Invention Grant
US07825604B2 Drive circuit supplying current to load based on control signal, and portable information terminal including the same
有权
驱动电路基于控制信号向负载提供电流，以及包括其的便携式信息终端
- Patent Title: Drive circuit supplying current to load based on control signal, and portable information terminal including the same
- Patent Title (中): 驱动电路基于控制信号向负载提供电流，以及包括其的便携式信息终端
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Application No.: US11913730Application Date: 2006-05-29
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Publication No.: US07825604B2Publication Date: 2010-11-02
- Inventor: Taisuke Chida
- Applicant: Taisuke Chida
- Applicant Address: JP Kyoto
- Assignee: Rohm Co., Ltd.
- Current Assignee: Rohm Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Fish & Richardson P.C.
- Priority: JP2005-164146 20050603
- International Application: PCT/JP2006/310653 WO 20060529
- International Announcement: WO2006/129597 WO 20061207
- Main IPC: H05B39/00
- IPC: H05B39/00
Abstract:
A drive circuit (100) includes an operational amplifier (OP1) that compares a voltage applied to an inverting input terminal with a reference voltage applied to a non-inverting input terminal, a MOS transistor (M1) that has an output connected to the inverting input terminal of the operational amplifier (OP1) and supplies a current to a load (3) depending on a comparison result of the operational amplifier (OP1), and a switch (SW1) that switches, based on a control signal, between outputting the comparison result of the operational amplifier (OP1) to the MOS transistor (M1) and outputting a predetermined voltage to the MOS transistor (M1) to turn off the MOS transistor (M1).
Public/Granted literature
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