Digital and analog modulator in a simplified circuit structure

Details Digital and analog modulator in a simplified circuit structure Digital and analog modulator in a simplified circuit structure

1997-01-10

1999-04-13

Mis, David

Modulators

Phase shift keying modulator or quadrature amplitude modulator

332119, 332151, 327254, 455102, 455313, H03C 300

Patent

active

058942491

ABSTRACT:
A digital and analog modulator is configured in a simplified circuit structure. The modulator includes a first frequency mixer circuit for modulating a carrier with an analog signal or a sine wave component of a digital signal, a second frequency mixer circuit for modulating a signal attained by shifting a phase of the carrier with an analog signal or a cosine wave component of the digital signal, and an adder for adding signals from the first and second frequency mixer circuits to each other.

REFERENCES:
patent: 4843351 (1989-06-01), Edwards et al.
patent: 5224119 (1993-06-01), Barabash et al.
patent: 5319675 (1994-06-01), Osaka

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