PSK Modem having dual-integrator voltage controlled oscillator

Details PSK Modem having dual-integrator voltage controlled oscillator PSK Modem having dual-integrator voltage controlled oscillator

1982-08-16

1985-12-17

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

331113R, 307291, H04L 2718

Patent

active

045596344

ABSTRACT:
A PSK modem has a transmitter for converting received digital signals into corresponding PSK output signals and a receiver for receiving PSK signals and converting into corresponding digital signals. The receiver has a dual-integrator voltage controlled oscillator in which, during any given cycle of oscillations, one-half of the circuit is integrating toward the threshold voltage while the other half is idle. When the output of the integrating half reaches the threshold voltage, a control flip-flop toggles and the formerly idle integrator half begins to integrate, allowing the other half to stabilize before the next cycle of oscillation.

REFERENCES:
patent: 3560864 (1971-02-01), Nihof
patent: 3909635 (1975-09-01), Maida
patent: 3914712 (1975-10-01), Currie
patent: 4270206 (1981-05-01), Hughes
patent: 4336613 (1982-06-01), Hewes
patent: 4340871 (1982-07-01), Teza
patent: 4370628 (1983-01-01), Henderson et al.

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