公开(公告)号：US09236839B2

公开(公告)日：2016-01-12

申请号：US14018291

申请日：2013-09-04

Applicant: STMicroelectronics S.r.I.

Inventor： Michele Laplaca

IPC: H03F3/26 ,  H03F3/18 ,  H03F1/02 ,  H03F3/21 ,  H03F3/30

CPC classification number: H03F3/26 ,  H03F1/0244 ,  H03F1/0277 ,  H03F3/211 ,  H03F3/3066

Abstract: A Class-G amplifier including a first and second driving transistor configured to receive an input voltage; a first supplying terminal connected to the first driving transistor to supply a first supplying voltage. The amplifier also comprises: a second supplying terminal connected to the second driving transistor to supply a second supplying voltage in absolute value higher than said first voltage; a first power transistor connected to the first driving transistor to form a first Sziklai pair structured to be activated by a first input voltage lower in absolute value than the first supplying voltage; a second power transistor connected to the second driving transistor to form a second Sziklai pair structured to be activated by an input signal comprised between the first supplying voltage and the second supplying voltage.

Abstract translation: 一种G类放大器，包括被配置为接收输入电压的第一和第二驱动晶体管; 连接到第一驱动晶体管以提供第一供电电压的第一供电端子。 放大器还包括：第二供电端子，连接到第二驱动晶体管，以提供高于所述第一电压的绝对值的第二供电电压; 连接到第一驱动晶体管的第一功率晶体管，以形成由绝对值比第一供电电压低的第一输入电压激活的第一Sziklai对; 连接到第二驱动晶体管的第二功率晶体管，以形成由第一供电电压和第二供电电压之间的输入信号激活的第二Sziklai对。