Invention Grant
US07808307B2 Reference current circuit, reference voltage circuit, and startup circuit
有权
参考电流电路，参考电压电路和启动电路
- Patent Title: Reference current circuit, reference voltage circuit, and startup circuit
- Patent Title (中): 参考电流电路，参考电压电路和启动电路
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Application No.: US12093393Application Date: 2007-09-04
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Publication No.: US07808307B2Publication Date: 2010-10-05
- Inventor: Shiro Sakiyama , Akinori Matsumoto , Takashi Morie , Masayoshi Kinoshita
- Applicant: Shiro Sakiyama , Akinori Matsumoto , Takashi Morie , Masayoshi Kinoshita
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2006-247818 20060913
- International Application: PCT/JP2007/067212 WO 20070904
- International Announcement: WO2008/032606 WO 20080320
- Main IPC: G05F1/10
- IPC: G05F1/10
Abstract:
A current mirror circuit 10 is formed to have a current ratio (a transistor size ratio) of 1:m. As well, respective pairs of nMOS transistors MN1, MN3 and nMOS transistors MN2, MN4 are formed to have a current ratio of 1:m. Two currents output from the current mirror circuit 10 are each distributed to two. The distributed currents flowing in the nMOS transistors MN2, MN4 are added and are then allowed to flow into one resistor R2. Hence, for the resistor R2, only one resistor in which current of double flows suffices when m=1, for example. This effortlessly reduces the necessary resistance to one fourth.
Public/Granted literature
- US20090115502A1 REFERENCE CURRENT CIRCUIT, REFERENCE VOLTAGE CIRCUIT, AND STARTUP CIRCUIT Public/Granted day:2009-05-07
Information query
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