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Patent Searching and Data


Title:
SAMPLING CIRCUIT AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/193789
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve signal quality in a circuit that amplifies an analogue signal and performs sampling. An input signal is inputted to one end of an input-side resistor. An operational amplifier amplifies the input signal and outputs the signal from an output terminal as an amplified signal. A filter capacitor for allowing the passage of a prescribed frequency component from amongst the input signal has one end that is connected to an input terminal of the operational amplifier. A sampling capacitor acquires the amplified signal during a prescribed sampling period, and holds the amplified signal during a prescribed 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 the one end of the sampling capacitor during the hold period. An interruption circuit disconnects the input-side resistor from the 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.

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Inventors:
NAKAMOTO, Eiichi (4-14-1 Asahi-cho Atsugi-sh, Kanagawa 14, 〒2430014, JP)
Application Number:
JP2018/046722
Publication Date:
October 10, 2019
Filing Date:
December 19, 2018
Export Citation:
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Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORPORATION (4-14-1 Asahi-cho, Atsugi-shi Kanagawa, 14, 〒2430014, JP)
International Classes:
H03F3/343; H03F3/70; H03M1/12
Foreign References:
JPH10313221A1998-11-24
JP2006109059A2006-04-20
JP2015154093A2015-08-24
JP2016213641A2016-12-15
Attorney, Agent or Firm:
MARUSHIMA, Toshikazu (Craft Intellectual Property, Keio Shinjuku 3-chome 2nd Bldg.5F, 3-3-2 Shinjuku, Shinjuku-k, Tokyo 22, 〒1600022, JP)
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