Accession Number : ADD008484

Title :   Signal Generator.

Descriptive Note : Patent,


Personal Author(s) : Junod,Michael T ; Bates,Albert M

Report Date : 31 Mar 1981

Pagination or Media Count : 8

Abstract : A simultaneous multichannel signal generator incorporating phase-locked loop 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. (Author)

Descriptors :   *Patents, *Signal generators, *Radio transmitters, Radio transmission, Multichannel, Adaptive systems, Phase locked communications, Voltage regulators, Voltage controlled oscillators, Frequency division multiplexing

Subject Categories : Electrical and Electronic Equipment
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE