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:
Jun. 22, 2021
Filed:
Dec. 19, 2018
Sony Semiconductor Solutions Corporation, Kanagawa, JP;
Eiichi Nakamoto, Kanagawa, JP;
SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa, JP;
Abstract
Signal quality is improved in a circuit for amplifying and sampling an analog signal. An input signal is input to one end of an input-side resistor. An operational amplifier amplifies the input signal, and outputs the input signal from an output terminal as an amplified signal. One end of a filter capacitor is connected to an input terminal of the operational amplifier. A predetermined frequency component of the input signal passes through the filter capacitor. A sampling capacitor imports the amplified signal during a predetermined sampling period, and holds the amplified signal during a predetermined hold period. A sampling switch connects the output terminal of the operational amplifier to one end of the sampling capacitor during the sampling period, and disconnects the output terminal of the operational amplifier from one end of the sampling capacitor during the hold period. A cutoff circuit disconnects the input-side resistor from one end of the filter capacitor during the sampling period, and connects the input-side resistor to one end of the filter capacitor during the hold period.