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 …

Continue reading ‘COLPITTS OSCILLATOR’ »

Question and Answer Discussion

Please check the question and answers for the village assistant exam conducted by kerala public service commission. remember that each questions have a good probability to ask again in the upcoming exams. so download and study these material. Click here to download Question paper  Click here to download Answer key

WIEN BRIDGE OSCILLATOR

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 It has two stage RC amplifier each producing …

Continue reading ‘WIEN BRIDGE OSCILLATOR’ »

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. …

Continue reading ‘RC PHASE SHIFT OSCILLATOR’ »

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 …

Continue reading ‘SCHMITT TRIGGER’ »