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. 06, 1994
Filed:
Jul. 10, 1992
John H Guilford, Everett, WA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A direct digital synthesizer of the phase-accumulator type, constructed entirely of binary-radix digital hardware, generates signals with decimally-defined frequency resolution. The synthesizer is supplied with a clock signal which is also decimally-defined. The usual decimal-binary incompatibility problems of such a combination are overcome by the use of a phase accumulator which is partitioned into two segments. The first segment is assigned the most significant portion of the desired frequency, and the other segment is assigned the remaining portion of the desired frequency. The two segments have different arithmetic moduli. Typically, the modulus of the first segment is a power of two, while that of the second segment is an integer other than a power of two. A procedure is given for determining both the point of partition and the second arithmetic modulus.