公开(公告)号：US08890617B2

公开(公告)日：2014-11-18

申请号：US13741592

申请日：2013-01-15

Applicant: QUALCOMM Incorporated

Inventor： Thomas Domenick Marra ,  Aristotele Hadjichristos ,  Nathan M. Pletcher

IPC: H03G3/10

CPC classification number: H03F1/301 ,  H03F1/30 ,  H03F3/04 ,  H03F3/189

Abstract: Techniques for monitoring and controlling bias current of amplifiers are described. In an exemplary design, an apparatus may include an amplifier and a bias circuit. The amplifier may include at least one transistor coupled to an inductor. The bias circuit may generate at least one bias voltage for the at least one transistor in the amplifier to obtain a target bias current for the amplifier. The bias circuit may generate the at least one bias voltage based on a voltage across the inductor in the amplifier, or a current through a current mirror formed with one of the at least one transistor in the amplifier, or a gate-to-source voltage of one of the at least one transistor in the amplifier, or a voltage in a replica circuit replicating the amplifier, or a current applied to the amplifier with a switched mode power supply disabled.

Abstract translation: 描述了用于监视和控制放大器偏置电流的技术。 在示例性设计中，装置可以包括放大器和偏置电路。 放大器可以包括耦合到电感器的至少一个晶体管。 偏置电路可以为放大器中的至少一个晶体管产生至少一个偏置电压，以获得放大器的目标偏置电流。 偏置电路可以基于放大器中的电感器两端的电压或通过放大器中的至少一个晶体管中的一个形成的电流镜的电流或栅极至源极电压来产生至少一个偏置电压 放大器中的至少一个晶体管中的一个，或复制放大器的复制电路中的电压，或禁用开关模式电源的施加到放大器的电流。