Current sense circuit with adaptive common mode voltage adjust and associated method thereof
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United States of America Patent
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Jan 30, 2018
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N/A
app pub date -
Sep 15, 2016
filing date -
Sep 15, 2016
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Abstract
A current sense circuit for sensing a target current flowing through a sensing resistor, has a first operational amplifier, a first transistor and a common mode adjust circuit. The first operational amplifier has a first input terminal coupled to a positive terminal of the sensing resistor, a second input terminal coupled to a negative terminal of the sensing resistor, and an output terminal. The first transistor has a first terminal coupled to the first input terminal of the first operational amplifier, a second terminal configured to provide a first output voltage in responsive to the target current, and a control terminal coupled to the output terminal of the first operational amplifier. The common mode adjust circuit adaptively adjusts a common mode voltage of the first operational amplifier.
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