Patent ID: 6847263

Claim:
An optoelectronic component, comprising: a detector configured to receive an optical signal and generate a corresponding input current; and a transimpedance amplifier having a controlled low cutoff frequency as an average input current received from the detector at an amplifier input of the transimpedance amplifier increases, the transimpedance amplifier comprising: a forward transimpedance circuit configured to receive the input current from the detector and to generate an output signal based on the received input current; and a feedback circuit that includes: a first circuit configured to detect a low frequency component of the output signal; and a second circuit that is driven by the low frequency component of the output signal and is connected to the forward transimpedance circuit such that the impedance of the second circuit presented at the amplifier input decreases as the output signal increases, the second circuit including: a first pnp transistor having a first base terminal and a first emitter terminal, wherein the first emitter terminal is connected to the amplifier input; and a second pnp transistor having a second base terminal, the second base terminal being connected to the first base terminal, the second pnp transistor having an emitter size that is some factor smaller than an emitter size of the first pnp transistor.