Direct modulator for shift keying modulation

Details Direct modulator for shift keying modulation Direct modulator for shift keying modulation

2006-09-19

2006-09-19

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

C332S128000, C341S143000

Reexamination Certificate

active

07109805

ABSTRACT:
A system for direct modulation is disclosed. Embodiments of the direct modulator for shift-keying modulation include impressing baseband data on a radio frequency (RF) signal at an oscillator by controlling a digital divider using a sigma-delta modulator.

REFERENCES:
patent: 5130676 (1992-07-01), Mutz
patent: 6008703 (1999-12-01), Perrott et al.

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