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Signal processing circuit and electronic equipment

A signal processing circuit and signal technology, applied in the low-frequency analog field, can solve problems such as high cost, large common-mode noise in the circuit, and poor conversion effect, and achieve fast response speed, small influence of circuit impedance, and good output effect

Pending Publication Date: 2022-04-15
RUIJIE NETWORKS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In existing schemes, when building signal circuits for processing sensor output, dedicated chips are often used, which is costly; Larger common mode noise, etc., poor conversion effect

Method used

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  • Signal processing circuit and electronic equipment
  • Signal processing circuit and electronic equipment
  • Signal processing circuit and electronic equipment

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Embodiment Construction

[0046] At present, in the process of realizing the intelligent function of the equipment, because the natural environment such as light, electricity, temperature, pressure, etc. cannot be directly processed by the computer, sensors (such as pressure sensors, photoelectric sensors, temperature sensors, etc.) are often used for this purpose. ) to detect information in nature such as light, electricity, temperature, pressure, etc. Generally, the sensor converts the detected light, electricity, pressure and other information into a charge signal output, but the charge signal output by the sensor is a weak signal, so the weak charge signal needs to be amplified and converted into an analog voltage signal (subsequent averaging After the voltage signal is referred to as the voltage signal), the voltage signal is then processed by filtering, analog-to-digital conversion, etc., so as to finally output a square wave signal for subsequent processing by the working module.

[0047] When u...

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Abstract

The embodiment of the invention provides a signal processing circuit and electronic equipment. The signal processing circuit comprises a charge amplifying circuit, a signal processing circuit and a signal processing circuit, amplifying and converting the differential charge signal, and outputting a first voltage signal; the in-phase amplification circuit is connected with the charge amplification circuit and is used for receiving the first voltage signal; amplifying the first voltage signal, and outputting a second voltage signal; the voltage-controlled filter circuit is connected with the in-phase amplification circuit and is used for receiving the second voltage signal, amplifying and filtering the second voltage signal and outputting a third voltage signal; and the hysteresis comparison circuit is connected with the voltage-controlled filter circuit and is used for receiving the third voltage signal and carrying out comparison processing on the third voltage signal to obtain a stable square wave signal. By adopting the scheme provided by the embodiment of the invention, common-mode noise signals can be well suppressed, the response speed is high, the influence of circuit impedance is small, and the square wave signal output effect is good.

Description

technical field [0001] The present application relates to the field of low-frequency analog technology, in particular to a signal processing circuit and electronic equipment. Background technique [0002] With the development of intelligent technology, various smart devices have been popularized. The realization of the intelligent function of the equipment mainly relies on various sensors to detect signals in nature such as light, electricity, pressure, temperature and so on, so as to convert these signals into digital signals (or square wave signals) that can be processed by computers. . [0003] In existing schemes, when building signal circuits for processing sensor output, dedicated chips are often used, which is costly; Larger common mode noise, etc., the conversion effect is not good. Contents of the invention [0004] In view of the above problems, the present application provides a signal processing circuit and an electronic device that solve the above problems ...

Claims

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Application Information

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IPC IPC(8): H03M1/12H03H11/46H03F3/70
Inventor 朱建林
Owner RUIJIE NETWORKS CO LTD
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