Radio apparatus with offset compensating circuit

Details Radio apparatus with offset compensating circuit Radio apparatus with offset compensating circuit

1996-12-17

1999-01-26

Chin, Stephen

Pulse or digital communications

Transmitters

Antinoise or distortion

375308, 375296, 455126, H04L 2718, H04L 2503, H01Q 1112

Patent

active

058645861

ABSTRACT:
A radio apparatus is disclosed which includes a modulator that modulates an input signal having an input offset voltage held by an input sample and hold circuit and outputs an output signal having an output offset voltage. A demodulator of the radio apparatus demodulates the output signal and outputs a demodulated signal. The radio apparatus also has an offset compensating circuit which makes the output offset voltage coincide with a demodulated offset voltage of the demodulated signal by comparing the input offset voltage with the demodulated signal in order to output a feedback signal to the modulator.

REFERENCES:
patent: 4933986 (1990-06-01), Leitch
patent: 5483681 (1996-01-01), Bergsten et al.
patent: 5613226 (1997-03-01), Kanami

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