Invention Grant
- Patent Title: Current measurement circuit, current detection circuit and saturation prevention and recovery circuit for operational amplifier
- Patent Title (中): 电流测量电路,电流检测电路和运算放大器的饱和预防和恢复电路
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Application No.: US12423219Application Date: 2009-04-14
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Publication No.: US07994771B2Publication Date: 2011-08-09
- Inventor: Hiroshi Sakayori
- Applicant: Hiroshi Sakayori
- Applicant Address: US CA Santa Clara
- Assignee: Agilent Technologies, Inc.
- Current Assignee: Agilent Technologies, Inc.
- Current Assignee Address: US CA Santa Clara
- Main IPC: G01R19/00
- IPC: G01R19/00

Abstract:
A current measurement circuit includes: a constant-voltage loop circuit including an operational amplifier, and a first resistor for current detection connected to an output of the operational amplifier, the output of the operational amplifier being fed back to an inverting input terminal of the operational amplifier via the first resistor; a differential amplifier for current detection with an input of a voltage between both ends of the first resistor; and a saturation prevention and recovery circuit connected to the both ends of the first resistor for preventing saturation of the operational amplifier and/or accelerating recovery from the saturation thereof.
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