the out­put…

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Varactor Diode Symbol

Varactor Diode Symbol: A specially processed junction diode that assumes the properties of a variable capacitor (about 5 - 250 pf) when its dc reverse voltage is varied is called…

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What is Electromechanical Chopper?

What is Electromechanical Chopper?: Electromechanical Chopper - An ac amplifier must see ac in order to perform useful work. A fair number of chopping and modulation techniques are available to…

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Chopper Type DC Amplifier

Chopper Type DC Amplifier: A simple ac amplifier Transformer may be used to amplify a dc input through the use of additional circuit component known as chopper. In this circuit,…

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Instrumentation System Block Diagram

Instrumentation System Block Diagram: Instrumentation System - The measurement and control of physical conditions is very important in many industrial and consumer applications. For example, the operator may make necessary…

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Differentiator using Op Amp

Differentiator using Op Amp: A Differentiator using Op Amp circuit that performs the mathematical operation of differ­entiation. It produces an output voltage proportional to slope of the input volt­age. A…

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