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:
Oct. 23, 1990
Filed:
Aug. 22, 1988
Masami Tsuchida, Saitama, JP;
Ichiro Miyake, Saitama, JP;
Tokihiro Takahashi, Saitama, JP;
Shinichi Wakumura, Saitama, JP;
Yoshimi Iso, Kanagawa, JP;
Takao Arai, Kanagawa, JP;
Hiroo Okamoto, Kanagawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An offset compensation circuit for compensating a DC offset which occurs in a circuit line including an A/D converter or an A/D and D/A converter in which not only the polarity bit of digital data but also information concerning the amplitude of an analog input signal are applied to an integrator to precisely compensate an offset voltage in a circuit line. The level of a proper offset compensation voltage is provided even when an input analog signal such as a music signal is absent, and when an A/D and D/A converter is provided which can perform both A/D conversion and D/A conversion the DC offset can be precisely compensated shortly after the change of the mode from D/A conversion to A/D conversion.