Invention Grant
US08648585B2 Circuit including first and second transistors coupled between an outpout terminal and a power supply
有权
电路包括耦合在输出端子和电源之间的第一和第二晶体管
- Patent Title: Circuit including first and second transistors coupled between an outpout terminal and a power supply
- Patent Title (中): 电路包括耦合在输出端子和电源之间的第一和第二晶体管
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Application No.: US12285089Application Date: 2008-09-29
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Publication No.: US08648585B2Publication Date: 2014-02-11
- Inventor: Akira Ide
- Applicant: Akira Ide
- Applicant Address: JP Tokyo
- Assignee: Elpida Memory, Inc.
- Current Assignee: Elpida Memory, Inc.
- Current Assignee Address: JP Tokyo
- Agency: McGinn IP Law Group, PLLC
- Priority: JPP2007-258529 20071002
- Main IPC: G05F3/16
- IPC: G05F3/16 ; G05F3/20 ; G05F1/00

Abstract:
A constant current source circuit is constituted of a control voltage generation section which detects the output voltage at the output terminal so as to generate a control voltage, a reference current adjustment section which adjust a reference current based on the control voltage, and a current mirror section which outputs the output current responsive to the adjusted reference current at the output terminal. This reduces variations of the output current due to variations of the output voltage; hence, the constant current source circuit can precisely operate in a low-voltage region.
Public/Granted literature
- US20090085550A1 Constant current source circuit Public/Granted day:2009-04-02
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