Signal processing circuits and methods

A signal processing circuit and signal technology, applied in the field of sensors, can solve problems such as source signal error, achieve the effect of eliminating zero point drift, simplifying design complexity and accuracy requirements

Active Publication Date: 2019-02-12
HANGZHOU SILAN MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The zero drift of the amplifier 130 itself will still cause errors in the amplified source signal

Method used

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  • Signal processing circuits and methods
  • Signal processing circuits and methods
  • Signal processing circuits and methods

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Embodiment Construction

[0042] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown.

[0043] In the following, many specific details of the present invention are described, such as device structures, materials, dimensions, processing techniques and techniques, for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.

[0044] The invention can be embodied in various forms, some examples of which are described below.

[0045] figure 2 A schematic circuit diagram showing a signal processing circuit according to a first embodiment of the present invention. The signal processing circuit includes a signal sou...

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Abstract

The invention discloses a signal processing circuit and method. The circuit comprises a signal source which is used for providing a source signal; an amplifier which is connected with the signal source and amplifies the source signal; a zero-setting circuit which is connected with the amplifier and is used for compensating the amplified signal; an analog-digital converter which is connected with the amplifier and the zero-setting circuit, and converts the compensated circuit into a digital signal; and a digital signal processor which is connected with the analog-digital converter and is used for carrying out the operation processing of the digital signal. The zero-setting circuit is connected to the output end of the amplifier, and the output end of the amplifier provides a compensation current, thereby inhibiting the zero drift of the signal source and the zero drift of the amplifier. The signal processing circuit inhibits the zero drift of a plurality of circuit modules through the zero-setting circuit which is connected with the output end of the amplifier.

Description

technical field [0001] The present invention relates to sensor technology, and more particularly, to signal processing circuits and methods. Background technique [0002] The performance of the signal processing circuit itself has an important influence on the detection ability of the sensor. The zero point drift of the sensor and / or signal processing circuit may cause the detection sensitivity and accuracy of the sensor to decrease. Zero drift means that when the input signal of the sensor is zero, the output signal deviates from the fixed value and drifts. Zero drift may be caused by various reasons, such as the manufacturing process of sensors and / or integrated circuits, the properties of the circuit structure itself, power supply voltage fluctuations, temperature changes, etc. [0003] Existing measures for suppressing zero-point drift in signal processing circuits include using aged components, improving power supply stability, and using zero-adjusting circuits to red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0425G05B2219/2612
Inventor 葛康康周小爽胡铁刚李石亮
Owner HANGZHOU SILAN MICROELECTRONICS
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