公开(公告)号：US20020140510A1

公开(公告)日：2002-10-03

申请号：US10106875

申请日：2002-03-26

Applicant: STMicroelectronics S.A.

Inventor： Patrice Garcia ,  Didier Belot

IPC: H03G003/10

CPC classification number: H03G1/0088

Abstract: An amplifier device with gain switching includes an amplifier, and a configurable load circuit including an inductive element. The configurable load circuit is capable of exhibiting two configurations having two different impedance values. A controllable switch is connected between the amplifier and the load circuit to select one of the two configurations of the load circuit. The load circuit includes two insulated-gate field effect load transistors connected in series, and which operate in a triode mode. The inductive element is connected in parallel with the pair of load transistors, and between a power supply terminal and the switching circuit.

Abstract translation: 具有增益切换的放大器装置包括放大器和包括电感元件的可配置负载电路。 可配置负载电路能够呈现具有两个不同阻抗值的两种配置。 放大器和负载电路之间连接一个可控开关，选择负载电路的两种配置之一。 负载电路包括两个串联连接的绝缘栅场效应负载晶体管，工作在三极管模式。 电感元件与一对负载晶体管并联连接在电源端子和开关电路之间。