Signal generator

Details Signal generator Signal generator

1979-08-27

1981-03-31

Bookbinder, Marc E.

Telecommunications

Transmitter

Plural separate transmitters or channels

331 2, 331 14, 332 21, 455113, 455119, H04B 104, H03L 708, H03C 302

Patent

active

042597447

ABSTRACT:
A simultaneous multichannel signal generator incorporating phase-locked l frequency correction. For each channel, there is a voltage-controlled oscillator (VCO) set to an appropriate frequency by a tuning signal and modulated by a channel data signal. The output signals from all VCO's are provided to a summer and then are appropriately amplified and filtered for transmission. A single multiplexed frequency correction circuit compares the phase of a reference frequency signal with the phase of a VCO output signal whose frequency has been divided, by a divide-by-N counter, to the reference frequency. If the divided VCO signal is out of phase with the reference frequency signal, an appropriate correction signal is provided to the device providing voltage control for that VCO.

REFERENCES:
patent: 2614246 (1952-10-01), Dome
patent: 3277389 (1966-10-01), Venn
patent: 3370266 (1968-02-01), Taddeo et al.
patent: 3465103 (1969-09-01), Lynch
patent: 3479610 (1969-11-01), Wicker
patent: 3713040 (1973-01-01), Page, Jr.
patent: 3899746 (1975-08-01), Gammel
patent: 3927384 (1975-12-01), Jezo

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