Bi-phase modulator/demodulator

Details Bi-phase modulator/demodulator Bi-phase modulator/demodulator

1980-10-27

1982-11-30

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

329102, 329103, 329105, 332 16T, 375 55, 375 87, H04L 2720, H04L 2722

Patent

active

043618170

ABSTRACT:
A bi-phase modulator/demodulator circuit for converting uni-polar to bi-polar signals. The circuit can be used to bi-phase modulate a continuous wave (CW) input signal or to demodulate a bi-phase coded input signal by use of transistor-transistor logic (TTL) control signals. A tri-state logic gate is used to convert two digital signals to an unbiased AC signal which is applied to one of two inputs of a double balanced mixer. The other input of the mixer is adapted to receive a continuous wave signal for bi-phase modulation, or a bi-phase coded signal for demodulation.

REFERENCES:
patent: 3483488 (1969-12-01), Crosby
patent: 4122300 (1978-10-01), Busigny et al.
patent: 4176328 (1979-11-01), Brown et al.

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