Differential signal conditioner with common mode voltage error compensation
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United States of America Patent
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Mar 6, 2018
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app pub date -
Jul 18, 2016
filing date -
Jul 18, 2016
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Abstract
A differential signal conditioner circuit with common mode voltage (CMV) compensation is provided. The circuit includes a signal multiplexer that receives a input signal that includes a high and low signal and a reference CMV signal, a differential amplifier coupled to the signal multiplexer that receives the reference CMV signal and outputs a CMV error value during a first cycle, and receives the input signal and outputs an amplified difference signal during a second cycle. The circuit also includes a CMV measurement circuit that receives the reference CMV signal and outputs a confirmation value during the first cycle, and receives the input signal and outputs a CMV compensation value during the second cycle, and a processing element that receives the CMV error value, the amplified difference signal, the CMV compensation value, and a differential amplifier gain value and generates a CMV compensated output based on the received signals and values.
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