| 发明名称 |
FAULT PROTECTION OF A VOLTAGE DIFFERENTIAL TRANSFORMER (VDT) EXCITATION CIRCUIT |
| 摘要 |
An excitation circuit includes an operational amplifier, a transistor circuit, a switch, and a pull-down resistor. The operational amplifier receives an excitation input voltage at a non-inverting input and provides an operational amplifier output. The transistor circuit receives the operational amplifier output and provides a transistor circuit output. The transistor circuit output is connected to an inverting input of the operational amplifier. The switch is connected between the operational amplifier output and the transistor circuit. The switch is opened to disconnect the operational amplifier output from the transistor circuit. The pull-down resistor is connected between an output of the switch and ground, wherein the pull-down resistor turns off the transistor circuit when the analog switch is opened. |
| 申请公布号 |
US2015280422(A1) |
申请公布日期 |
2015.10.01 |
| 申请号 |
US201414227004 |
申请日期 |
2014.03.27 |
| 申请人 |
Hamilton Sundstrand Corporation |
发明人 |
Harvey Nicholas C.;Jonke Christopher J.;Avritch Steven A. |
| 分类号 |
H02H7/04;H02H3/08 |
主分类号 |
H02H7/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An excitation shutoff circuit comprising:
an operational amplifier configured to receive an excitation input voltage at a non-inverting input and provides an operational amplifier output; a transistor circuit configured to receive the operational amplifier output and to provide a transistor circuit output, wherein the transistor circuit output is connected to an inverting input of the operational amplifier; a switch connected between the operational amplifier output and the transistor circuit, wherein the switch is configured to disconnect the operational amplifier output from the transistor circuit by opening of the switch; and a pull-down resistor connected between an output of the switch and ground, so as to turn off the transistor circuit when the analog switch is opened. |
| 地址 |
Charlotte NC US |
