| 发明名称 | Current output circuit and two-wire transmitter | ||
| 摘要 | 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. | ||
| 申请公布号 | US9379554(B2) | 申请公布日期 | 2016.06.28 |
| 申请号 | US201314076316 | 申请日期 | 2013.11.11 |
| 申请人 | YOKOGAWA ELECTRIC CORPORATION | 发明人 | Hatori Daisuke;Iwano Youichi |
| 分类号 | H02J4/00;G05F1/56 | 主分类号 | H02J4/00 |
| 代理机构 | Sughrue Mion, PLLC | 代理人 | Sughrue Mion, PLLC |
| 主权项 | 1. A current output circuit for a two-wire transmitter configured to receive supply of a power source from an external circuit through two transmission lines and to output a predetermined current based on a physical quantity to the external circuit through the transmission lines, the current output circuit comprising: a first current source circuit configured to output a first current controlled by a control voltage generated based on the 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, wherein the current output circuit is configured to output the predetermined current controlled by the control voltage based on the first current, the second current and the third current. | ||
| 地址 | Tokyo JP | ||