Front end circuits of FM receivers

Details Front end circuits of FM receivers Front end circuits of FM receivers

1978-02-27

1980-09-30

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455290, H03H 712, H04B 118

Patent

active

042258235

ABSTRACT:
The front end circuit is constituted by first and second signal paths for transmitting a high frequency signal received by an antenna, and a transfer switch for selecting either one of the signal paths depending upon the state of the received signal, and a circuit for converting the frequency of either one of the selected signals to an intermediate frequency signal. Two signal paths have different filtering attenuating and amplifying characteristics, thereby providing an optimum condition for either a local or distant reception of radio wave signals.

REFERENCES:
patent: 2512481 (1950-06-01), Cohen
patent: 2812434 (1957-11-01), van der Sijde et al.
patent: 3243708 (1966-03-01), Manson
patent: 3389338 (1968-06-01), Slavin
patent: 3469194 (1969-09-01), Osborn
patent: 3571723 (1971-03-01), Ogusu
patent: 3730980 (1973-05-01), Kirk, Jr.
patent: 3801922 (1974-04-01), Muszkiewicz
patent: 3882266 (1975-05-01), Walding

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