A Low Voltage Transmitter and a Portable Nuclear Magnetic Resonance System
Date Issued
2012
Date
2012
Author(s)
Su, Yu-Chi
Abstract
In recent years, the conscious of global people in the integration of medicine and electronic is arising, it makes many researchers in both field of electronic engineering and medical field cooperate frequently. It can be seen from the M2M workshop held by NTU-Intel, NTU medical electronics workshop and the course in NTU called Clinical Application of Medical Electronic Device which is a novel course in Taiwan. Therefore, following this trend, this paper will focus on biomedical electronic system and present two different applications ─ "Integrated low-voltage transmitter" and "Portable NMR transceiver."
This Integrated low-voltage transmitter is implemented in TSMC CMOS Standard 0.18um process, and the transmitter contains the following circuit blocks ─ a voltage control oscillator, a pre-amplifier, a power amplifier and a matching network. Signal from voltage control oscillator will be amplified to certain amplitude and then will be transmitted to the antenna by the power amplifier. Under well-designed matching network and PPM/OOK modulation of whole system, the performance of this work is good.
The main purpose of portable NMR system transceiver is to analyze the hydrogen atoms. Therefore, it is good for the places with rich water, such as perspective cocoon, testing the water content of fruits and vegetables, as well as parents and baby interactive applications and such as home self-testing. It has the feature of portability, low cost and ease to use. Thus, people can use this system for home health care to improve the national health quality of life in the future. The system architecture is divided into the receiver, transmitter, timing controller and 0.5T magnet.
Subjects
CMOS
MICS band
OOK transmitter
NMR
Type
thesis
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