Arrangement for carrying out current-to-voltage conversion
An arrangement is provided for carrying out current-to-voltage conversion, preferably for an infrared receiver, in which the static offset, which has an interfering effect with regard to sensitivity or malfunctions, is reduced during the carrying out of current-to-voltage conversion of received input pulses. In this arrangement, outputs of a second stage are fed back to inputs of a first stage of the multistage transimpedance stage.
1. Configuration for carrying out a current-to-voltage conversion, preferably for an infrared receiver, comprising a multistage transimpedance stage, which has two inputs with preceding first coupling capacitances and two outputs; the outputs of the transimpedance stage being connected to inputs of a configuration for gain control; and an output of the configuration for gain control being connected to a gain control input of the transimpedance stage; the outputs of the transimpedance stage being connected to an associated input of a downstream comparator, and outputs of a second stage are fed back to inputs of a first stage of the multistage transimpedance stage.
2. Configuration, as claimed in claim 1 , wherein the outputs of the multistage transimpedance stage are connected directly to the inputs of the downstream comparator.
3. Configuration, as claimed in claim 1 , wherein a stage, which limits an output signal to a threshold value, is arranged between the outputs of the transimpedance stage.