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Sensing circuit and method for controlling the sensing circuit

A sensing circuit and voltage sensing technology, applied in control/regulating systems, regulating electrical variables, instruments, etc., can solve the problems of output signal interference and easy distortion of measurement results.

Inactive Publication Date: 2018-04-06
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current voltage and current changes that piezoelectric materials can produce are very weak, so their output signals are easily disturbed by noise in the environment or back-end circuits, making the measurement results easily distorted

Method used

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  • Sensing circuit and method for controlling the sensing circuit
  • Sensing circuit and method for controlling the sensing circuit
  • Sensing circuit and method for controlling the sensing circuit

Examples

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Embodiment Construction

[0038] The following examples are described in detail in conjunction with the accompanying drawings to better understand the content of the present invention, but the provided examples are not intended to limit the scope of the present invention, and the description of the structure and operation is not intended to The execution sequence is limited, and any device with equivalent functions produced by recombining components is within the scope of the present invention. In addition, according to industry standards and common practice, the drawings are only for the purpose of assisting explanation, and are not drawn according to the original scale. In fact, the dimensions of various features can be arbitrarily increased or decreased for the convenience of illustration. In the following description, the same components will be described with the same symbols for easy understanding.

[0039] The terms (terms) used throughout the specification and patent claims generally have the o...

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PUM

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Abstract

The invention discloses a sensing circuit comprising a sensing module and a reading module. The sensing module is used to receive sensing voltage, and is used to output output current correspondingly. The sensing module comprises a sensing transistor and a current mirror unit. The first end of the sensing transistor is used to receive reference voltage. The sensing transistor is used to output reference current according to the reference voltage and the sensing voltage. The current mirror unit is electrically coupled with the sensing transistor, and is used to output the output current in a mapped manner according to the reference current. The reading module and the sensing module are electrically coupled with one node, and are used to output an output voltage signal according to the output current. The voltage level of the node is approximately equal to the reference voltage.

Description

technical field [0001] The disclosure relates to a sensing circuit, and in particular to a circuit structure and a control method using the sensing circuit. Background technique [0002] Recently, piezoelectric thin film sensors made of piezoelectric materials are widely used in applications related to pressure measurement such as pulse measurement or other physiological signal measurement. [0003] However, the current voltage and current changes that piezoelectric materials can produce are very weak, so their output signals are easily disturbed by noise in the environment or back-end circuits, making the measurement results easily distorted. Contents of the invention [0004] One aspect of the present disclosure is a sensing circuit. The sensing circuit includes a sensing module and a reading module. The sensing module is used for receiving the sensing voltage and correspondingly outputting the output current. The sensing module includes a sensing transistor and a cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 卢文哲刘育荣黄明益詹仁宏
Owner AU OPTRONICS CORP