Invention Grant
US08982989B2 Process variable transmitter with variable frequency clock circuit for rejection of clock synchronous noise
有权
具有可变频时钟电路的过程变量变送器，用于抑制时钟同步噪声
- Patent Title: Process variable transmitter with variable frequency clock circuit for rejection of clock synchronous noise
- Patent Title (中): 具有可变频时钟电路的过程变量变送器，用于抑制时钟同步噪声
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Application No.: US13930165Application Date: 2013-06-28
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Publication No.: US08982989B2Publication Date: 2015-03-17
- Inventor: Peter J. Flanagan , David G. Tyson , John P. Schulte , Eugene Korolev
- Applicant: Rosemount Inc.
- Applicant Address: US MN Chanhassen
- Assignee: Rosemount Inc.
- Current Assignee: Rosemount Inc.
- Current Assignee Address: US MN Chanhassen
- Agency: Westman, Champlin & Koehler, P.A.
- Main IPC: H04L27/00
- IPC: H04L27/00 ; H04L25/08 ; H04L7/00 ; H04L25/06
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.
Public/Granted literature
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