公开(公告)号：US3906338A

公开(公告)日：1975-09-16

申请号：US51001574

申请日：1974-09-27

Applicant: ROSEMOUNT INC

Inventor： GRINDHEIM EARL A

IPC: G01L1/22 ,  G01L9/04 ,  G08C19/02 ,  G08C19/04

CPC classification number: G01L9/04 ,  G01L1/225 ,  G08C19/02 ,  Y10S323/909

Abstract: Circuitry including a resistance sensor is excited by an external power source. A reference voltage is established, the voltage developed across the sensor resistance is compared at an amplifier input with a reference voltage signal and the voltage across a feedback resistor, and the total current drawn through the circuitry adjusts as a function of the sensor resistance to give a balanced amplifier input. Total current may be made a linear function of sensor resistance or a non-linear function by proper selection of certain resistors.

Abstract translation: 包括电阻传感器的电路由外部电源激发。 建立参考电压，在放大器输入与参考电压信号和反馈电阻两端的电压之间比较传感器电阻上产生的电压，并且通过电路汲取的总电流根据传感器电阻进行调整，以提供传感器电阻 平衡放大器输入。 通过适当选择某些电阻，总电流可以成为传感器电阻的线性函数或非线性函数。

公开(公告)号：US3859594A

公开(公告)日：1975-01-07

申请号：US1474870

申请日：1970-02-24

Applicant: ROSEMOUNT INC

Inventor： GRINDHEIM EARL A

IPC: G01L1/22 ,  G01L9/04 ,  G08C19/02 ,  G01R27/00

CPC classification number: G01L9/04 ,  G01L1/225 ,  G08C19/02 ,  Y10S323/909

Abstract: Circuitry including a resistance sensor is excited by an external power source. A reference voltage is established, the voltage developed across the sensor resistance is compared at an amplifier input with a reference voltage signal and the voltage across a feedback resistor, and the total current drawn through the circuitry adjusts as a function of the sensor resistance to give a balanced amplifier input. Total current may be made a linear function of sensor resistance or a non-linear function by proper selection of certain resistors.

Abstract translation: 包括电阻传感器的电路由外部电源激发。 建立参考电压，在放大器输入与参考电压信号和反馈电阻两端的电压之间比较传感器电阻上产生的电压，并且通过电路汲取的总电流根据传感器电阻进行调整，以提供传感器电阻 平衡放大器输入。 通过适当选择某些电阻，总电流可以成为传感器电阻的线性函数或非线性函数。