FSK signal modulator for producing a binary FSK signal

Details FSK signal modulator for producing a binary FSK signal FSK signal modulator for producing a binary FSK signal

2006-12-01

2010-12-28

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Transmitters

Angle modulation

C375S334000, C375S302000, C375S295000

Reexamination Certificate

active

07860187

ABSTRACT:
An FSK signal modulator is provided in a transmitter which receives desired information to be transmitted on its input and which modulates the information to be transmitted to transmit a binary FSK signal. A counter counts a value of addition with the value of addition modified in accordance with a predetermined rule, depending on the value specified by the information to be transmitted, and for holding the counted value. The count value is determined by a threshold value decision circuit with respect to a threshold value. The result from the decision is output in the form of binary FSK signal. An FSK signal modulator will be provided which is simplified in circuit constitution.

REFERENCES:
patent: 6915084 (2005-07-01), Ho et al.
patent: 2003/0030565 (2003-02-01), Sakatani et al.
patent: 07-231337 (1995-08-01), None

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