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:
Apr. 12, 2011
Filed:
Oct. 26, 2009
Mitsuhiro Sano, Tokyo, JP;
Mitsuhiro Sano, Tokyo, JP;
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Abstract
There is provided a switched capacitor circuit and a pipeline A/D converter which are capable of suppressing electric power from being increased by utilizing a level-shift capacitor, even in a case where the switched capacitor circuit and the pipeline A/D converter are configured by utilizing a CLS technique. In the estimate phase, the capacitor Cc(level shift capacitor) is connected between the output terminal of the operational amplifier AMPand the inverting input terminal of the operational amplifier AMP, so as to sample the output from the operational amplifier AMP, and also to compensate the phase of the operational amplifier AMP. Additionally, in the level shift phase, the capacitor Ccis connected between the output terminal of the operational amplifierand the output terminal Vb, so as to be used to level-shift the output of the operational amplifier AMP. Thereby, the load (the capacitance of the capacitors Ccand Cc) on the operational amplifier AMPis reduced, thereby reducing the electric power of the switched capacitor circuit