BASELINE WANDER DIFFERENTIAL TIA WITH RESISTIVE FEEDFORWARD AC COUPLING PATH
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United States of America Patent
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Issued Date -
May 2, 2024
app pub date -
Oct 31, 2022
filing date -
Oct 31, 2022
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Abstract
An apparatus comprises: a photodetector having a cathode and an anode to generate an output current; and a differential transimpedance amplifier (TIA) having a first amplifier input coupled to a first one of the cathode and the anode through a first AC coupling capacitor and a first feedforward resistor that is connected in parallel with the first AC coupling capacitor between the first one of the cathode and the anode and the first amplifier input, the differential TIA having a second amplifier input coupled to a second one of the cathode and the anode that is not the first one of the anode and the cathode, the differential TIA configured to convert the output current of the photodetector as presented at the first amplifier input and the second amplifier input to a differential output voltage.
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