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:
Nov. 03, 2009
Filed:
Jun. 16, 2008
Shoji Kawahito, Shizuoka, JP;
Kazutaka Honda, Shizuoka, JP;
Yasuhide Shimizu, Nagasaki, JP;
Kuniyuki Tani, Gifu, JP;
Akira Kurauchi, Kanagawa, JP;
Koji Sushihara, Nara, JP;
Shoji Kawahito, Shizuoka, JP;
Kazutaka Honda, Shizuoka, JP;
Yasuhide Shimizu, Nagasaki, JP;
Kuniyuki Tani, Gifu, JP;
Akira Kurauchi, Kanagawa, JP;
Koji Sushihara, Nara, JP;
Semiconductor Technology Academic Research Center, Kanagawa, JP;
Abstract
In a pipeline type A/D converter apparatus including A/D converter circuit parts connected in cascade with each other and A/D converting a sample hold signal in a pipeline form, each A/D converter circuit part includes a pre-A/D converter circuit for A/D converting an input signal into a digital signal, and a multiplying D/A converter circuit for D/A converting the digital signal into an analog control signal, and D/A converting the input signal by sampling, holding and amplifying the input signal using a sampling capacitor based on the analog control signal. A precharge circuit precharges a sampling capacitor before sampling so as to attain a predetermined output value in accordance with a digital input to output characteristic substantially adapted to an input to output characteristic of each A/D converter circuit part that presents an output signal corresponding to the input signal to each A/D converter circuit part.