Bi-phase modulator/demodulator

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

H - Electricity

04

L

354/106, 328/178

H04L 25/49 (2006.01)

Patent

CA 1174297

- 9 - ABSTRACT OF THE DISCLOSURE 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.

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