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Switched resistor sensor bridge, corresponding system and method

A technology of resistors and resistors, which is applied in the direction of using electric/magnetic devices to transmit sensing components, measuring the force of properties of piezoelectric resistance materials, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve problems that cannot be solved. Easy, non-linear, high current consumption of the Wheatstone bridge, etc., to achieve the effect of enhanced accuracy, good linearity, and easy implementation

Active Publication Date: 2020-11-13
STMICROELECTRONICS SRL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can introduce noise, non-linearity and increase overall power consumption
[0007] Furthermore, the current consumption of a Wheatstone bridge can be high (e.g., on the order of mA or higher) and cannot be easily reduced by designing a highly resistive sensor because the resistance of a resistive sensor depends on the sensor's Physical characteristics and the physical environment in which it will be measured

Method used

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  • Switched resistor sensor bridge, corresponding system and method
  • Switched resistor sensor bridge, corresponding system and method
  • Switched resistor sensor bridge, corresponding system and method

Examples

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Embodiment Construction

[0044] In the ensuing description, one or more specific details are illustrated in order to provide an in-depth understanding of examples of the described embodiments. Embodiments may be obtained with one or more of these specific details or with other methods, components, materials, and the like. In other instances, known structures, materials, or operations are not shown or described in detail so as not to obscure aspects of the embodiments.

[0045] References to "one embodiment" or "one embodiment" in the context of the present description are intended to indicate that a particular configuration, structure, characteristic described with respect to the embodiment is followed in at least one embodiment. Thus, phrases such as "in one embodiment" or "in one (or more) embodiments" that may be present at one or more points in this description do not necessarily refer to one and the same embodiment . Furthermore, particular configurations, structures or characteristics illustra...

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Abstract

A sensor comprises one or more resistive sensing bridges comprising a first sensing branch (SR1) having a first sensing resistor (R1) and a second sensing branch (SR2) having a second sensing resistor(R2); an oscillator (100) configured to generate an oscillation signal (Vosc); a sensor reference module (102) configured to generate a control signal (Ictrl) for the oscillator according to resistance values of the resistors (R1, R2) coupled thereto; and processing circuits(202, 204, 206) coupled to the oscillator (100) to provide a sensor signal (Vcount) indicative of a frequency (Fosc) of theoscillating signal (Vosc) or a respective period (Tosc).

Description

[0001] This application is a divisional application of an invention patent application with an application date of November 30, 2016, an application number of 201611084514.5, and an invention title of "Switched Resistor Sensor Bridge, Corresponding System and Method". technical field [0002] This description refers to sensor bridges. [0003] One or more embodiments may be applied, for example, to sensor electronics such as pressure sensors, strain gauges, load cells, temperature sensors, and the like. [0004] One or more embodiments may be applied, for example, to sensor electronics interfaces with reduced size, low supply voltage, and low power consumption, for example, in portable , remote and wireless electronic systems. Background technique [0005] Although signal conditioning techniques for resistive sensors based on Wheatstone bridge (WB) circuits are widely used, the Wheatstone bridge configuration may not facilitate achieving low voltage and low power consumptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/16
CPCG01D5/16G01L9/0052G01K7/16G01L1/18G01L1/2262G01L1/2287
Inventor S·A·斯梅兹
Owner STMICROELECTRONICS SRL
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