Patent ID: 6973183

Claim:
A communication device including circuitry operable to facilitate dynamic impedance matching, the circuitry comprising: an image impedance operable to be coupled to a receiver/transmitter pair associated with a line impedance; matching circuitry coupled to the line impedance and the image impedance, the matching circuitry comprising; a first current transformer coupled to the line impedance and operable to transfer a first current associated with the line impedance to a termination impedance for the matching circuitry; a second current transformer coupled to the image impedance and operable to transfer a second current associated with the image impedance to the termination impedance for the matching circuitry, the termination impedance coupled between the first and second transformers; and a first control circuit coupled to the first and second current transformers, the first control circuit operable to detect a current mismatch between the first and second currents, to generate a first control signal based at least in part on the detected current mismatch, and to communicate the first control signal to at least a portion of the image impedance; and a second control circuit coupled to the first and second current transformers, the second control circuit operable to detect a current mismatch between the first and second currents, to generate a second control signal based at least in part on the detected current mismatch, and to communicate the second control signal to at least a portion of the image impedance, wherein at least one of the first and second control circuits is coupled in parallel with the termination impedance; wherein the image impedance is operable to be varied to more closely match the line impedance based at least in part on the first and second control signals.