基本信息:
- 专利标题： FAST COMMON MODE FEEDBACK CONTROL FOR DIFFERENTIAL DRIVER
- 专利标题（中）：用于差分驱动器的快速共同模式反馈控制
- 申请号：PCT/US2010/025208 申请日：2010-02-24
- 公开(公告)号：WO2010099183A1 公开(公告)日：2010-09-02
- 发明人： BELL, Marshall J.
- 申请人： STANDARD MICROSYSTEMS CORPORATION , BELL, Marshall J.
- 申请人地址： 80 Arkay Drive Hauppauge, New York 11788 US
- 专利权人： STANDARD MICROSYSTEMS CORPORATION,BELL, Marshall J.
- 当前专利权人： STANDARD MICROSYSTEMS CORPORATION,BELL, Marshall J.
- 当前专利权人地址： 80 Arkay Drive Hauppauge, New York 11788 US
- 代理机构： MEYERTONS, HOOD, KIVLIN, KOWERT & GOETZEL, P.C.
- 优先权： US12/391,414 20090224
- 主分类号： H03F3/45
- IPC分类号： H03F3/45 ; H04L25/02
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.
摘要（中）：
用于快速稳定输出缓冲器的系统和方法。 差分驱动器电路具有用于接收差分输入信号并基于输入信号产生差分输出的放大器级。 差分输出具有通常基于电源的一半值的对应的共模（CM）电压电平。 共模反馈缓冲器（CMFB）级检测CM电压电平的变化，并且基于非常高的总线频率在非常快的建立时间内将CM电压电平恢复到其期望值。 CMFB阶段使用仅包含单个设备的拓扑。 在一个实施例中，该单个器件是用作跨阻抗级的nmos晶体管。 稳定性由CMFB级内的电路偏置级和分流电容提供。