Disclosed herein are circuitry and methods for transmitting data across a parallel bus using both high common mode and low common mode signaling. The transmitter stages are configured to work with two of three possible power supply voltages: a high Vddq voltage, a low Vssq voltage, and an intermediate...http://www.google.com.tw/patents/US8159270?utm_source=gb-gplus-share專利 US8159270 - Circuitry and methods minimizing output switching noise through split-level signaling and bus division enabled by a third power supply
