Zero crossing modulator

Details Zero crossing modulator Zero crossing modulator

1990-10-01

1991-07-09

Grimm, Siegfried H.

Modulators

Frequency shift keying modulator or minimum shift keying...

Including discrete semiconductor device

332136, 375 65, H03C 322, H04L 2712

Patent

active

050309285

ABSTRACT:
A method and apparatus for modulating a radio frequency signal with digital data including: a variable oscillator, a modulator for varying the oscillator's output, a network for detecting when the oscillator's output crosses its zero axis, a storage device for storing an applied data bit, and wherein the storage device applies the data bit to the modulator when the oscillator's output is at its zero crossing point.

REFERENCES:
patent: 4538136 (1985-08-01), Drabing

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