Invention Grant
US07936161B2 Bias circuit having second current path to bandgap reference during power-on
有权
偏置电路具有在上电期间具有带隙基准的第二电流路径
- Patent Title: Bias circuit having second current path to bandgap reference during power-on
- Patent Title (中): 偏置电路具有在上电期间具有带隙基准的第二电流路径
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Application No.: US12155712Application Date: 2008-06-09
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Publication No.: US07936161B2Publication Date: 2011-05-03
- Inventor: Kurao Nakagawa
- Applicant: Kurao Nakagawa
- Applicant Address: JP Kawasaki-shi, Kanagawa
- Assignee: Renesas Electronics Corporation
- Current Assignee: Renesas Electronics Corporation
- Current Assignee Address: JP Kawasaki-shi, Kanagawa
- Agency: McGinn IP Law Group, PLLC
- Priority: JP2007-158479 20070615
- Main IPC: G05F3/16
- IPC: G05F3/16 ; G05F3/20
Abstract:
In a conventional bias circuit, as a power supply voltage increases, a current supplied to a bandgap reference becomes unstable due to a fluctuation of the power supply voltage, which makes it impossible for the bias circuit to perform stable bias operations in some cases. A bias circuit of the present invention has a bandgap reference, and includes a first current path supplying a drive current to the bandgap reference, and a second current path supplying a current to the bandgap reference for a predetermined period of time after power-on.
Public/Granted literature
- US20080309309A1 Bias circuit Public/Granted day:2008-12-18
Information query
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