| 摘要 |
A system and method for a fast stabilizing output buffer. A differential driver circuit is provided with an amplifier stage for receiving a differential input signal and generating a differential output based upon the input signal. The differential output has a corresponding common-mode (CM) voltage level typically based upon a value half of the power supply. A common-mode feedback buffer (CMFB) stage detects a change in the CM voltage level and recovers the CM voltage level to its desired value within a very fast settling time based upon a very high bus frequency. The CMFB stage utilizes a topology comprising only a single device. In one embodiment, this single device is a nmos transistor utilized as a transimpedance stage. Stability is provided by a circuit biasing stage and a shunting capacitor within the CMFB stage. |
