公开(公告)号：US3922597A

公开(公告)日：1975-11-25

申请号：US41049973

申请日：1973-10-29

申请人： TOYODA CHUO KENKYUSHO KK

发明人： NAGASE HIROSHI

IPC分类号： G01L1/22

CPC分类号： G01L1/2281

摘要： A circuit for detecting a physical quantity which comprises a bridge circuit including four sensitive elements having a resistivity which is variable in proportion to a physical quantity to be applied thereto. A power supply is connected to two input terminals of the bridge circuit for applying a voltage thereacross, and a variable resistor comprising a resistor having a predetermined resistance and an adjustable tap is provided for nulling the bridge. The circuit is arranged such that the zero adjustment of the output voltage may be accomplished by adjusting the resistance value of the variable resistor without affecting the characteristics of the thermal zero shift of the bridge circuit to thereby accurately obtain the output voltage corresponding to the physical quantity applied.

摘要翻译： 一种用于检测物理量的电路，包括一个桥接电路，该桥接电路包括四个敏感元件，该敏感元件具有与要施加的物理量成比例的电阻率。 电源连接到桥接电路的两个输入端，用于施加电压，并且包括具有预定电阻的电阻器和可调节抽头的可变电阻器用于对桥进行归零。 电路布置成使得可以通过调节可变电阻器的电阻值而不影响桥接电路的热零位偏移的特性来实现输出电压的零点调整，从而精确地获得对应于物理量的输出电压 应用。

公开(公告)号：US3913392A

公开(公告)日：1975-10-21

申请号：US45028574

申请日：1974-03-12

申请人： TOYODA CHUO KENKYUSHO KK

发明人： NAGASE HIROSHI ,  BAN HITOSHI

IPC分类号： G01B7/16 ,  G01D3/036 ,  G01L9/06 ,  G01R17/14 ,  G01B7/18

CPC分类号： G01R17/14 ,  G01B7/18 ,  G01D3/036 ,  G01L9/065

摘要： A circuit for detecting a physical quantity has a detecting circuit including at least one semiconductor sensitive element, two input terminals and two output terminals, said semiconductor sensitive element has a resistivity which is variable in proportion to a physical quantity to be applied thereto, first power supply means connected to said two input terminals of said detecting circuit for applying a voltage thereacross, transistor means having an emitter, a base and a collector connected to one input terminal of said detecting circuit, said transistor means being disposed at a portion adjacent to said semiconductor sensitive element of said detecting circuit, second power supply means for applying a predetermined voltage to said base of said transistor means, and first resistor means having a predetermined resistance value connected to said first power supply means and said emitter of said transistor means. Accordingly, the shift of sensitivity of said detecting circuit due to a temperature change of said semiconductor sensitive element is compensated by the characteristics of the voltage change between the base and emitter of said transistor means in proportion to the change of the temperature, thereby an output voltage is generated between said two output terminals precisely in proportion to the physical quantity to be applied to said semiconductor sensitive element. Further improvements are disclosed eliminating the second power supply by using a biasing circuit, providing an impedance converter means to supply a voltage signal in proportion to a change in temperature at the input terminal of the detecting circuit, and providing negative feedback to increase the accuracy of detecting the physical quantity by controlling the output current to the detecting circuit.

摘要翻译： 用于检测物理量的电路具有包括至少一个半导体敏感元件，两个输入端子和两个输出端子的检测电路，所述半导体敏感元件具有与要施加的物理量成比例的电阻率，第一功率 供给装置，连接到所述检测电路的所述两个输入端，用于施加电压，所述晶体管装置具有与所述检测电路的一个输入端连接的发射极，基极和集电极，所述晶体管装置设置在与所述 所述检测电路的半导体敏感元件，用于向所述晶体管装置的所述基极施加预定电压的第二电源装置，以及连接到所述第一电源装置和所述晶体管装置的所述发射极的预定电阻值的第一电阻装置。