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Method and system for docking lc sensor

A sensor and capacitor technology, applied in the field of docking LC sensors, can solve the problems of great voltage change, large cost, large energy consumption, etc.

Active Publication Date: 2018-03-09
STMICROELECTRONICS SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Therefore, the first problem concerns the use of dedicated low-energy analog components, such as for generating the voltage V MID and the internal reference voltage V Ref , which leads to a large cost
The second problem concerns the DAC 210, which is going to be low power and fast enough to follow the ringing
This results in extremely high energy consumption per measurement and challenges application limitations in battery powered systems
[0014] In addition, process-voltage-temperature (PVT) variation is another important issue in battery-powered systems where there are extreme voltage changes

Method used

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  • Method and system for docking lc sensor
  • Method and system for docking lc sensor
  • Method and system for docking lc sensor

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Embodiment Construction

[0035] In the following description, numerous specific details are given in order to provide a thorough understanding of the embodiments. Embodiments may be practiced without one or several of the specific details, or with other methods, components, materials, etc. In other instances, widely known structures, materials, or operations are not shown or described in detail to avoid obscuring characteristic aspects of the embodiments.

[0036] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0...

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PUM

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Abstract

A method for interfacing an LC sensor with a control unit is described. The control unit may comprise first and second contacts, and the LC sensor may be connected between the first and second contacts. The method may include initiating oscillation of the LC sensor, and monitoring a voltage at the second contact, wherein the voltage at the second contact corresponds to a sum of the voltage at the first contact and the voltage at the LC sensor. The voltage at the first contact may vary such that the voltage at the second contact does not exceed the upper voltage threshold and does not drop below the lower voltage threshold.

Description

technical field [0001] Embodiments of the present disclosure relate to techniques for docking LC sensors. Background technique [0002] LC sensors are widely known in the art. For example, LC sensors can be used as electronic proximity sensors capable of detecting the presence of conductive objects. Some common applications of inductive sensors include, for example, metal detectors and derived applications such as rotation sensors. [0003] figure 1 The basic structure of an LC sensor 10 according to the prior art is shown. In the example considered, the LC sensor 10 comprises an inductor L and a capacitor C, which form a resonant circuit also called a tank circuit. The arrangement further comprises a power source 102 such as a voltage source and a switch 104 . When the switch 102 is in the first position (such as figure 1 shown in ), capacitor C charges to the supply voltage. When capacitor C is fully charged, switch 102 changes position, placing capacitor 102 in par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/00G05B19/04
CPCG01D3/032G01R15/16G01R15/18
Inventor R·孔多雷利D·曼加诺
Owner STMICROELECTRONICS SRL