Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1988-04-01
1991-05-07
Safourek, Benedict V.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455166, 455161, 455183, 455212, H04B 116
Patent
active
050143484
ABSTRACT:
Self-programming scanning receiver having superheterodyne circuitry, microprocessor controlled synthesized frequency tuning circuitry, frequency validation means, a learn mode to invoke the frequency validation means for all frequencies tunable by the tuning circuitry, listen mode for scanning of frequencies learned in the learn mode, and an ignore mode for erasing frequencies from permanent memory. The frequency validation means comprises a detector output connected to a high pass filter input, high pass filter output connected to a noise detector, noise detector output connected to a first A/D converter input, algorithms stored in microprocessor program memory for analyzing A/D samples obtained via first A/D for squelch condition, detector output also supplying the input of a low pass filter, output of low pass filter connected to a second A/D converter input, algorithms for analysis of A/D samples obtained from second A/D to determine sufficiency of modulation level and lack of digital waveforms, electrically alterable permanent memory for storing information identifying voice channels.
REFERENCES:
patent: 3916319 (1975-10-01), Hawley et al.
patent: 4092594 (1978-05-01), Baker
patent: 4123715 (1978-10-01), Fathaver
patent: 4198605 (1980-04-01), Yamashita et al.
patent: 4236251 (1980-11-01), Ohgishi et al.
patent: 4264977 (1981-04-01), Deiss
patent: 4367558 (1983-01-01), Gercekci et al.
patent: 4368539 (1983-01-01), Whidden
patent: 4461036 (1984-07-01), Williamson et al.
patent: 4476580 (1984-10-01), Tanaka et al.
patent: 4491975 (1985-01-01), Ito
patent: 4498191 (1985-02-01), Rogers
patent: 4499601 (1985-02-01), Matthews
patent: 4501020 (1985-02-01), Wakeman
patent: 4509203 (1985-04-01), Yamada
patent: 4512035 (1985-04-01), Victor et al.
patent: 4513443 (1985-04-01), Louttit
patent: 4521915 (1985-06-01), Baker et al.
patent: 4525866 (1985-06-01), Templin
patent: 4525867 (1985-06-01), Shiratani
patent: 4549311 (1985-10-01), McLaughlin
patent: 4561112 (1985-12-01), Ridder
patent: 4627091 (1986-12-01), Fedele
patent: 4641367 (1987-02-01), Van Deursen et al.
patent: 4712241 (1987-12-01), Ecklund
Patent Abstracts of Japan, vol. 009197, Aug. 14, 1985, and JP-A-60062221 (Hitachi Maikuro Computer Engineer.), Apr. 10, 1985.
Boone Joseph E.
McCormick, II Ben F.
Safourek Benedict V.
Smith Ralph
Uniden America Corporation
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