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A Precision High-Voltage Current Sensing Circuit

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2 Author(s)
Dake, T. ; Mixed-Signal Automotive Design Group, Texas Instrum. Inc., Dallas, TX ; Ozalevli, E.

This paper presents a precision current sensor featuring a high voltage, high gain (~ 140 dB), and low input offset ( < 1 mV) current sense amplifier. This amplifier does not require offset trimming even for low offset applications. It is a single stage amplifier that has a common gate pMOS differential input pair, which makes it inherently stable. This amplifier topology allows for a wide input common-mode range, thus increasing the versatility of current sensing circuit.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:55 ,  Issue: 5 )