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:
Mar. 28, 2006
Filed:
Apr. 15, 2004
Masayuki Katakura, Kanagawa, JP;
Masayuki Katakura, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A sine wave generation circuit for generating a high precision pseudo sine wave without increasing the circuit size including a pulse generation circuit for generating a plurality of pulse signals using an input clock signal as reference and a voltage output circuit for stepwisely changing the voltage level of the output on the basis of a plurality of pulse signals. The voltage output circuit generates a plurality of different coefficients in response to a combination of bit information in a plurality of pulse signals and changes the output of the voltage output circuit in response to a coefficient series obtained when further combining the plurality of generated coefficients, and odd number generation circuits each generating odd number values of ternary-values or more having positive side coefficients and negative side coefficients symmetric about a center coefficient are provided in a plurality of coefficient generation circuits provided in the voltage output circuit.