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1.发明授权Fault protection of a variable differential transformer (VDT) excitation circuit 有权可变差动变压器（VDT）励磁电路的故障保护公开(公告)号：US09214802B2
公开(公告)日：2015-12-15
申请号：US14227004
申请日：2014-03-27
Applicant: Hamilton Sundstrand Corporation
Inventor： Nicholas C. Harvey , Christopher J. Jonke , Steven A. Avritch
Abstract: 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 switch is opened.
Abstract translation: 励磁电路包括运算放大器，晶体管电路，开关和下拉电阻。 运算放大器在非反相输入端接收激励输入电压，并提供运算放大器输出。 晶体管电路接收运算放大器输出并提供晶体管电路输出。 晶体管电路输出连接到运算放大器的反相输入端。 开关连接在运算放大器输出和晶体管电路之间。 打开开关以断开晶体管电路的运算放大器输出。 下拉电阻连接在开关的输出和地之间，其中当开关断开时，下拉电阻关断晶体管电路。
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2.发明申请FAULT PROTECTION OF A VOLTAGE DIFFERENTIAL TRANSFORMER (VDT) EXCITATION CIRCUIT 有权电压差动变压器（VDT）励磁电路的故障保护公开(公告)号：US20150280422A1
公开(公告)日：2015-10-01
申请号：US14227004
申请日：2014-03-27
Applicant: Hamilton Sundstrand Corporation
Inventor： Nicholas C. Harvey , Christopher J. Jonke , Steven A. Avritch
Abstract: 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.
Abstract translation: 励磁电路包括运算放大器，晶体管电路，开关和下拉电阻。 运算放大器在非反相输入端接收激励输入电压，并提供运算放大器输出。 晶体管电路接收运算放大器输出并提供晶体管电路输出。 晶体管电路输出连接到运算放大器的反相输入端。 开关连接在运算放大器输出和晶体管电路之间。 打开开关以断开晶体管电路的运算放大器输出。 下拉电阻连接在开关的输出和地之间，其中当模拟开关断开时，下拉电阻关断晶体管电路。
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