Invention Grant
- Patent Title: Switched-capacitor input circuit and analog-to-digital converter including the same
- Patent Title (中): 开关电容器输入电路和包含其的模数转换器
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Application No.: US12943772Application Date: 2010-11-10
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Publication No.: US08223059B2Publication Date: 2012-07-17
- Inventor: Toshiaki Ono
- Applicant: Toshiaki Ono
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2009-279813 20091209
- Main IPC: H03M1/12
- IPC: H03M1/12
Abstract:
A switched-capacitor input circuit which receives an analog input signal, and samples and holds the analog input signal, comprising a differential amplifier, a first capacitor, one terminal of the first capacitor being connected to a non-inverting input terminal of the differential amplifier, a second capacitor, one terminal of the second capacitor being connected to an inverting input terminal of the differential amplifier, a first switch configured to connect the other terminal of the first capacitor to one of a first reference voltage and a second reference voltage, a second switch configured to connect the other terminal of the second capacitor to one of the first reference voltage and the second reference voltage, and a third switch configured to connect the other terminal of the first capacitor to the other terminal of the second capacitor.
Public/Granted literature
- US20110133974A1 SWITCHED-CAPACITOR INPUT CIRCUIT AND ANALOG-TO-DIGITAL CONVERTER INCLUDING THE SAME Public/Granted day:2011-06-09
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