METHODS AND APPARATUS TO REDUCE OFFSET AND GAIN ERROR IN MULTISTAGE CURRENT SENSE AMPLIFIERS
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United States of America Patent
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Issued Date -
May 30, 2024
app pub date -
Nov 28, 2022
filing date -
Nov 28, 2022
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Abstract
An example apparatus includes: a transconductance stage including: a fully differential amplifier configured to generate a differential current based on a voltage input; and a transistor configured to be controlled by an output of the fully differential amplifier and source current from an input of the fully differential amplifier; and a transimpedance stage coupled to the transconductance stage, the transimpedance stage including: resistor circuitry configured to convert the differential current into a differential voltage using a first resistance, a second resistance, and a third resistance; and a differential amplifier configured to convert the differential voltage to a single-ended voltage, which represents the voltage input.
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