HARTLEY OSCILLATOR

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 …

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COLPITTS OSCILLATOR

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 …

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Wien Bridge Oscillator Explanation

The wien bridge oscillator is a type of RC oscillator, that produces the sinusoidal output.  It is commonly used in audio and Sub-audio frequency ranges, that is 20- 20KHz. The maximum frequency of the output of a wien bridge oscillator is only about 1MHz. Circuit Diagram explanation of WIEN BRIDGE OSCILLATOR It has two stage RC …

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RC PHASE SHIFT OSCILLATOR

RC phase shift oscillator are commonly used for generating audio frequencies, that is 1Hz to 10MHz. RC phase shift oscillator consist of an inverting amplifier followed by a feed back network with phase shift of 180 degree. The 180 degree phase shift at the feedback can be obtained by the combination of resistors and capacitors. …

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SCHMITT TRIGGER

Picture courtesy : google Schmitt trigger is an electronic circuit with positive feedback which converts a sinusoidal or any analog signal to digital signal. Schmitt trigger is a comparator circuit with hysteresis, that is the output transition from high to low and low to high will occur at different thresholds. Schmitt trigger belongs to the …

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