Transistor Cut off, Saturation & Active Regions
August 13, 2016
The below Fig. (i) shows CE transistor circuit while Fig.(ii) shows the output characteristcs along with the d.c. load line....
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Transistor Load Line Analysis
August 13, 2016
In the transistor circuit analysis, it is generally required to determine the collector current for various collector-emitter voltages. One of...
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Transistor as an Amplifier in Common Emitter
August 13, 2016
The below Fig. shows the common emitter npn amplifier circuit. Note that a battery VBB is connected in the input circuit...
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Shockley Diode Working Principle
August 13, 2016
Named after its inventor, a Shockley diode is a PNPN device having two terminals as shown in Fig. (i). This device...
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Optoisolator Working Principle
August 13, 2016
An optoisolator (also called optocoupler) is a device that uses light to couple a signal from its input (a photoemitter...
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Applications of Photo diodes
August 13, 2016
There are a large number of applications of photo- diodes. However, we shall give two applications of photo-diodes by way...
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Characteristics of Photo diode
August 13, 2016
There are two important characteristics of photo- diode. (i) Reverse current-Illumination curve. The below Fig shows the graph between reverse...
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Seven Segment Display Working Principle
August 13, 2016
LEDs are often grouped to form seven-segment display. The below Fig. shows the front of a seven segment display. It...
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How a Multi Color LED Works ?
August 13, 2016
A LED that emits one colour when forward biased and another colour when reverse biased is called a multicolour LED....
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Comparison of Transistor Configurations
August 5, 2016
There are three leads in a transistor viz., emitter, base and collector terminals. However, when a transistor is to be...
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