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. 04, 2009
Filed:
Jun. 18, 2007
Benjamin Esposito, Oviedo, FL (US);
Benjamin Esposito, Oviedo, FL (US);
Altera Corporation, San Jose, CA (US);
Abstract
A multichannel numerically controlled oscillator is provided. The multichannel numerically controlled oscillator has a dual port memory. An output function generation lookup table in the dual port memory is used to generate output functions for the numerically controlled oscillator. A first channel of output is generated based on a first address signal that is presented on a first port of the dual port memory. A second channel of output is generated based on a second address signal that is presented on a second port of the dual port memory. First and second phase accumulators may be used to produce the address signals for the first and second ports of the dual port memory, respectively. The phase accumulators may each contain a register, an adder, and a feedback path. The registers in the phase accumulators and the dual port memory may handle signals at the clock rate of the output channels.