Bridge voltage inversion circuit for vacuum gauge and pressure gauge sensor having the voltage inversion circuit

A technology of bridge voltage and inversion circuit, which is applied in fluid pressure measurement using capacitance change, vacuum gauge, fluid pressure measurement through electromagnetic components, etc. It can solve the problems of variable gain module distortion and injected noise, etc.

Pending Publication Date: 2021-12-14
SUMITOMOSHICRYOGENICS OF AMERICA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] In addition to variable gain block distortion that may be introduced along the signal path, there is also the possibility of injecting noise from places such as the power supply and ground before being presented to the ADC

Method used

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  • Bridge voltage inversion circuit for vacuum gauge and pressure gauge sensor having the voltage inversion circuit
  • Bridge voltage inversion circuit for vacuum gauge and pressure gauge sensor having the voltage inversion circuit
  • Bridge voltage inversion circuit for vacuum gauge and pressure gauge sensor having the voltage inversion circuit

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Embodiment Construction

[0030] In this section, some embodiments of the invention will be described more fully with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout, and in alternative embodiments, primes are used to indicate like elements.

[0031] This article describes an implementation of a bridge voltage inversion circuit for a vacuum gauge / sensor. The implementation of the bridge voltage inversion circuit provides the best signal quality in vacuum. As mentioned above, the pressure reading is proportional to the signal amplitude of the bridge voltage; the mismatch between the reference capacit...

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Abstract

The disclosed invention provides a bridge voltage inversion circuit for vacuum gauge and a pressure gauge sensor that includes the bridge voltage inversion circuit. The bridge voltage inversion circuit for a pressure gauge includes a reference capacitance, a sensor capacitance, and a transformer including a primary winding and a secondary winding that outputs a bridge voltage. The reference capacitor is connected to a first side of the secondary winding of the transformer, and the sensor capacitor is connected to a second side of the secondary winding of the transformer. The sensor capacitor senses and responds to a pressure, and a capacitance of the sensor capacitor is at a minimum when the pressure is at vacuum. The capacitance of the sensor capacitor at vacuum is less than a capacitance of the reference capacitor.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 848,326, filed May 15, 2019, entitled "Bridge Voltage Inversion Circuit for a Vacuum Gauge and Method of Operation of the Bridge Voltage Inversion Circuit," which The entire contents are incorporated herein by reference. technical field [0003] The present invention generally relates to vacuum gauges that can be used in current vacuum gauges (for example, WYDE Gauge TM ) sensor analog front-end circuitry found in the analog circuit board of the unit, and more specifically related to enhancing the analog of the WYDE Gauge unit with a smaller circuit bill of materials (BOM) and lower power consumption while achieving better manufacturability performance of the circuit board. The basic concept can also be extended to other types of gauges. Background technique [0004] In current vacuum gauges (eg, WYDE Gauge TM ) in an analog front-end...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14G01L21/00H01F27/28
CPCG01L21/00G01L9/12G01L9/0072G01L1/144H01F27/28G01L9/0051G01L21/12
Inventor 霍华德·H·唐斯科特·迈克尔·哈里斯
Owner SUMITOMOSHICRYOGENICS OF AMERICA
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