公开(公告)号：BR8108440A

公开(公告)日：1982-03-09

申请号：BR8108440

申请日：1981-03-16

Applicant: MOTOROLA INC

Inventor： FREIMARK R ,  SHAW M

IPC: G01L9/00 ,  G01D3/036 ,  G01L9/06 ,  G01L19/04 ,  G08C19/00 ,  G08C25/00 ,  H03F1/30 ,  H03F3/04

Abstract: An amplifier circuit is disclosed for temperature compensating the output voltage thereof with respect to undesirable temperature induced signals from a silicon pressure transducer and/or from components of the amplifier itself. The amplifier includes a first operational amplifier and a second operational amplifier. A first circuit connects the output terminal of the first operational amplifier through a summing node to one input terminal of the second amplifier. Output signals from the pressure transducer are applied between one input terminal of the first operational amplifier and another input terminal of the second amplifier. A temperature compensating circuit is connected to the summing node for enabling the output voltage of the amplifier to be substantially independent of temperature. An initial offset voltage compensating circuit is coupled to the summing node for adjusting the intercept of the pressure-to-output voltage transfer curve. The gain of the second operational amplifier determines the slope of the curve.

公开(公告)号：WO1981003094A1

公开(公告)日：1981-10-29

申请号：PCT/US1981000375

申请日：1981-03-16

Applicant: MOTOROLA INC

Inventor： MOTOROLA INC ,  SHAW M ,  FREIMARK R

IPC: H03F03/04

CPC classification number: G01L9/045 ,  G01D3/036 ,  H03F1/302

Abstract: Amplifier circuit for temperature compensating the output voltage thereof with respect to undesirable temperature induced signals from a silicon pressure transducer (10) and/or from components of the amplifier itself. The amplifier includes a first operational amplifier (50) and a second operational amplifier (68). A first circuit connects the output terminal of the first operational amplifier through a summing node (66) to one input terminal (70) of the second amplifier. Output signals from the pressure transducer are applied between one input terminal (52) of the first operational amplifier and another input terminal (72) of the second amplifier. A temperature compensating circuit (116) is connected to the summing node for enabling the output voltage of the amplifier to be substantially independent of temperature. An initial offset voltage compensating circuit (80) is coupled to the summing node for adjusting the intercept of the pressure-to-output voltage transfer curve. The gain of the second operational amplifier determines the slope of the curve.

Abstract translation: 用于相对于来自硅压力传感器（10）和/或放大器本身的组件的不期望的温度感应信号来温度补偿其输出电压的放大器电路。 放大器包括第一运算放大器（50）和第二运算放大器（68）。 第一电路将第一运算放大器的输出端通过求和节点（66）连接到第二放大器的一个输入端（70）。 来自压力传感器的输出信号被施加在第一运算放大器的一个输入端（52）和第二放大器的另一个输入端（72）之间。 温度补偿电路（116）连接到求和节点，用于使放大器的输出电压基本上与温度无关。 初始偏移电压补偿电路（80）耦合到求和节点，用于调整压力 - 输出电压传递曲线的截距。 第二运算放大器的增益决定曲线的斜率。