Invention Grant
US07948223B2 Constant voltage circuit using plural error amplifiers to improve response speed
有权
使用多个误差放大器的恒压电路来提高响应速度
- Patent Title: Constant voltage circuit using plural error amplifiers to improve response speed
- Patent Title (中): 使用多个误差放大器的恒压电路来提高响应速度
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Application No.: US12057294Application Date: 2008-03-27
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Publication No.: US07948223B2Publication Date: 2011-05-24
- Inventor: Toshihisa Nagata , Kohji Yoshii , Yusuke Minakuchi
- Applicant: Toshihisa Nagata , Kohji Yoshii , Yusuke Minakuchi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2004-095544 20040329; JP2004-139948 20040510; JP2005-069480 20050311; JP2005-069491 20050311
- Main IPC: G05F1/56
- IPC: G05F1/56
Abstract:
A constant voltage circuit that is capable of realizing high speed response with respect to an abrupt change in an input voltage or a load current is disclosed. The constant voltage circuit includes a first error amplifier with a high direct current gain and a second error amplifier with high speed responsiveness with respect to a change in an output voltage. The constant voltage circuit uses the first and second error amplifiers to conduct operation control of an output voltage control transistor in response to a change in the output voltage.
Public/Granted literature
- US20080238385A1 CONSTANT VOLTAGE CIRCUIT Public/Granted day:2008-10-02
Information query
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