Patent ID: 7218860
Filing Date: 2007-05-15
Classification: H04B

Abstract:
1. An optical transceiver module comprising: a transmitter device for transforming electrical signals into optical signals, a receiver device for transforming optical signals into electrical signals, receiver circuitry for processing the electrical signals from the receiver device to produce a receiver data output, and ambient light circuitry for processing the electrical signals from the receiver device, wherein the ambient light circuitry has a supply current consumption that is independent of the electrical signals from the receiver device, and wherein the supply current consumption of the ambient light circuitry is made independent of the electrical signals from the receiver by using a high-gain amplifier in the ambient light circuitry that measures a voltage across at least one sense resistor that is in series with a supply voltage input line of the module that supplies a supply voltage to the module, and wherein the ambient light circuitry produces an ambient light output that is based on the measured voltage across said at least one sense resistor, and wherein the ambient light circuitry, transmitter device, receiver device and receiver circuitry are packaged together in the module.