Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1979-09-14
1981-10-13
Richardson, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
307225R, 328 39, 328 41, 358150, H04N 944
Patent
active
042951585
ABSTRACT:
A simple and reliable digital frequency divider for non-integer rational divisors using a signal polarity switch commanded by an auxiliary counter which derives its counting pulses from a main N-position counter. For such complex divisors the generation of phase leads by toggling the signal polarity switch can be delayed or some phase leads can be suppressed by using relatively low-frequency delay pulses, to avoid large auxiliary counters. Video timing circuits are described based on digital frequency dividers of such types.
REFERENCES:
patent: 3663743 (1972-05-01), Dann
Nissen Nico
Op Het Veld Sebastianus J.
Schneider Henri W.
Briody Thomas A.
Cannon, Jr. James J.
Mayer Robert T.
Richardson Robert L.
U.S. Philips Corporation
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