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Low-frequency weak signal amplification circuit

An amplifying circuit and signal amplifying technology, applied in the direction of amplifier combination, negative feedback circuit layout, etc., can solve the problems of difficult acquisition of low-frequency weak signals and poor accuracy, and achieve the effect of stable acquisition signal, reasonable and effective application, and adaptability to many occasions.

Inactive Publication Date: 2019-03-29
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose a low-frequency weak small signal amplifying circuit to solve the existing situation that it is difficult to collect low-frequency weak signals and the accuracy is poor

Method used

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  • Low-frequency weak signal amplification circuit
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Embodiment Construction

[0031] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be und...

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Abstract

The invention provides a low-frequency weak signal amplification circuit which comprises more than one signal acquisition channel. Each signal acquisition channel is correspondingly provided with a sensor for acquiring a signal and a signal amplification unit connected with the sensor; signal amplification times of the signal amplification unit of each acquisition channel are all different; data of the signal amplification unit of each signal acquisition channel is summarized and uploaded to an upper computer by a data line; each signal amplification unit comprises a power supply circuit for supplying power, an attenuator and a multi-stage signal amplification circuit; and the signal output end of each sensor is connected with the signal input end of the corresponding attenuator, and the signal output end of the attenuator is connected with the corresponding multi-stage signal amplification circuit. The low-frequency weak signal amplification circuit provided by the invention is stablein signal acquisition and is not limited to environment factors; cost is much smaller than that of imported equipment, and similar equipment is researched a little at home; and the low-frequency weaksignal amplification circuit is suitable for multiple occasions and can be reasonably and effectively applied.

Description

Technical field [0001] The invention belongs to the technical field of signal amplifying circuits, in particular to a low-frequency weak and small signal amplifying circuit. Background technique [0002] Usually the signals encountered in nature are analog signals, which are continuous in both the amplitude domain and the time domain. An analog signal refers to information represented by a continuously changing physical quantity. The amplitude, frequency, or phase of the signal varies with time. Make continuous changes, such as broadcast sound signals, television image signals, etc. [0003] The main advantage of an analog signal is its precise resolution. Under ideal circumstances, it has infinite resolution. Compared with digital signals, analog signals have higher information density. Since there is no quantization error, it can describe the true value of the physical quantity in nature as close as possible. [0004] But the analog signal in life is relatively weak and difficul...

Claims

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Application Information

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IPC IPC(8): H03F1/34H03F3/68
CPCH03F1/34H03F3/68
Inventor 赵光
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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