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Infrared signal communication system and method including transmission means having automatic gain control

  • US 7,123,840 B2
  • Filed: 01/22/2003
  • Issued: 10/17/2006
  • Est. Priority Date: 08/10/1998
  • Status: Expired due to Fees
First Claim
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1. A device, comprising:

  • a transmitter circuit that includes a transmitter driver;

    an infrared transmitter that receives an amplified signal from the transmitter driver, wherein the amplified signal contains transmit data, wherein the infrared transmitter transmits a transmitted infrared signal that contains the transmit data, and wherein the transmitted infrared signal has a transmit power level;

    an infrared receiver that receives an incident infrared signal, wherein the incident infrared signal contains receive data and exhibits an incident power level; and

    a receiver circuit coupled to the infrared receiver, wherein the receiver circuit outputs both the receive data and a control signal, wherein the control signal has an amplitude that depends on the incident power level, and wherein the transmit power level varies in proportion to the amplitude of the control signal.

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