Frequency modifier for a transmitter

Details Frequency modifier for a transmitter Frequency modifier for a transmitter

1993-09-24

1996-07-09

Chin, Stephen

Pulse or digital communications

Transmitters

Antinoise or distortion

375298, 375302, 455112, 455118, 455119, 455126, 332103, 332124, 330107, 330149, 330207R, 331 23, H04K 102

Patent

active

055352472

ABSTRACT:
A transmitter has an oscillator (101, 201, 303, 401, 501) that operates at frequency k multiplied by f.sub.c, thus the oscillator (101, 201, 303, 401, 501) outputs a signal at an output frequency, kf.sub.c. Coupled to the oscillator (101, 201, 303, 401, 501) is a frequency modifier (103, 205, 307, 405, 505), for modifying the oscillator output frequency by factor 1/k, thereby producing a signal at frequency f.sub.c at the frequency modifier output. Coupled to the frequency modifier output is a modulator (105, 215, 301, 407-417, 507-517) for producing a modulated output signal substantially centered at frequency f.sub.c.

REFERENCES:
patent: 3289082 (1966-11-01), Shumate
patent: 3854094 (1974-12-01), Towler
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patent: 4068198 (1978-01-01), Otto
patent: 4291277 (1981-09-01), Davis et al.
patent: 4373115 (1983-02-01), Kahn
patent: 4929906 (1990-05-01), Voyce et al.
patent: 5021754 (1991-06-01), Shepherd et al.
patent: 5066922 (1991-11-01), Leitch
patent: 5075643 (1991-12-01), Einbinder
patent: 5216425 (1993-06-01), Erhage
patent: 5319675 (1994-06-01), Osaka
patent: 5381108 (1995-01-01), Whitmarsh et al.
patent: 5434887 (1995-07-01), Osaka

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