Patent ID: 7602274

Claim:
A remote keyless entry (RKE) transponder, comprising: a multi-channel analog front-end (AFE) and a plurality of antennas, wherein each channel of the multi-channel AFE is coupled to a one of the plurality of antennas; a tuning circuit for each channel of the multi-channel AFE, each tuning circuit having a plurality of tuning capacitors internal to the multi-channel AFE, wherein the tuning circuit couples a combination of the plurality of tuning capacitors to a respective one of the plurality of antennas so that the respective one of the plurality of antennas is tuned to a desired frequency; at least one antenna configuration register for storing each combination of the plurality of capacitors required for tuning each of the respective ones of the plurality of antennas; and a low frequency talk-back circuit for sending data back to a low frequency base station, wherein the low frequency talk-back circuit comprises a de-queuing circuit for clamping and unclamping a voltage on at least one of the plurality of antennas, wherein the dc-queuing circuit is controlled by an external control device.