Phase-shift-keying transmitter

Details Phase-shift-keying transmitter Phase-shift-keying transmitter

1987-11-20

1990-05-15

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 67, 375 68, 455116, H04L 2549

Patent

active

049264419

ABSTRACT:
An improved PSK transmitter such as may be used in a CATV system in the up-link from terminal units to a center having a simple arrangement for switching ON and OFF the PSK carrier signal. An oscillator produces a oscillation output signal at a frequency twice that of the desired carrier frequency. The output of the oscillator is then frequency divided by an element such as a T-type flip-flop, the operation of which is switched ON and OFF by a control signal.

REFERENCES:
patent: 3144608 (1964-08-01), Warring
patent: 4217467 (1980-08-01), Kobayashi et al.
patent: 4485478 (1984-11-01), Takada
patent: 4540957 (1985-09-01), Hanna
patent: 4633510 (1986-12-01), Suzuki et al.
patent: 4706262 (1987-11-01), Ohta
patent: 4739288 (1988-04-01), Ide et al.
"Hotel Two-Way CATV System", National Technical Report, vol. 32, No. 3, Jun., 1986, pp. 52+, by Minagawa et al.

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