Demodulation apparatus, test apparatus and electronic device

Details Demodulation apparatus, test apparatus and electronic device Demodulation apparatus, test apparatus and electronic device

2011-03-08

2011-03-08

Pascal, Robert (Department: 2817)

Demodulators

Amplitude modulation demodulator

Input signal combined with local oscillator or carrier...

C329S307000, C329S345000, C329S347000, C702S079000

Reexamination Certificate

active

07902918

ABSTRACT:
A demodulation apparatus that demodulates an amplitude-phase-modulated signal having a level and a transition phase selected from among a plurality of levels and a plurality of phases according to transmission data, comprising a clock recovering section that receives the amplitude-phase-modulated signal and recovers a clock signal synchronized with the amplitude-phase-modulated signal; an amplitude and phase detecting section that detects, with the clock signal as a reference, the level and the transition phase of the amplitude-phase-modulated signal; a data output section that outputs data corresponding to the level and the transition phase detected by the amplitude and phase detecting section; and a phase difference correcting section that outputs a correction signal for correcting an oscillation frequency of the clock signal output by the clock recovering section, according to the transition phase detected by the amplitude and phase detecting section.

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