公开(公告)号：US10659090B2

公开(公告)日：2020-05-19

申请号：US16016087

申请日：2018-06-22

Applicant: Rosemount Inc.

Inventor： John Edward Rodeheffer

IPC: H04B1/04

Abstract: A process transmitter includes a circuit producing a plurality of digital values representing magnitudes for an analog signal and a filter receiving the plurality of digital values and producing a plurality of filtered digital values. Output analog circuitry in the process transmitter is configured to receive the filtered digital values and output an analog signal on a communication channel of the process transmitter. The output analog circuitry has a transfer function and the filter has a transfer function. The transfer function of the filter at least partially offsets the transfer function of the output analog circuitry.

公开(公告)号：US20180087987A1

公开(公告)日：2018-03-29

申请号：US15279609

申请日：2016-09-29

Applicant: Rosemount Inc.

Inventor： John Edward Rodeheffer

IPC: G01L19/04 ,  G01L19/00 ,  G01L9/00

Abstract: A process transmitter includes an isolation unit, a process sensor, a compensation circuit, and an output circuit. The isolation unit is configured to engage a process and includes a medium. The process sensor is configured to produce a process signal that is a function of a parameter of the process that is communicated through the medium. The compensation circuit is configured to compensate the process signal for a response time of the isolation unit, and output a compensated process signal. The output circuit is configured to produce a transmitter output as a function of the compensated process signal.

公开(公告)号：US11226255B2

公开(公告)日：2022-01-18

申请号：US15279609

申请日：2016-09-29

Applicant: Rosemount Inc.

Inventor： John Edward Rodeheffer

IPC: G01L19/04 ,  G01L19/00 ,  G01L13/02 ,  G01L9/00 ,  G01L19/14

Abstract: A process transmitter includes an isolation unit, a process sensor, a compensation circuit, and an output circuit. The isolation unit is configured to engage a process and includes a medium. The process sensor is configured to produce a process signal that is a function of a parameter of the process that is communicated through the medium. The compensation circuit is configured to compensate the process signal for a response time of the isolation unit, and output a compensated process signal. The output circuit is configured to produce a transmitter output as a function of the compensated process signal.

公开(公告)号：US20190393909A1

公开(公告)日：2019-12-26

申请号：US16016087

申请日：2018-06-22

Applicant: Rosemount Inc.

Inventor： John Edward Rodeheffer

IPC: H04B1/04

Abstract: A process transmitter includes a circuit producing a plurality of digital values representing magnitudes for an analog signal and a filter receiving the plurality of digital values and producing a plurality of filtered digital values. Output analog circuitry in the process transmitter is configured to receive the filtered digital values and output an analog signal on a communication channel of the process transmitter. The output analog circuitry has a transfer function and the filter has a transfer function. The transfer function of the filter at least partially offsets the transfer function of the output analog circuitry.