BJT or Bipolar junction transistor consist of three terminals. They are base, emitter and collector. It is used for amplification of weak signals and switching operations. It has two types of physical structures namely PNP and NPN. IN PNP, N type semiconductor is sand-witched between two P type semiconductors. In NPN, P type semiconductor is …
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PN junction Diode is formed by joining P type semi conductor and n type semiconductors. Due to diffusion of electrons and holes from P region and N region a depletion layer is formed in between P type and N type semiconductors. This region consist of positive and negative ions. Where positive ions aligned on the …
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This post contains all the theoretical explanations of conductor, semiconductor and insulator, followed by a Mock Test with Multiple Choice Questions . Difference between Conductor, Semiconductor and insulator parameter Conductor Semiconductor Insulator Resistance Low medium High Conductance High medium Low Temperature +ve temp coeff. -ve temp coeff. -ve temp coeff. Current High medium Low Free …
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Hartley oscillator is a type of LC oscillator which is widely used as a local oscillator in radio receivers. Hartley oscillator was invented in 1915 by the American engineer Ralph Hartley. Figure shows the circuit diagram of a Hartley oscillator. It consists of single stage inverting amplifier and L-C phase shift network. The phase shift …
Colpitts oscillator is a type of LC oscillator which is designed for the generation of high frequency sinusoidal oscillations with the radio frequencies. Typically ranging from 10KHz- 300MHz. Colpitts oscillator is designed by and named after an American Engineer Edwin H Colpitts in 1918. Figure shows the circuit of a colpitts oscillator. It consists of …