Universal modulator/demodulator

Details Universal modulator/demodulator Universal modulator/demodulator

2006-06-13

2006-06-13

Chin, Stephen (Department: 2634)

Pulse or digital communications

Systems using alternating or pulsating current

C375S233000, C455S066100, C380S266000

Reexamination Certificate

active

07061985

ABSTRACT:
A modulation/demodulation device capable of operating with several types of modulation using different carrier frequencies may include a modulator which modulates at least one signal by a signal of a predetermined duration and representative of a binary information supplied by a microprocessor. The device may also include a demodulator which demodulates the modulated signals arriving from a remote site. This may be done by determining the type of modulation of the received signals and their carrier frequency (or frequencies), supplying signals from an analysis of the signals received according to the determined type of modulation, and detecting the signals of determined duration representative of binary information to make them accessible to the microprocessor.

REFERENCES:
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patent: 4813058 (1989-03-01), Takase
patent: 5642380 (1997-06-01), Lambert
patent: 5940438 (1999-08-01), Poon et al.
patent: 6535739 (2003-03-01), Chen et al.
patent: 2005/0035850 (2005-02-01), Schwager et al.
patent: 0940956 (1999-09-01), None

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