Scanning radio receiver

Details Scanning radio receiver Scanning radio receiver

1987-09-18

1989-12-19

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455186, 455194, 455212, H03J 718

Patent

active

048888150

ABSTRACT:
A multi-band scanning radio receiver operable without reprogramming in a plurality of geographical regions. Digital codes for public-service-band frequency allocations for each of a plurality of geographical regions are stored in a memory which is sequentially accessed to read the digital codes for the frequency allocations for a selected geographical region. A frequency synthesizer loaded with a digital code read from memory performs band switching and supplies tracking signals and a local oscillator signal to multi-band RF amplifier and mixer circuitry.

REFERENCES:
patent: 4253194 (1981-02-01), van Deursen
patent: 4385399 (1983-05-01), Ogita
patent: 4392246 (1983-07-01), Niioka et al.
patent: 4392247 (1983-07-01), van Deursen
patent: 4398304 (1983-08-01), Fathauer et al.
patent: 4476582 (1984-10-01), Strauss et al.
patent: 4521914 (1985-06-01), Petrovic

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