FSK Modulator and method for NRZ data transmission utilizing PLL

Details FSK Modulator and method for NRZ data transmission utilizing PLL FSK Modulator and method for NRZ data transmission utilizing PLL

1983-06-09

1986-01-28

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

332 19, H03C 306

Patent

active

045676038

ABSTRACT:
A frequency generator in which the PLL frequency synthesizer and the VCO are directly modulated by an input serial data stream for providing an FSK modulated RF output signal useful in narrowband data communication systems. The serial data stream may alternatively modulate either the PLL frequency synthesizer or the VCO alone.

REFERENCES:
patent: 3938045 (1976-02-01), Mathwich
patent: 4052672 (1977-10-01), Enderby et al.
patent: 4068198 (1978-01-01), Otto
patent: 4068199 (1978-01-01), Madoff
patent: 4286237 (1981-08-01), James
patent: 4447792 (1984-05-01), Wynn
patent: 4481489 (1984-11-01), Kurby

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