公开(公告)号：US20160072448A1

公开(公告)日：2016-03-10

申请号：US14746124

申请日：2015-06-22

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Francesco CARRARA ,  Felice Alberto TORRISI ,  Francesco CLERICI

IPC: H03F1/08 ,  H03F3/45 ,  H03F1/02

CPC classification number: H03F1/086 ,  H03F1/0205 ,  H03F1/083 ,  H03F3/45085 ,  H03F3/45179 ,  H03F3/45502 ,  H03F3/45511 ,  H03F2200/456 ,  H03F2203/45008 ,  H03F2203/45116 ,  H03F2203/45288 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45431

Abstract: A common-mode feedback circuit includes a transconductor input stage with differential input terminals, and a frequency-compensated gain stage coupled to the transconductor input stage with differential output terminals. The common-mode feedback circuit also includes a feedback loop having a comparator configured to produce a feedback error signal for the transconductor input stage by comparing with a reference a common-mode sensing signal indicative of a common-mode voltage level sensed at the differential output terminals. In addition, the common-mode feedback loop includes a converter for converting the common-mode voltage level sensed at said differential output terminals into a current signal coupled to the comparator.

Abstract translation: 共模反馈电路包括具有差分输入端的跨导体输入级，以及耦合到具有差分输出端的跨导体输入级的频率补偿增益级。 共模反馈电路还包括反馈回路，其具有比较器，该比较器被配置为通过与参考相比较来产生用于跨导体输入级的反馈误差信号，该共模检测信号表示在差分输出处感测到的共模电压电平 终端。 此外，共模反馈环路包括用于将在所述差分输出端子处感测的共模电压电平转换为耦合到比较器的电流信号的转换器。