Binary phase shift keying modulation system

Details Binary phase shift keying modulation system Binary phase shift keying modulation system

1990-08-27

1992-06-02

Tarcza, Thomas H.

Pulse or digital communications

Repeaters

Testing

332103, 375 67, 375 56, 375 83, H04K 100

Patent

active

051193965

ABSTRACT:
A low cost spread spectrum modulator for BPSK, or Binary Phase Shift Keying capable of outputting the high modulation rate and suppressed carrier output needed in spread spectrum systems. The present invention provides high quality BPSK modulation without the double balance mixers as required in the prior art, thereby dispensing with the necessity of complex transistor/potonciometer or diode/transformer arrangements. The present invention provides BPSK modulation utilizing only one transformer, which can be adjusted for carrier suppression and two transistors, allowing the present system to be driven from low power CMOS logic levels, yet producing eight db of gain.

REFERENCES:
patent: 4979183 (1990-12-01), Cowart
patent: 5029180 (1991-07-01), Cowart

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