FSK modulator

Details FSK modulator FSK modulator

1997-02-11

1998-11-10

Chin, Stephen

Pulse or digital communications

Transmitters

Angle modulation

332101, H03C 300

Patent

active

058355391

ABSTRACT:
The FSK modulator for modulating binary data of the present invention has an object to provide an FSK modulator which can operate at a stable frequency also when a discontinuous data row is entered. The FSK modulator comprises a PLL (phase locked loop) in which binary data is entered at two types of voltage levels different each other, an oscillation output of the PLL treated as output data of the modulator, allows a voltage at an almost-intermediate level to the PLL instead of binary data when the binary data has not been entered.

REFERENCES:
patent: 4567603 (1986-01-01), Howell et al.
patent: 4670888 (1987-06-01), Smith, III
patent: 5706310 (1998-01-01), Wang et al.

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