Horizontal AFC (automatic frequency control) circuit

Details Horizontal AFC (automatic frequency control) circuit Horizontal AFC (automatic frequency control) circuit

1992-10-27

1993-12-21

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358149, 358155, H04N 505

Patent

active

052725324

ABSTRACT:
In a horizontal AFC circuit, a window output is produced from a window generating circuit 4 in response to an AFC output having a relatively long time constant, derived from a first AFC circuit 2. The window output is synchronously differentiated by an edge detecting circuit 5. Another AFC output having a relatively short time constant, derived from a second AFC circuit 3, is present within a window range under the normal condition. A horizontal oscillation output derived from an OR circuit 10 into which outputs from a DFF 8 and an AND circuit 7 are inputted, corresponds to the AFC output from the second AFC circuit 3. Also, when the AFC output of the second AFC circuit 3 is not present within the window range, the output from the OR circuit 10 corresponds to the edge outputs from the edge detecting circuit 5.

REFERENCES:
patent: 3334182 (1967-08-01), Legler

Affiliated with

Also associated with

Rating

Horizontal AFC (automatic frequency control) circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Horizontal AFC (automatic frequency control) circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Horizontal AFC (automatic frequency control) circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-312324