Invention Grant
US07812668B2 Multi-input operational amplifier and method for reducing input offset thereof
有权
多输入运算放大器和减少其输入偏移的方法
- Patent Title: Multi-input operational amplifier and method for reducing input offset thereof
- Patent Title (中): 多输入运算放大器和减少其输入偏移的方法
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Application No.: US12235925Application Date: 2008-09-23
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Publication No.: US07812668B2Publication Date: 2010-10-12
- Inventor: Yung Ching Chang
- Applicant: Yung Ching Chang
- Applicant Address: TW Hsinchu
- Assignee: Advanced Analog Technology, Inc.
- Current Assignee: Advanced Analog Technology, Inc.
- Current Assignee Address: TW Hsinchu
- Agency: WPAT, P.C.
- Agent Anthony King
- Priority: TW97114446A 20080421
- Main IPC: H03F3/45
- IPC: H03F3/45
Abstract:
A multi-input operational amplifier comprises two transconductors, two current mirrors, and a current source. Each transconductor generates a current according to a corresponding voltage difference. When the voltage difference is less than or equal to zero, the current is a constant. When the voltage difference exceeds zero, the current is proportional to the voltage difference.
Public/Granted literature
- US20090261904A1 MULTI-INPUT OPERATIONAL AMPLIFIER AND METHOD FOR REDUCING INPUT OFFSET THEREOF Public/Granted day:2009-10-22
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