公开(公告)号：US20070285166A1

公开(公告)日：2007-12-13

申请号：US11467170

申请日：2006-08-25

申请人： Tim K. SHIA ,  Chi-Chen Chung ,  Long-Xi Chang

发明人： Tim K. SHIA ,  Chi-Chen Chung ,  Long-Xi Chang

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  G11C7/062 ,  H03F1/34 ,  H03F3/393 ,  H03F3/45928 ,  H03F2200/213 ,  H03F2200/264 ,  H03F2203/45078 ,  H03F2203/45101 ,  H03F2203/45134 ,  H03F2203/45138 ,  H03F2203/45424 ,  H03F2203/45512 ,  H03F2203/45586 ,  H03F2203/45588

摘要： A fully differential sensing apparatus and an input common mode feedback circuit are provided. The input common mode feedback circuit includes a common mode error amplifier and a plurality of adaptive conductance elements. Each adaptive conductance element behaves with a low impedance characteristic when its anode voltage is greater than its cathode voltage by a positive threshold voltage or, on the contrary, when the anode voltage of such an adaptive conductance element is lower than its cathode voltage by a negative threshold voltage, the adaptive element also behaves with a low impedance characteristic; otherwise the aforementioned adaptive conductance element behaves with a high impedance characteristic. The common mode error amplifier and a plurality of such adaptive conductance elements form a negative feedback loop to effectively maintain the input common voltage of a fully differential input amplifier, which can be used for a fully differential sensing apparatus.

摘要翻译： 提供全差分感测装置和输入共模反馈电路。 输入共模反馈电路包括共模误差放大器和多个自适应电导元件。 当其阳极电压大于其阴极电压的正阈值电压时，每个自适应电导元件都具有低阻抗特性，或者相反，当这种自适应电导元件的阳极电压低于其阴极电压为负 阈值电压，自适应元件也具有低阻抗特性; 否则上述自适应电导元件具有高阻抗特性。 共模误差放大器和多个这样的自适应电导元件形成负反馈回路以有效地保持全差分输入放大器的输入公共电压，其可以用于全差分感测装置。