Pulse or digital communications – Transceivers
Patent
1992-07-21
1995-08-22
Chin, Stephen
Pulse or digital communications
Transceivers
4551922, 375343, 375344, 375238, H04B 138, H04L 516
Patent
active
054447364
ABSTRACT:
A radio communication apparatus comprises a detecting circuit for detecting a change of a received frequency of a radio communication channel during a communication and outputting a digital detection signal, a pulse width modulating circuit, and a smoothing circuit. The pulse width modulating circuit pulse-width modulates a pulse signal having a predetermined frequency in accordance with the digital detection signal output from the detecting circuit. The smoothing circuit smoothes the pulse-width modulated circuit output from the pulse width modulating circuit and generates an analog control signal. A transmission local oscillating frequency is controlled in accordance with the analog control signal.
REFERENCES:
patent: 3080524 (1963-03-01), Davey et al.
patent: 4607215 (1986-08-01), Takano et al.
patent: 4817192 (1989-03-01), Phillips et al.
patent: 4829543 (1989-05-01), Borth et al.
patent: 4931751 (1990-06-01), Keller et al.
patent: 4958360 (1990-09-01), Sari
patent: 4989074 (1991-01-01), Matsumoto
patent: 5012491 (1991-04-01), Iwasaki
patent: 5142695 (1992-08-01), Roberts et al.
patent: 5200977 (1993-04-01), Ohnishi et al.
Kawashima Kazuhiro
Serizawa Mutsumu
Chin Stephen
Kabushiki Kaisha Toshiba
Vo Don
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