Electronics (Mike Jaroch)


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P

PEAK VALUE

The maximum instantaneous value of a varying current, voltage, or power. It is equal to 1.414 times the effective value of a sine wave [2].


PEAK VOLTAGE

The maximum value present in a varying or alternating voltage. This value may be positive or negative [6].


PEAK-REVERSE VOLTAGE

The peak ac voltage that a rectifier tube will withstand in the reverse
direction [6].


PEAK-TO-PEAK

The measure of absolute magnitude of an ac waveform, measured from the greatest positive alternation to the greatest negative alternation [2].


PEAKING COIL

An inductor used in an amplifier to provide high-frequency compensation, which extends the high-frequency response of the amplifier [8].


PENTAVALENT IMPURITY

A type of impurity that contains five valence electrons and donates one
electron to the doped material. Also called DONOR IMPURITY [7].


PENTODE TUBE

A five-electrode electron tube containing a plate, a cathode, a control grid, and two grids [6].


PERCENT OF MODULATION

The degree of modulation defined in terms of the maximum permissible
amount of modulation [12].


PERFORATOR

A device that stores a teletypewriter message on a paper tape [17].

PERIGEE

The point in the orbit of a satellite closest to the earth [17].


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