US Patent 11349444 Transimpedance amplifier circuit

In a transimpedance amplifier circuit, a control current circuit generates a control current based on a voltage signal and a reference voltage signal and includes an integrating circuit that generates a differential integral signal based on the voltage signal and the reference voltage signal, and a transconductance amplifying circuit that includes a first transconductance circuit that generates a first output current in accordance with the differential integral signal, a second transconductance circuit that generates a second output current in accordance with the differential integral signal, and a current source that supplies a third output current, and a control circuit has an input electrically connected to an output of the first transconductance circuit, an output of the second transconductance circuit, and an output of the current source.