公开(公告)号：US09503053B1

公开(公告)日：2016-11-22

申请号：US14711493

申请日：2015-05-13

Applicant: QUALCOMM Incorporated

Inventor： Sunyoung Kim ,  Cheng-Han Wang

IPC: H03F3/45 ,  H03H11/32 ,  H03F3/193

CPC classification number: H03H11/32 ,  H03F3/193 ,  H03F3/265 ,  H03F3/45654 ,  H03F2200/451

Abstract: An active balun uses two inverters to produce a differential output from a single-ended input. A current source supplies current to both inverters and a current sink sinks current from both inverters. The inverters include bias resistors coupled between their inputs and outputs. A coupling capacitor couples the output of the first inverter to the input of the first inverter. Values of the bias resistors and the coupling capacitor may selected to assure stability of the active balun. The values may be programmable, for example, based on a desired operating frequency. The current source may be biased by a common-mode feedback circuit based on the common-mode voltage of the differential output.

Abstract translation: 主动平衡 - 不平衡变压器使用两个逆变器从单端输入产生差分输出。 电流源为两个逆变器提供电流，并且电流吸收器从两个逆变器吸收电流。 逆变器包括耦合在其输入和输出之间的偏置电阻。 耦合电容将第一反相器的输出耦合到第一反相器的输入端。 可以选择偏置电阻器和耦合电容器的值以确保主动平衡 - 不平衡变压器的稳定性。 这些值可以是可编程的，例如，基于期望的操作频率。 基于差分输出的共模电压，可以通过共模反馈电路来偏置电流源。

公开(公告)号：US20160336921A1

公开(公告)日：2016-11-17

申请号：US14711493

申请日：2015-05-13

Applicant: QUALCOMM Incorporated

Inventor： Sunyoung Kim ,  Cheng-Han Wang

IPC: H03H11/32 ,  H03F3/193

CPC classification number: H03H11/32 ,  H03F3/193 ,  H03F3/265 ,  H03F3/45654 ,  H03F2200/451

Abstract: An active balun uses two inverters to produce a differential output from a single-ended input. A current source supplies current to both inverters and a current sink sinks current from both inverters. The inverters include bias resistors coupled between their inputs and outputs. A coupling capacitor couples the output of the first inverter to the input of the first inverter. Values of the bias resistors and the coupling capacitor may selected to assure stability of the active balun. The values may be programmable, for example, based on a desired operating frequency. The current source may be biased by a common-mode feedback circuit based on the common-mode voltage of the differential output.

Abstract translation: 主动平衡 - 不平衡变压器使用两个逆变器从单端输入产生差分输出。 电流源为两个逆变器提供电流，并且电流吸收器从两个逆变器吸收电流。 逆变器包括耦合在其输入和输出之间的偏置电阻。 耦合电容将第一反相器的输出耦合到第一反相器的输入端。 可以选择偏置电阻器和耦合电容器的值以确保主动平衡 - 不平衡变压器的稳定性。 这些值可以是可编程的，例如，基于期望的操作频率。 基于差分输出的共模电压，可以通过共模反馈电路来偏置电流源。