公开(公告)号：US07057454B2

公开(公告)日：2006-06-06

申请号：US10855861

申请日：2004-05-27

Applicant: Fan Yang Ma ,  Wen Yu

Inventor： Fan Yang Ma ,  Wen Yu

IPC: H03F1/36

CPC classification number: H03G1/0088

Abstract: A DSM variable high-gain circuit includes a differential amplifier and a negative feedback loop comprising low resistance poly resistors and switches configured in a T-structure having a junction point as part of the negative feedback loop. A third resistor branch of the T-structure includes a switch that connects the junction point through the third resistor branch to ground when in a closed state and that turns the third resistor branch into an open circuit when in an open state The switch of the third resistor branch, when in the closed state, produces a gain at the output of the variable high-gain circuit.

Abstract translation: DSM可变高增益电路包括差分放大器和负反馈回路，其包括以具有作为负反馈回路的一部分的连接点的T形结构中配置的低电阻多电阻器和开关。 T型结构的第三电阻器支路包括开关，当处于闭合状态时，将通过第三电阻器分支的接合点连接到地，并且当处于断开状态时将第三电阻器分支转变为开路。第三个开关 当处于闭合状态时，电阻分支在可变高增益电路的输出端产生增益。