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;Varicap (acronym from English vari (able) - "variable", and cap (acitance) - "[electrical] capacity") is an electronic device, a semiconductor diode, the operation of which is based on the dependence of the barrier capacity of the p-n-junction on the reverse voltage.
Varicaps with high power dissipation, designed for frequency multiplication in radio transmitters, are commonly called varactors. Varicaps are used as elements with electrically controlled capacitance in frequency tuning circuits of an oscillatory circuit in frequency selective circuits, frequency division and multiplication, frequency modulation, controlled phase shifters, etc.
Varicaps with high power dissipation, designed for frequency multiplication in radio transmitters, are commonly called varactors. Varicaps are used as elements with electrically controlled capacitance in frequency tuning circuits of an oscillatory circuit in frequency selective circuits, frequency division and multiplication, frequency modulation, controlled phase shifters, etc.
