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

Accelerometer front-end circuit and acceleration signal processing method

A front-end circuit, accelerometer technology, used in the measurement of acceleration, speed/acceleration/shock measurement, electrical components, etc., can solve the problem of low signal-to-noise ratio, high power consumption, no removal of low-frequency 1/f noise and input bias voltage shift etc.

Active Publication Date: 2021-04-13
CSMC TECH FAB2 CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The analog front end of the traditional accelerometer does not remove the low-frequency 1 / f noise and the input offset voltage (offset), so that the signal-to-noise ratio of the output signal is not high
In addition, in a continuous system, since the sensor and the control circuit are always in a continuous working state, the power consumption is large

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
  • Accelerometer front-end circuit and acceleration signal processing method
  • Accelerometer front-end circuit and acceleration signal processing method
  • Accelerometer front-end circuit and acceleration signal processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] figure 2 It is a block diagram of the front-end circuit of the accelerometer of an embodiment. The front-end circuit 10 is used to connect the acceleration sensor 20 to obtain the original analog signal, and perform front-end processing on the original analog signal. The front-end circuit 10 includes an amplifier circuit 100 and a low-pass filter circuit 200 . The amplification circuit 100 is used to connect with the acceleration sensor 20, receive the original analog signal, and amplify the original analog signal. The low-pass filter circuit 200 is connected to the amplifying circuit 10...

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 relates to a front-end circuit of an accelerometer and an acceleration signal processing method. The front-end circuit is used to connect the acceleration sensor to obtain the original analog signal, and perform front-end processing on the original analog signal, including: an amplification circuit, used to connect with the acceleration sensor, receive the original analog signal, and convert the original analog signal The signal is amplified; the low-pass filter circuit is connected with the amplifying circuit, and is used to perform low-pass filtering processing on the amplified signal to eliminate noise; wherein, the amplifying circuit includes: a first chopping circuit, used for processing with the acceleration The sensor is connected to receive the original analog signal and perform the first chopping process on the original analog signal; the operational amplifier circuit is connected to the first chopping circuit to amplify the output signal of the first chopping circuit; the second The second chopping circuit is connected with the operational amplifier circuit, and performs the second chopping process on the amplified signal. The noise in the front-end circuit is small.

Description

technical field [0001] The invention relates to the technical field of acceleration sensors, in particular to a front-end circuit of an accelerometer and an acceleration signal processing method. Background technique [0002] MEMS accelerometers are accelerometers manufactured using MEMS technology. Due to the use of micro-mechanical technology, it has the advantages of small size, light weight and low power consumption. Widely used in vibration detection, orientation detection, consumer applications, motion recognition and other fields. [0003] Piezoresistive accelerometers are made using the piezoelectric effect of PZT (lead zirconate titanate) ceramics. When PZT ceramic is stressed, its resistance value changes. By connecting the piezoresistor bridge, the change of resistance value is converted into the change of voltage. It detects, amplifies and corrects through a special ASIC, and then outputs a binary digital signal corresponding to the acceleration value. [00...

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 Patents(China)
IPC IPC(8): G01P15/00H03F3/45H03H11/38
CPCG01P15/00H03F3/45197H03H11/38
Inventor 王雪艳
Owner CSMC TECH FAB2 CO LTD
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