公开(公告)号：US09379554B2

公开(公告)日：2016-06-28

申请号：US14076316

申请日：2013-11-11

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Daisuke Hatori ,  Youichi Iwano

IPC: H02J4/00 ,  G05F1/56

CPC classification number: H02J4/00 ,  G05F1/561 ,  Y10T307/549

Abstract: A current output circuit for a two-wire transmitter includes a first current source circuit configured to output a first current controlled by a control voltage generated based on a physical quantity, a second current source circuit configured to output a second current controlled by the first current, a first shunt voltage source circuit configured to generate an internal power source of the two-wire transmitter from the second current, a third current source circuit configured to generate a third current controlled by a reference voltage, and a second shunt voltage source circuit configured to generate a power source of the second current source circuit by the third current. The current output circuit is configured to output a predetermined current controlled by the control voltage based on the first current, the second current and the third current to an external circuit through two transmission lines.

Abstract translation: 一种用于双线发射机的电流输出电路包括：第一电流源电路，被配置为输出由基于物理量产生的控制电压控制的第一电流;第二电流源电路，被配置为输出由第一电流控制的第二电流 ，第一分流电压源电路，被配置为从所述第二电流产生所述二线制发射机的内部电源，被配置为产生由参考电压控制的第三电流的第三电流源电路和被配置为 以通过第三电流产生第二电流源电路的电源。 电流输出电路被配置为通过两条传输线将基于第一电流，第二电流和第三电流的控制电压控制的预定电流输出到外部电路。

公开(公告)号：US09214853B2

公开(公告)日：2015-12-15

申请号：US14077904

申请日：2013-11-12

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Daisuke Hatori

IPC: H02M1/36 ,  G05F3/08 ,  G08C19/02 ,  G08C19/00

CPC classification number: H02M1/36 ,  G05F3/08 ,  G08C19/00 ,  G08C19/02

Abstract: A two-wire transmitter starter circuit is configured to stably supply power at the time of start-up. The two-wire transmitter starter circuit includes a starter current generation circuit. The starter current generation circuit is connected in parallel with a current conversion unit configured to convert a detection signal of a sensor to a predetermined DC current. The starter current generation circuit includes a first series circuit where a first resistor and a shunt regulator are connected in series, and a second series circuit where a switching element and a second resistor are connected in series. The shunt regulator includes a first control terminal connected to a connection point of the switching element and the second resistor. The switching element includes a second control terminal connected to a connection point of the first resistor and the shunt regulator.

Abstract translation: 双线发射器起动电路被配置为在启动时稳定地供电。 双线发射机起动电路包括起动电流发生电路。 起动电流发生电路与被配置为将传感器的检测信号转换为预定直流电流的电流转换单元并联连接。 起动电流产生电路包括串联连接有第一电阻和并联稳压器的第一串联电路，以及开关元件和第二电阻串联连接的第二串联电路。 并联调节器包括连接到开关元件和第二电阻器的连接点的第一控制端子。 开关元件包括连接到第一电阻器和分流调节器的连接点的第二控制端子。

公开(公告)号：US10063217B2

公开(公告)日：2018-08-28

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 ,  G01C19/5776 ,  H03B5/30

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.