Weak pulse signal amplification circuit and tiny dust detector

A pulse signal and amplifying circuit technology, applied in differential amplifiers, DC-coupled DC amplifiers, improved amplifiers to improve efficiency, etc., can solve problems such as signal interference, and achieve the effects of ensuring reliability, improving accuracy, and reducing noise

Active Publication Date: 2020-10-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the input capacitance in the existing weak pulse signal discharge circuit has signal interference between the shock sensor and the charge sensitive amplifier sub-circuit, and provides a weak pulse signal amplifier circuit and a dust detector

Method used

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  • Weak pulse signal amplification circuit and tiny dust detector
  • Weak pulse signal amplification circuit and tiny dust detector
  • Weak pulse signal amplification circuit and tiny dust detector

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Embodiment Construction

[0052] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0053] see figure 2 , shows a weak pulse signal amplifying circuit according to an embodiment of the present invention, including an input capacitor 1, an impact sensor 2 and a charge-sensitive amplifier sub-circuit 3, one end of the input capacitor 1 and one end of the impact sensor 2 are directly connected to the charge-sensitive amplifier The input end of the circuit 3 is electrically connected, and the other end of the shock sensor 2 is grounded, which prevents the shock sensor 2 from being coupled with the charge sensitive amplifier sub-circuit 3 through the input capacitor 1 and prevents the input capacitor 1 from following the shock sensor 2 to work.

[0054] The input capacitor 1 is used to maintain the first idle state when the i...

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Abstract

The invention relates to the technical field of amplifying circuits. The invention provides a weak pulse signal amplification circuit and a tiny dust detector. The circuit comprises an input capacitor, an impact sensor and a charge sensitive amplification sub-circuit. The input capacitor and the impact sensor are electrically connected with the input end of the charge sensitive amplification sub-circuit; the input capacitor and the impact sensor are directly coupled with the input end of the charge sensitive amplification sub-circuit; when the impact sensor is in a detection state, the input capacitor has the performance of preventing a weak charge pulse signal from being output to the charge sensitive amplification sub-circuit, the impact sensor is prevented from being coupled with the charge sensitive amplification sub-circuit through the input capacitor, the input capacitor is prevented from working along with the impact sensor, and the defect that the input capacitor in an existingweak pulse signal discharge circuit causes signal interference between the impact sensor and the charge sensitive amplification sub-circuit is overcome.

Description

technical field [0001] The invention relates to the technical field of amplifying circuits, in particular to a weak pulse signal amplifying circuit and a dust detector. Background technique [0002] Existing dust detectors usually include a weak pulse signal discharge circuit, see figure 1 , shows a weak pulse signal discharge circuit, including an input capacitor 1', a shock sensor 2' and a charge-sensitive amplifier sub-circuit 3', and the shock sensor 2' is coupled with the charge-sensitive amplifier sub-circuit 3' through an input capacitor 1', The impact sensor 2' is impacted by micron-sized solid particles at high speed (for a brief description, the micron-sized solid particles are called dust), generates a weak charge pulse signal, and outputs the weak charge pulse signal to the input capacitor 1' (for a brief description, The weak charge pulse signal output from the impact sensor 2' is called the first charge signal), and after the input capacitor 1' blocks the firs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F3/45G01L1/16G01L5/00G01V9/00
CPCG01L1/16G01L5/0052G01V9/00H03F1/02H03F3/45
Inventor 李兴冀杨剑群董尚利吕钢
Owner HARBIN INST OF TECH
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