公开(公告)号：US20150341018A1

公开(公告)日：2015-11-26

申请号：US14717046

申请日：2015-05-20

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Daisuke HATORI ,  Takashi YOSHIDA ,  Tadahiko TAKAYAMA ,  Yusaku YOSHIDA

IPC: H03K3/01 ,  H02J4/00

CPC classification number: H03K3/01 ,  G01C19/5776 ,  H02J4/00 ,  H03B5/30 ,  Y10T307/658

Abstract: A current-to-voltage conversion circuit according to one aspect of the present invention includes a first resistor, a first current source, a first capacitor, a first output terminal, a first voltage source, a first transistor, and a second resistor. The first resistor includes a first end and a second end. The first end of the first resistor is connectable to an electrode included in a sensor and the second end of the first resistor is connected to a first electrical potential. The first capacitor includes a first end and a second end. The first end of the first capacitor is connected to the first end of the first resistor and the second end of the first capacitor is connected to the first current source. The first transistor includes a first terminal, a second terminal, and a control terminal. The first terminal is connected to the second end of the first capacitor, the second terminal is connected to the first output terminal, and the control terminal is connected to the first voltage source. The second resistor includes a first end connected to the second terminal and a second end connected to a second electrical potential.

Abstract translation: 根据本发明的一个方面的电流 - 电压转换电路包括第一电阻器，第一电流源，第一电容器，第一输出端子，第一电压源，第一晶体管和第二电阻器。 第一电阻器包括第一端和第二端。 第一电阻器的第一端可连接到包括在传感器中的电极，并且第一电阻器的第二端连接到第一电位。 第一电容器包括第一端和第二端。 第一电容器的第一端连接到第一电阻器的第一端，第一电容器的第二端连接到第一电流源。 第一晶体管包括第一端子，第二端子和控制端子。 第一端子连接到第一电容器的第二端，第二端子连接到第一输出端子，并且控制端子连接到第一电压源。 第二电阻器包括连接到第二端子的第一端和连接到第二电位的第二端。