Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Pulse multiplication or division
Patent
1992-01-17
1993-06-29
Sikes, William L.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Pulse multiplication or division
377 47, 377 52, 331 1A, H03K 500
Patent
active
052241327
ABSTRACT:
A fractional divider using a counter means to provide fractionality. A divider is used to divide the VCO output signal by N or N+1 as selected. A divider control circuit controls the divider to divide by the appropriate divisor to obtain the selected output frequency. The fractional divider circuit counts divider control signals which represent a first division period. The fractional divider circuit establishes a second period of multiple first periods and at the terminal count of each second period, provides a selected number of fractional control signals to the divider control to cause division by a different number, such as N+1. The fractional divider comprises a first counter programmed to count first periods and issue its terminal count upon receiving the programmed count of first periods. The fractional divider also comprises a second counter to provide the selected number of fractional control signals upon receipt of the terminal count of the first counter. The first and second counters thus operate as a fraction, e.g. F/K, to result in a fractional reference frequency.
REFERENCES:
patent: 3882403 (1975-05-01), Gerken
patent: 3928813 (1975-12-01), Kingsford-Smith
patent: 3935538 (1976-01-01), Kizler et al.
patent: 3959737 (1976-05-01), Tanis
patent: 3967945 (1976-08-01), Cox
patent: 4179670 (1979-12-01), Kingsbury
patent: 4458329 (1984-07-01), Remy
patent: 4468632 (1984-08-01), Crowley
patent: 4492936 (1985-01-01), Albarello et al.
patent: 4573176 (1986-02-01), Yeager
patent: 4586005 (1986-04-01), Crawford
patent: 4686488 (1987-08-01), Attenborough
patent: 4712224 (1987-12-01), Nelson
patent: 4752902 (1988-06-01), Goldberg
patent: 4763083 (1988-08-01), Edwards
patent: 4815018 (1989-03-01), Reinhardt et al.
patent: 4816774 (1989-03-01), Martin
patent: 4918403 (1990-04-01), Martin
patent: 5021754 (1991-06-01), Shepherd et al.
patent: 5038117 (1991-08-01), Miller
patent: 5038120 (1991-08-01), Wheatley et al.
Ouellette Scott A.
Sciteq Electronics, Inc.
Sikes William L.
LandOfFree
Programmable fractional-N frequency synthesizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Programmable fractional-N frequency synthesizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable fractional-N frequency synthesizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1761785