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:
Dec. 21, 2004
Filed:
Dec. 17, 2003
Feng-Ming Liu, Taipei, TW;
Cheng-Wei Chen, Taipei, TW;
Richwave Technology Corp., Taipei, TW;
Abstract
A multi-selection prescaler for dividing an input signal according to a ratio to obtain a desired frequency. The circuit has of a plurality of logic gates and D-flip-flops: a first frequency divider for receiving an input signal and generating a divided frequency; a second frequency divider connected to the first frequency divider for performing a further frequency division based on a selection switch having a plurality of selection signals and a plurality of AND gates; a module control for performing a logic operation on the selection signals and an external control signal (MC) by OR gates and being connected to the first frequency divider to control the divided frequency of the first frequency divider; and an output selection circuit connected to the second frequency divider for selecting output signal according to the selection signals.