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  4. A CMOS analog front-end circuit for micro-fluxgate sensors
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A CMOS analog front-end circuit for micro-fluxgate sensors

Full metadata

Description

Fluxgate sensors are magnetic field sensors that can measure DC and low frequency AC magnetic fields. They can measure much lower magnetic fields than other magnetic sensors like Hall effect sensors, magnetoresistive sensors etc. They also have high linearity, high sensitivity and low noise. The major application of fluxgate sensors is in magnetometers for the measurement of earth's magnetic field. Magnetometers are used in navigation systems and electronic compasses. Fluxgate sensors can also be used to measure high DC currents. Integrated micro-fluxgate sensors have been developed in recent years. These sensors have much lower power consumption and area compared to their PCB counterparts. The output voltage of micro-fluxgate sensors is very low which makes the analog front end more complex and results in an increase in power consumption of the system. In this thesis a new analog front-end circuit for micro-fluxgate sensors is developed. This analog front-end circuit uses charge pump based excitation circuit and phase delay based read-out chain. With these two features the power consumption of analog front-end is reduced. The output is digital and it is immune to amplitude noise at the output of the sensor. Digital output is produced without using an ADC. A SPICE model of micro-fluxgate sensor is used to verify the operation of the analog front-end and the simulation results show very good linearity.

Date Created
2013
Contributors
  • Pappu, Karthik (Author)
  • Bakkaloglu, Bertan (Thesis advisor)
  • Christen, Jennifer Blain (Committee member)
  • Yu, Hongbin (Committee member)
  • Arizona State University (Publisher)
Topical Subject
  • Electrical Engineering
  • Analog integrated circuits
  • Fluxgate magnetometers
  • Magnetic fields--Measurement.
Resource Type
Text
Genre
Masters Thesis
Academic theses
Extent
vii, 51 p. : ill. (some col.)
Language
eng
Copyright Statement
In Copyright
Reuse Permissions
All Rights Reserved
Primary Member of
ASU Electronic Theses and Dissertations
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.18818
Statement of Responsibility
by Karthik Pappu
Description Source
Viewed on Feb. 25, 2014
Level of coding
full
Note
Partial requirement for: M.S., Arizona State University, 2013
Note type
thesis
Includes bibliographical references (p. 49-51)
Note type
bibliography
Field of study: Electrical engineering
System Created
  • 2013-10-08 04:25:35
System Modified
  • 2021-08-30 01:37:59
  •     
  • 1 year 5 months ago
Additional Formats
  • OAI Dublin Core
  • MODS XML

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