The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2000
Filed:
Feb. 25, 1999
Paul L Opsahl, Cedar Rapids, IA (US);
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Abstract
A programmable prescaler for scaling an input frequency into a desired output frequency including an input divider having an input connected to the input frequency and a divided output, a first counter, having an input connected to the divided output of the input divider and a terminal count output; and a second counter coupled to the terminal count output of the first counter having a scaled-frequency output. The second counter may be a divide by two counter, and may be coupled to the terminal count output of the first counter via the input divider. The input divider further may further include a plurality of divider stages, the input frequency and the terminal count output being cascaded through the plurality of divider stages, and wherein the second counter is coupled to the terminal count output of the first counter via the plurality of divider stages of the input divider. The terminal count output of the first counter may be coupled to a first divider stage of the plurality of divider stages, and an output of the first divider stage of the plurality of divider stages may be connected to a clock input of the second counter. The first counter may be a programmable binary counter. The scaled frequency output may be a signal having a duty cycle of approximately 50% and a frequency of one-half the desired output frequency. Additionally, the programmable prescaler may further comprise an edge detector coupled to the scaled frequency output of the second counter.