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公开(公告)号：US10436843B2
公开(公告)日：2019-10-08
申请号：US15528255
申请日：2014-11-21
IPC分类号： G01R31/327 , G05F1/56
摘要： A system and method according to various embodiments can include a programmable current sink circuit that comprises a digital-to-analog converter (DAC). The DAC is programmable to set an adjustable magnitude of current sink so that a proper amount of current is jointly sunk from a plurality of inputs to generate a total sink current. With the adjustable current sink, redundant inputs, such as dual modular redundancy or triple modular redundancy, or simplex inputs can jointly sink the proper amount of current.
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公开(公告)号：US10014872B2
公开(公告)日：2018-07-03
申请号：US15532675
申请日：2014-12-03
摘要： Provided is programmable circuit for interfacing with a field device. The circuit includes only one analog-to-digital converter (ADC) configured to receive from the field device one from the group including a current signal and a voltage signal. The received one signal has frequency shift keying tones (FSK) superimposed thereon, the ADC being configured to extract information from the received one signal and the FSK tones simultaneously. Also included is only one digital-to-analog converter configured to drive an output signal to the field device, the output signal (i) including one from the group including a current signal and a voltage signal and (ii) being summed with an FSK-modulated signal.
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公开(公告)号：US10862535B2
公开(公告)日：2020-12-08
申请号：US15507398
申请日：2014-08-28
IPC分类号： G05F1/10 , G05F3/02 , H04B3/54 , G08C19/02 , H04B3/50 , G05B19/05 , G05F1/46 , G08C19/38 , H04B3/00 , H04L5/14 , H04L27/32
摘要： A system for coupling a modulated voltage signal onto a current loop between a host device and a field device, in various embodiments, can include a circuit and an impedance bridge. The circuit is configured to flow current from the field device between two terminals of an input circuit in the host device, wherein the two terminals are included in the current loop. The impedance bridge is positioned between the two terminals and configured to modulate impedance to convert the current in a field loop produced by the field device into terminal voltage modulation, without introducing a DC voltage burden to the current.
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公开(公告)号：US09008197B2
公开(公告)日：2015-04-14
申请号：US13952354
申请日：2013-07-26
发明人： Daniel Milton Alley , Bruce Henderson , Vitaly Alexandrovich Tkachuk , Longhui Shen , Ye Xu , Alan Carroll Lovell
CPC分类号： H04B3/54 , H04L12/40032
摘要： Systems for communicating over a communication interface are provided. An integrated circuit includes circuitry for monitoring a current flowing between two terminals of the integrated circuit. The integrated circuit also includes a voltage driver circuit for modulating a voltage between two terminals of the integrated circuit. The voltage driver modulates the voltage across the two terminals of the integrated circuit to encode data according to the Highway Addressable Remote Transducer protocol.
摘要翻译： 提供了通过通信接口进行通信的系统。 集成电路包括用于监视在集成电路的两个端子之间流动的电流的电路。 集成电路还包括用于调制集成电路的两个端子之间的电压的电压驱动器电路。 电压驱动器调制集成电路两端的电压，以根据高速公路可寻址远程传感器协议对数据进行编码。
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公开(公告)号：US20150030089A1
公开(公告)日：2015-01-29
申请号：US13952354
申请日：2013-07-26
发明人： Daniel Milton Alley , Bruce Henderson , Vitaly Alexandrovich Tkachuk , Longhui Shen , Ye Xu , Alan Carroll Lovell
IPC分类号： H04B3/54
CPC分类号： H04B3/54 , H04L12/40032
摘要： Systems for communicating over a communication interface are provided. An integrated circuit includes circuitry for monitoring a current flowing between two terminals of the integrated circuit. The integrated circuit also includes a voltage driver circuit for modulating a voltage between two terminals of the integrated circuit. The voltage driver modulates the voltage across the two terminals of the integrated circuit to encode data according to the Highway Addressable Remote Transducer protocol.
摘要翻译： 提供了通过通信接口进行通信的系统。 集成电路包括用于监视在集成电路的两个端子之间流动的电流的电路。 集成电路还包括用于调制集成电路的两个端子之间的电压的电压驱动器电路。 电压驱动器调制集成电路两端的电压，以根据高速公路可寻址远程传感器协议对数据进行编码。
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