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Zero bias PN junction

Zero bias PN junction: Zero bias PN junction - Here we will examine the properties of the step junction in thermal equilibrium, where no currents exist and no external excitation…

Vacuum Triode, Construction and Working

Vacuum Triode, Construction and Working: Construction of Vacuum Triode - The construction and the schematic symbol used for a vacuum triode are illustrated in Fig. 5.8. It, as the name…

Solid State Modulator/Demodulator Circuit

Solid State Modulator/Demodulator Circuit: A solid state modulator/demodulator circuit is shown in Fig. 14.41. The transformer T is driven by an ac source and couples each secondary connected to the…

Frequency Domain Network Function

Frequency Domain Network Function: As the frequency domain network function is a complex function, it can be expressed mathematically in two ways i.e. using rectangular coordinates or using polar coordinates.…

Testing and Maintenance of Protective Gear Articles

Testing and Maintenance of Protective Gear Articles: Classification of Relay Testing : Classification of Relay Testing are usually conducted to demonstrate that: the relay will operate correctly to clear a…

Potential Transformer Tests

Potential Transformer Tests: The three Potential Transformer Tests are namely, Polarity check, Ratio check and Phasing check. Polarity check: Polarity check in Potential Transformer Tests is performed in the same…

Current Transformer Tests

Current Transformer Tests: Current Transformer Tests are generally mounted in the switchgear when it is delivered to site and may not be easily accessible. The normal tests which are carried…

Bipolar Junction Transistors Articles

Bipolar Junction Transistors Articles: Transistor Operation: pnp and npn Transistor Operation – A junction transistor is simply a sandwich of one type of semiconductor material (p-type or n-type) between two…