Patent ID: 8604839

Claim:
A current-to-voltage converter configured to provide a voltage signal based on a current signal, comprising: a first active stage having an input and an output, wherein the first active stage is configured to receive the current signal at its input and provide the voltage signal at its output; and a second active stage coupled between the output of the first active stage and the input of the first active stage, wherein the second active stage is configured to provide the input of the first active stage with a feedback signal that frequency-selectively counteracts an amplification, by the first active stage, of signal components of the current signal applied to the input of the first active stage that have a frequency outside of a prescribed useful frequency band, wherein the first active stage is configured to act as a low-pass filter, and wherein a first transfer path from the output of the first active stage to an input of an active portion of the second active stage has a first high-pass filter characteristic, and a second transfer path from an output of the active portion of the second active stage to the input of the first active stage has a second high-pass filter characteristic.