CURRENT-MODE ANALOG-TO-DIGITAL CONVERTER SYSTEMS, DEVICES AND METHODS FOR MULTI-SENSING
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United States of America Patent
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Issued Date -
Nov 10, 2022
app pub date -
May 7, 2021
filing date -
May 7, 2021
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Abstract
A device can include analog circuits formed with a substrate, including a comparator, analog switches, and a balance current circuit. A sensor current and balance current can be applied at an input of the comparator. The sensor current, balance current or both can be modulated with a switch control signal. Digital circuits can include switch control logic that generates the switch control signal in response to an output of the comparator and a modulation clock signal. Digital signal processing circuits can generate a multi-bit digital value from a bit stream output by the comparator circuit. The multi-bit digital value can be an analog-to-digital conversion of the sensor current. Corresponding methods and systems are also disclosed.
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