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Signal processing circuit and method

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

Active Publication Date: 2016-04-13
HANGZHOU SILAN MICROELECTRONICS
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  • Abstract
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  • 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 circuit and method
  • Signal processing circuit and method
  • Signal processing circuit and method

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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 s...

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Abstract

Disclosed is a signal processing circuit and method. The signal processing circuit includes a signal source for providing a source signal, an amplifier connected with the signal source and amplifying the source signal, a zeroing circuit connected with the amplifier and compensating the amplified signal, an analog-to-digital converter connected with the zeroing circuit and converting the compensated signal to the digital signal, and a digital signal processor connected with the analog-to-digital converter and performing operation processing on the digital signal. The zeroing circuit includes a resistor connected with the output end of the amplifier, the compensation voltage is superposed on the output signal of the amplifier via the resistor, so that the zero drift of the signal source and the amplifier can be suppressed. The signal processing circuit suppresses the zero shift of a plurality of circuit modules by means of the zeroing circuit 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 or / and the signal processing circuit may reduce the detection sensitivity and accuracy of the sensor. 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 or / and 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 reduce or ...

Claims

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Application Information

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Patent Type & Authority Applications(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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