TRANSIMPEDANCE AMPLIFIERS
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United States of America Patent
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Issued Date -
Oct 24, 2024
app pub date -
Apr 19, 2023
filing date -
Apr 19, 2023
priority date (Note) -
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status (Latency Note)
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Abstract
This application relates to transimpedance amplifiers (TIAs), in particular to TIAs with wideband feedback. The TIA has an input stage, for receiving an input current and outputting a corresponding output voltage, with a first transistor configured as an input transistor in a first circuit branch. A reference controller is configured to provide a reference voltage with a value equal to a DC value of the output voltage and a voltage regulator is configured to receive a supply voltage and generate a regulated voltage with a voltage offset to the reference voltage, such that the voltage offset does not substantially vary with variation in at least one of the supply voltage, temperature and process variations. The regulated voltage is supplied as a supply voltage to the input stage. The TIA also includes control circuitry for controlling an effective transconductance of the first transistor to a defined value.
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