Apparatus and method for detecting a carrier signal

Details Apparatus and method for detecting a carrier signal Apparatus and method for detecting a carrier signal

1989-09-29

1991-04-30

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

328138, 329303, H03D 304

Patent

active

050124927

ABSTRACT:
A carrier detection circuit is provided for reliably detecting the presence of a carrier signal. The carrier detection circuit operates on a carrier signal which includes a first symbol exhibiting a first frequency representing a logic 1 and a second symbol exhibiting a second frequency representing a logic 0. A first carrier detect pulse exhibiting a first logic state is generated each time the carrier signal exceeds a predetermined threshold voltage. A plurality of consecutive first carrier detect pulses are checked to determine the logic state of each. A second carrier detect pulse is generated if it is determined that each of the plurality of consecutive first carrier detect pulses exhibit the first logic state.

REFERENCES:
patent: 3958183 (1976-05-01), Schaefer
patent: 4047114 (1977-09-01), Lane et al.
patent: 4232267 (1980-11-01), Hanajima et al.
patent: 4485448 (1984-11-01), Kurth
patent: 4554508 (1985-11-01), Haque
patent: 4737984 (1988-04-01), Brown
"Single-Channel Phase-Coherent-FSK Bus Physical Layer"; May, 1988; Token-Passing Bus-IEEE 802.4 Draft K; pp. 173-186.

Affiliated with

Also associated with

Rating

Apparatus and method for detecting a carrier signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for detecting a carrier signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for detecting a carrier signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-646660