Invention Grant
US07652456B2 Current direction detection circuit and switching regulator having the same
有权
电流方向检测电路和开关调节器具有相同的功能
- Patent Title: Current direction detection circuit and switching regulator having the same
- Patent Title (中): 电流方向检测电路和开关调节器具有相同的功能
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Application No.: US12202707Application Date: 2008-09-02
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Publication No.: US07652456B2Publication Date: 2010-01-26
- Inventor: Yoshiyuki Hojo
- Applicant: Yoshiyuki Hojo
- Applicant Address: JP Kyoto
- Assignee: Rohm Co., Ltd.
- Current Assignee: Rohm Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Keating and Bennett, LLP
- Priority: JP2004-042277 20040219
- Main IPC: G05F1/40
- IPC: G05F1/40 ; G05F1/569
Abstract:
A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the other terminal grounded; first and second constant-current sources; a diode-connected reference transistor interposed between the first constant-current source and ground potential; and a sensing transistor interposed between the second constant-current source and the impedance element and having a control terminal connected with the control terminal of the reference transistor. The current direction detection circuit is small yet capable of minimizing power loss of a switching regulator.
Public/Granted literature
- US20090001951A1 CURRENT DIRECTION DETECTION CIRCUIT AND SWITCHING REGULATOR HAVING THE SAME Public/Granted day:2009-01-01
Information query
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