High speed passband phase modulation apparatus and method of...

Modulators – Phase modulator

Reexamination Certificate

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Details

C327S161000, C327S234000, C327S244000

Reexamination Certificate

active

11471512

ABSTRACT:
A high speed passband phase modulation apparatus and method are provided. In the phase modulation apparatus, an RF phase shifter modulates a phase of a local signal that is generated in a VCO according to a digital input. The RF phase shifter is controlled by a phase-controlled loop so that a baseband phase shifter is phased locked to a modulation reference signal from the local signal and a reference clock signal according to the digital input. The phase-controlled loop phase-locks using the modulation reference signal so that the phase-modulated signal generated in the RF phase shifter has a phase value according to the digital input.

REFERENCES:
patent: 7319352 (2008-01-01), Scheytt

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