Patent ID: 6342843
Filing Date: 2002-01-29
Classification: G06K,H04Q

Abstract:
A communications system comprising:a radio frequency identification device including an integrated circuit having a microprocessor, a receiver coupled to the microprocessor, and a transmitter coupled to the microprocessor, the integrated circuit having a first, digital output, the receiver being configured to receive wireless communications from a remote interrogator; and a digital to analog converter external of the integrated circuit and having a first, digital, input coupled to the first output of the integrated circuit, having an analog output configured to be coupled to an analog device, and having a second input which, in response to being triggered, effects a digital to analog conversion, wherein the radio frequency identification device is configured to receive a wireless signal, indicative of a digital value to be applied to the digital to analog converter, from the transmitter and to transfer the digital value to the digital to analog converter.