Radio receiver with amplitude limiter prior to mixer and band li

Details Radio receiver with amplitude limiter prior to mixer and band li Radio receiver with amplitude limiter prior to mixer and band li

1995-12-01

1999-07-27

Vo, Nguyen

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455217, 455314, H04B 110

Patent

active

059306955

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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patent: 5241967 (1993-09-01), Yasushi et al.

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