Demodulation circuit and demodulation method

Details Demodulation circuit and demodulation method Demodulation circuit and demodulation method

2005-05-24

2005-05-24

Kinkead, Arnold (Department: 2817)

Demodulators

Amplitude modulation demodulator

C329S349000, C329S350000, C329S363000, C329S366000

Reexamination Certificate

active

06897719

ABSTRACT:
Two capacitors are provided for demodulating an amplitude-modulated signal and can be supplied with a signal that is rectified by a diode and that is at a voltage. The half-cycles of this signal are used for alternately charging the first or second capacitor using a switch. The capacitors are discharged using switches. Comparing the amplitude values, which are stored in the capacitors, of successive half-cycles in an evaluation unit allows simple and precise demodulation, which can be achieved with few components and can be carried out at very high frequencies.

REFERENCES:
patent: 3895298 (1975-07-01), Schollmeier
patent: 4706262 (1987-11-01), Ohta
patent: 4737730 (1988-04-01), Ishiwata et al.
patent: 4853643 (1989-08-01), Herleikson
patent: 2 003 093 (1970-08-01), None
patent: 0 524 008 (1993-01-01), None
patent: 11 148 950 (1999-06-01), None

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