A 0.45-0.7 V 1-6 Gb/s 0.29-0.58 pJ/b Source-Synchronous Transceiver Using Near-Threshold Operation.

A low-power source-synchronous multi-Gb/s transceiver is presented. Supply voltage is aggressively scaled to reduce power, and the speed penalty resulting from low-voltage operation is overcome by multiplexing transmitter/receiver synchronized by low-rate multi-phase clocks. Phase spacing errors incurred by device mismatches are corrected using a self-calibration scheme. The proposed phase calibra...