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Bridge sensor biasing and readout system

A technology of bridge sensors and sensors, which is applied in the field of sensor systems and can solve problems such as current consumption

Pending Publication Date: 2022-05-10
メレクシステクノロジーズソシエテアノニム
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For small ICs, this is a significant current drain

Method used

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  • Bridge sensor biasing and readout system
  • Bridge sensor biasing and readout system
  • Bridge sensor biasing and readout system

Examples

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Embodiment Construction

[0050] The present invention will be described with respect to particular embodiments and with reference to certain drawings but the invention is not limited thereto but only by the claims. The drawings described are only schematic and non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. Dimensions and relative dimensions do not correspond to actual reductions to implementations of the invention.

[0051] The terms first, second, etc. in the description and claims are used to distinguish between similar elements and not necessarily to describe an order in time, space, hierarchy or in any other way. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.

[0052] Furthermore, the terms top, below, etc. in the descript...

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Abstract

The invention discloses a bridge sensor biasing and readout system. A sensor system (100) for measuring a physical quantity. The sensor system (100) comprises: a bridge sensor (110), the bridge sensor (110) comprising at least two terminal pairs; a current source (150) for applying a bias current between the pair of bias terminals, generating a differential sensor signal on the pair of readout terminals (113, 114), where the differential sensor signal is indicative of a physical quantity; and an amplifier (120) comprising a first input node (121) and a second input node (122) for receiving a differential signal, and at least one output node (123, 124), where the amplifier (120) is configured for amplifying the differential sensor signal and placing the resulting signal on the at least one output node (123, 124), where the sensor system (100) is configured such that, in operation, the first input node (121) and the second input node (122) are coupled to the first input node (121) and the second input node (122). The amplifier (120) is powered by at least a portion of the bias current.

Description

technical field [0001] The invention relates to sensor systems. More specifically, the present invention relates to a sensor system using a bridge sensor for measuring a physical quantity and configured for biasing and reading out the bridge sensor. Background technique [0002] Bridge sensors typically include at least two pairs of terminals. A physical quantity is measured by applying a current between one pair of terminals and measuring the resulting signal between another pair of terminals. The resulting signal is a measure of the physical quantity. [0003] figure 1 An example of a sensor system comprising a bridge sensor is schematically shown. Such bridge sensors are biased by applying a voltage or current to two excitation nodes (a pair of terminals) of the sensor 110 . In this example, current is applied using current source 150 . The bridge sensor may be a Hall plate 110 . The Hall plate output voltage (or sometimes the output current) is obtained from the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/14
CPCG01D5/142G01R33/0041G01R33/07G01R33/075G01R33/0023G01R33/09G01D5/16G01R15/202G01R33/091G01R33/098H03F3/45076
Inventor J·拉曼P·龙包茨
Owner メレクシステクノロジーズソシエテアノニム