Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Detector fully differential circuit based on charge amplification

A technology of charge amplification circuit and voltage amplification circuit, which is applied in the field of detector full differential circuit, can solve the problems of cable resistance and distributed capacitance loss, interference, noise and zero drift aggravation, so as to resist noise interference and improve low frequency reception capability, the effect of high common-mode rejection ratio

Inactive Publication Date: 2019-10-11
西安陆海地球物理科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But too high input impedance will increase noise and zero drift
Secondly, the direct connection cable between the circuit and the shock unit (movement) with the piezoelectric crystal as the main body should not be too long, otherwise the cable resistance and distributed capacitance will cause greater loss and greater interference
Only these two points have brought certain restrictions on the performance improvement of piezoelectric detectors using voltage extraction and amplification.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detector fully differential circuit based on charge amplification
  • Detector fully differential circuit based on charge amplification
  • Detector fully differential circuit based on charge amplification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] according to Figure 1-7The shown a kind of detector full differential circuit based on charge amplification includes at least core unit 1 and subsequent filtering and acquisition circuit 4, and also includes a charge amplification circuit; The output positive pole is connected, the input negative pole of the charge amplification circuit is connected with the output negative pole of the core unit 1; the output positive pole of the charge amplification circuit is connected with the input positive pole of the follow-up filtering and acquisition circuit 4, and the output negative pole of the charge amplification circuit is connected with the follow-up filtering and the negative input of the acquisition circuit 4 are connected.

[0031] Preferably, the charge amplification circuit is composed of a charge conversion circuit 2 and a voltage amplification circuit 3; the input positive pole of the charge conversion circuit 2 is connected with the output positive pole of the cor...

Embodiment 2

[0034] according to figure 1 , Figure 5 with Image 6 The difference between the fully differential detector circuit based on charge amplification and the first embodiment is that the charge conversion circuit 2 is composed of a first operational amplifier A1, a second operational amplifier A2, a first feedback capacitor C1, Composed of the second feedback capacitor C2, the first feedback resistor R1, the second feedback resistor R2, the first grounding resistor R3 and the second grounding resistor R4; the inverting input terminals of the first operational amplifier A1 and the second operational amplifier A2 Connected to the output of the core unit 1; one end of the first feedback capacitor C1 connected in parallel with the first feedback resistor R1 is connected to the inverting input terminal of the first operational amplifier A1, and the first feedback capacitor C1 is connected in parallel with the first feedback resistor R1 The other end is connected to the inverting ou...

Embodiment 3

[0045] according to figure 1 with Figure 7 The difference between the fully differential detector circuit based on charge amplification and the second embodiment is that the charge conversion circuit 2 is composed of a first operational amplifier A1, a second operational amplifier A2, a first feedback capacitor C1, Composed of the second feedback capacitor C2, the first feedback resistor R1, the second feedback resistor R2, the first grounding resistor R3 and the second grounding resistor R4; the inverting input terminals of the first operational amplifier A1 and the second operational amplifier A2 Connected to the output of the core unit 1; one end of the first feedback capacitor C1 connected in parallel with the first feedback resistor R1 is connected to the inverting input terminal of the first operational amplifier A1, and the first feedback capacitor C1 is connected in parallel with the first feedback resistor R1 The other end of the second feedback capacitor C2 is conn...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of seismic exploration, and particularly relates to a detector fully differential circuit based on charge amplification. The detector fully differential circuit comprises a charge amplification circuit consisting of a charge conversion circuit and a voltage amplification circuit, a movement unit, and a subsequent filtering and collecting circuit. The detector fully differential circuit can improve low frequency acceptance capability effectively without high input impedance, and can provide high common mode rejection ratio to resist noise interference regardless of the length of a transmission wire. The length of the transmission wire does not affect attenuation of voltage amplitude of the transmission signal, and distributed capacitance does notaffect a piezoelectric detector circuit of the frequency band width.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration, in particular to a fully differential circuit for a detector based on charge amplification. Background technique [0002] In the seismic exploration system, the geophone undertakes the task of converting the received formation shock wave into an electrical signal output, the seismic wave generated from the source, propagates deep into the formation, and transmits the reflected wave with formation information to the vertical ground insertion The geophone receives. Due to the limitation of the source strength and the attenuation of the formation medium, the geophone needs to receive the weak seismic wave signal from the deep formation. To fully and accurately reflect formation information, the detector must have sufficient sensitivity and sufficient bandwidth to accept, and have the ability to resist external interference. [0003] The geophone completes the electromechanical conversio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/18
CPCG01V1/181
Inventor 田骏
Owner 西安陆海地球物理科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com