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. 04, 2014
Filed:
Mar. 02, 2012
Shiro Dosho, Osaka, JP;
Shiro Dosho, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An oversampling A/D converter with a few operational amplifiers is configured using a complex second-order integrator including first and second second-order integrators and first and second coupling circuits configured to couple these integrators together. Each of the second-order integrators includes an operational amplifier, four resistance elements, and three capacitance elements. The first coupling circuit cross-couples one of two serially-connected capacitance elements inserted between the inverted input terminal and output terminal of the operational amplifier in the first second-order integrator to the counterpart in the second second-order integrator using two resistance elements. The second coupling circuit cross-couples the other capacitance element in the first second-order integrator to the counterpart in the second second-order integrator using two resistance elements.