Patent ID: 8055208

Claim:
A data communication system, comprising: a first transmission circuit in a first location for transmitting a signal; a first receiver circuit in a second location for receiving the transmitted signal, the first receiver circuit comprised of: a. an averaging circuit receiving said transmitted signal through a switch for producing an average signal representing an average level of the transmitted signal received by the first receiver circuit; and b. a comparator for comparing the average level of the average signal with the transmitted signal received by the first receiver circuit, wherein the comparator is turned on when the transmitted signal received by the first receiver circuit is above the average level and turned off when the transmitted signal received by the first receiver circuit is below the average level, wherein the switch is responsive to a feed back control signal from an output of the comparator that controls the switching of the transmitted signal received by the first receiver circuit through the switch to the averaging circuit; wherein the output of the comparator represents the signal transmitted from the first transmission circuit.