Modulator

Details Modulator Modulator

1990-05-10

1991-02-05

Pascal, Robert J.

Modulators

Frequency shift keying modulator or minimum shift keying...

Including discrete semiconductor device

375 39, H03C 300

Patent

active

049908677

ABSTRACT:
In a modulator for converting two digital signals of I channel and Q channel in base band into analog signals and for converting a component of the signals whose phase is the same as a carrier and another component of the signals whose phase is orthogonal to the carrier so as to produce an orthogonally modulated wave, the two digital signals are connected to one signal train by time-sharing and multiplexing them and the converted analog signals are separated to two analog signals for the I channel and the Q channel and thereby a digital modulator can be structured by using only one digital/analog converter resulting in reducing the adjustment points and the production cost.

REFERENCES:
patent: 4751478 (1988-06-01), Yoshida

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