quadrature amplifier

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quadrature amplifier [′kwä·drə·chər ‚am·plə‚fī·ər]

(electronics)

An amplifier that shifts the phase of a signal 90°; used in a color television receiver to amplify the 3.58-megahertz chrominance subcarrier and shift its phase 90° for use in theQdemodulator.

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