Electronic Devices & Circuits

Transistor Collector Feedback Bias

In Figure, the base resistor RB is connected to the collector rather than to VCC, as it was in the base

Transistor Emitter Feedback Bias

If an emitter resistor is added to the base-bias circuit, the result is emitter-feedback bias, as shown in Figure. The

Transistor Base Bias

This method of biasing is common in switching circuits. Figure shows a base-biased transistor. The analysis of this circuit for the

Transistor Emitter Bias

Emitter bias provides excellent bias stability in spite of changes in β or temperature. It uses both a positive and a

Transistor Voltage Divider Bias

A method of biasing a transistor for linear operation using a single-source resistive voltage divider. This is the most widely used

Testing a Transistor with a Digital Multimeter

Several faults that can occur in the circuit and the accompanying symptoms are illustrated in Below Figure. Symptoms are shown

Troubleshooting a Biased Transistor

Several faults can occur in a simple transistor bias circuit. Possible faults are open bias resistors, open or resistive connections,

JFET Working Animation

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Optocouplers Working Principle

What is optocoupler? An optocoupler is an optical link and it connects two circuits via this link. The optical link

Phototransistor Circuit Example

Phototransistors are used in a variety of applications. A light-operated relay circuit is shown in below Figure (a). The phototransistor Q1