David Kenneth Tyson

US Patent:

6480131, Nov 12, 2002

Filed:

Aug 10, 2000

Appl. No.:

09/636152

Inventors:

Weston R. Roper - St. Louis Park MN
David G. Tyson - Eden Prairie MN
Brian L. Westfield - Victoria MN
Michael J. Gaboury - Burnsville MN

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

H03M 112

US Classification:

341155, 341118, 341119, 341156

Abstract:

A two-wire industrial process control transmitter includes a sensor, at least two integrated circuits, and a level shift circuit. The first integrated circuit contains the analog measurement circuit that includes a sensor detection circuit and the analog portion of a digital-to-analog convertor. The second integrated circuit contains the digital system circuit that includes a modem and the digital portion of the analog-to-digital convertor. The first and second ICs may be powered at different voltage levels to maximize the power of the analog circuit and improve resolution. Alternatively, the ICs may be powered at the same voltage level, but the digital circuits are divided among several stacked dies to minimize the voltage for each digital circuit. In either case, the level shifting circuit shifts the voltage level between the analog and digital circuits.

US Patent:

6593857, Jul 15, 2003

Filed:

Jul 31, 2000

Appl. No.:

09/638181

Inventors:

Weston Roper - St. Louis Park MN
Todd M. Berge - Eden Prairie MN
David G. Tyson - Eden Prairie MN
Brian L. Westfield - Victoria MN
Richard L. Nelson - Chanhassen MN

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

G08C 1900

US Classification:

3408703, 3408704, 361679, 361728, 73756

Abstract:

A modular process transmitter having a scalable EMI/RFI filtering architecture includes a unitized sensor module and a transmitter module. The unitized sensor module is adapted to operate as a stand-alone process transmitter. The transmitter module can couple to the unitized sensor module to expand the capabilities of the unitized sensor module. The unitized sensor module includes a sensor housing, a sensor circuit and a removable sensor EMI/RFI filtering circuit. The sensor circuit provides a sensor output in accordance with either a local format or a first communication protocol. The sensor EMI/RFI filtering circuit filters noise in accordance with the first communication protocol. The transmitter module includes a transmitter module housing, a communications circuit, and a transmitter module EMI/RFI filtering circuit. The communications circuit is adapted to receive the sensor output from the sensor circuit in the local format and generate a scalable output in accordance with a second communication protocol. The transmitter module EMI/RFI filtering circuit is adapted to replace the sensor EMI/RFI filtering circuit and filter noise in accordance with the second communication protocol.

US Patent:

6813318, Nov 2, 2004

Filed:

Apr 30, 1999

Appl. No.:

09/303050

Inventors:

Brian L. Westfield - Victoria MN
Weston T. Roper - Chanhassen MN
David G. Tyson - Eden Prairie MN

Assignee:

Rosemount Inc, - Eden Prairie MN

International Classification:

H04L 2720

US Classification:

375295, 34087021

Abstract:

A process transmitter suitable for coupling to a process loop. The process transmitter includes a power regulator adapted to receive a power signal on the process loop and to provide a first signal having a first voltage. Digital components of the process transmitter are electrically coupled to the power regulator to receive power from the first signal. A step-up converter is electrically coupled to the power regulator and receives the first signal. The step-up converter outputs a second signal having a second voltage larger than the first voltage. Analog components of the process transmitter are electrically coupled to the step-up converter to receive power from the second signal.

US Patent:

8234927, Aug 7, 2012

Filed:

Jun 8, 2010

Appl. No.:

12/796023

Inventors:

John P. Schulte - Eden Prairie MN, US
David G. Tyson - Eden Prairie MN, US
Andrew J. Klosinski - Waconia MN, US

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

G01L 9/12

US Classification:

73718, 73724

Abstract:

A pressure sensor assembly for sensing a pressure of a process fluid includes a sensor body having a cavity formed therein and first and second openings to the cavity configured to apply first and second pressures. A diaphragm in the cavity separates the first opening from the second opening and is configured to deflect in response to a differential pressure between the first pressure and the second pressure. A capacitance based deformation sensor is provided and configured to sense deformation of the sensor body in response to a line pressure applied to the sensor body.

US Patent:

20160091380, Mar 31, 2016

Filed:

Sep 30, 2014

Appl. No.:

14/501617

Inventors:

- Chanhassen MN, US
David Glen Tyson - Eden Prairie MN, US

International Classification:

G01L 9/12

Abstract:

A pressure sensing system includes a hot zone electronics module, a cool zone electronics module and a plurality of conductors that connect the hot zone electronics to the cool zone electronics. The hot zone electronics module includes a capacitive pressure sensor and an oscillator that provides an oscillating signal to the capacitive pressure sensor. The hot zone electronics provides at least one DC sensor signal. The cool zone electronics module converts the at least one DC sensor signal into a pressure value and provides a DC power signal. The plurality of conductors convey the DC power signal to the hot zone electronics and convey the at least one DC sensor signal to the cool zone electronics.

US Patent:

20150003560, Jan 1, 2015

Filed:

Jun 28, 2013

Appl. No.:

13/930165

Inventors:

- Chanhassen MN, US
David G. Tyson - Eden Prairie MN, US
John P. Schulte - Eden Prairie MN, US
Eugene Korolev - Maple Grove MN, US

Assignee:

ROSEMOUNT INC. - Chanhassen MN

International Classification:

H04L 25/08
H04L 25/06
H04L 7/00

US Classification:

375296

Abstract:

In a process variable transmitter, a sensor signal is sampled, using a clock signal, at a sensor sampling frequency. Interference is also sampled at the sensor sampling frequency. A comparison is made to determine whether the interference at the sensor sampling frequency or harmonics of the sensor sampling frequency exceed a threshold level. If so, the clock signal is changed to adjust the sensor sampling frequency away from the frequency of the interference.