公开(公告)号：US20040136726A1

公开(公告)日：2004-07-15

申请号：US10743933

申请日：2003-12-23

Applicant: Universal Electronics Inc.

Inventor： Marcus Escobosa ,  Thomas M. Salsman ,  William L. Brown

IPC: H04B010/00

CPC classification number: G08C23/04 ,  G08C2201/20

Abstract: Circuitry using infra-red (IR) diodes in remote control units. In one embodiment an IR LED is used both as a transmitter diode and also as a receiver diode responsive to light to thereby develop photocurrents and/or voltages for use by external circuitry. In a second embodiment an improved amplifier circuit is provided for an IR LED and IR photo detector diode which is mounted behind, and receives light through, the transmitter IR LED.