AMPLIFIER CIRCUIT AND PHOTODETECTION DEVICE
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United States of America Patent
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Issued Date -
Jun 6, 2024
app pub date -
Sep 1, 2023
filing date -
Dec 6, 2022
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Abstract
An amplifier circuit includes a plurality of gain stages that change a gain in each stage and include a first gain stage and a final gain stage, an output terminal that outputs a signal amplified by the plurality of gain stages, a negative input terminal connected to an input node of the first gain stage, a feedback circuit connected between an output node of the final gain stage and the negative input terminal, a first resistor connected between the output node of the final gain stage and the output terminal, an active load of the first gain stage including a first transistor, a second resistor connected to a gate or a base of the first transistor, and a capacitor connected between the gate or the base of the first transistor and the output node of the final gain stage.
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