Photo detector and associated integrated circuit

Abstract

A photo detector can include: a light emitting device configured to emit light; a driving circuit configured to drive the light emitting device; a photo-electric conversion circuit configured to generate an optical current signal according to an optical signal; an isolation circuit configured to transmit the optical current signal in an isolated manner; an ambient light filter configured to filter a current component of the optical current signal corresponding to an ambient light, and to generate a clean optical current signal; a current amplification circuit configured to amplify the clean optical current signal, and to generate an amplified optical current signal; (vii) an analog-to-digital converter configured to convert the amplified optical current signal to a digital signal; and a control circuit configured to output an optical detection signal according to the digital signal.

Dependencies are inferred from the claim text.