Radio receiver with amplitude limiter prior to mixer and band limiting filter
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United States of America Patent
Stats
-
Jul 27, 1999
Grant Date -
N/A
app pub date -
Dec 1, 1995
filing date -
Dec 5, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio receiver is disclosed. An arbitrary receive signal received through an antenna is amplified by an input amplifier. The signal amplified by the input amplifier is converted into a predetermined frequency by a mixer. The signal frequency-converted by the mixer is shaped in waveform by a band-limiting filter. The signal thus shaped in waveform is amplified and amplitude-limited by a limiting amplifier. The signal limited in amplitude is demodulated by a demodulator. In order to prevent the mixer circuit from generating a distortion due to an excessive input, another amplitude-limiting circuit operated at a level not saturating the mixer circuit is arranged in a stage before the mixer circuit.
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