Low power modulator for capsule endoscope

The evolution of wireless communication and circuit integration has brought medical science and devices to a new dimension. This leads to the invention of wireless capsule endoscope. Conventional endoscope for gastrointestinal diseases diagnoses which are uncomfortable for patients, have certain li...

Full description

Saved in:

Bibliographic Details
Main Author:	Lioe, De Xing
Format:	Thesis
Language:	English
Published:	2013
Subjects:	Wireless communication systems
Online Access:	http://psasir.upm.edu.my/id/eprint/47570/1/FK%202013%2043R.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.47570
record_format	uketd_dc
spelling	my-upm-ir.475702016-07-22T01:18:54Z Low power modulator for capsule endoscope 2013-07 Lioe, De Xing The evolution of wireless communication and circuit integration has brought medical science and devices to a new dimension. This leads to the invention of wireless capsule endoscope. Conventional endoscope for gastrointestinal diseases diagnoses which are uncomfortable for patients, have certain limitations in performing diagnosis or treatment. Thus it is not feasible for the conventional endoscope, in terms of travelling through a long and convoluted small intestine. Wireless capsule endoscopy addresses the disadvantages of the conventional wired endoscopes where it can reach the small intestine and achieve diagnosis without discomforting the patients as well as easily travel through the digestion tract. Being a wireless device, the design of the capsule endoscope transmitter is paramount for the overall performance. Power consumption is the utmost important aspect in the consideration. The selection of the standard or carrier frequency is optimum to ot requirements which are image quality and frame rate. Considering the loss against frequency in a human body wireless communication, Industrial, Scientific, Medical (ISM) band of 434 MHz is employed in the design of the transmitter. This band has lower loss and relatively higher data rate compared to other standards. Inductorless architecture was adopted in the circuit design to reduce the circuit area, thus contribute to the reduction of capsule size. Taking into account on the aspects in concern, the up-conversion mixer, ring oscillator and the integrated modulator is designed using CMOS 0.13 μm technology with voltage supply of 1.2 V. Low power consumption is achieved where the mixer consumes only 594 uA, which is equivalent to 712.8 uW of power consumption. Positive linearity is achieved with Third-Order Intercept Point (IIP3) of 2 dBm, while the dynamic range which is represented by P1dB is -5.43 dBm. Noise figure of the mixer is found to be 23 dB. The ring oscillator consumes 740 μA which translate to 888 μW of power consumption. Phase noise achieved is -81 dBc/Hz at 160 kHz of offset frequency. The integrated modulator achieves power consumption of 1.88 mW,which is superior compared to other reported work. Battery life utilizing the proposed architecture can reach 13.8 hours compared to the average of 8 hours operational time. Die area utilized is merely 0.44 mm2 which allows better integration of other blocks in the capsule endoscope. Wireless communication systems 2013-07 Thesis http://psasir.upm.edu.my/id/eprint/47570/ http://psasir.upm.edu.my/id/eprint/47570/1/FK%202013%2043R.pdf application/pdf en public masters Universiti Putra Malaysia Wireless communication systems
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Wireless communication systems
spellingShingle	Wireless communication systems Lioe, De Xing Low power modulator for capsule endoscope
description	The evolution of wireless communication and circuit integration has brought medical science and devices to a new dimension. This leads to the invention of wireless capsule endoscope. Conventional endoscope for gastrointestinal diseases diagnoses which are uncomfortable for patients, have certain limitations in performing diagnosis or treatment. Thus it is not feasible for the conventional endoscope, in terms of travelling through a long and convoluted small intestine. Wireless capsule endoscopy addresses the disadvantages of the conventional wired endoscopes where it can reach the small intestine and achieve diagnosis without discomforting the patients as well as easily travel through the digestion tract. Being a wireless device, the design of the capsule endoscope transmitter is paramount for the overall performance. Power consumption is the utmost important aspect in the consideration. The selection of the standard or carrier frequency is optimum to ot requirements which are image quality and frame rate. Considering the loss against frequency in a human body wireless communication, Industrial, Scientific, Medical (ISM) band of 434 MHz is employed in the design of the transmitter. This band has lower loss and relatively higher data rate compared to other standards. Inductorless architecture was adopted in the circuit design to reduce the circuit area, thus contribute to the reduction of capsule size. Taking into account on the aspects in concern, the up-conversion mixer, ring oscillator and the integrated modulator is designed using CMOS 0.13 μm technology with voltage supply of 1.2 V. Low power consumption is achieved where the mixer consumes only 594 uA, which is equivalent to 712.8 uW of power consumption. Positive linearity is achieved with Third-Order Intercept Point (IIP3) of 2 dBm, while the dynamic range which is represented by P1dB is -5.43 dBm. Noise figure of the mixer is found to be 23 dB. The ring oscillator consumes 740 μA which translate to 888 μW of power consumption. Phase noise achieved is -81 dBc/Hz at 160 kHz of offset frequency. The integrated modulator achieves power consumption of 1.88 mW,which is superior compared to other reported work. Battery life utilizing the proposed architecture can reach 13.8 hours compared to the average of 8 hours operational time. Die area utilized is merely 0.44 mm2 which allows better integration of other blocks in the capsule endoscope.
format	Thesis
qualification_level	Master's degree
author	Lioe, De Xing
author_facet	Lioe, De Xing
author_sort	Lioe, De Xing
title	Low power modulator for capsule endoscope
title_short	Low power modulator for capsule endoscope
title_full	Low power modulator for capsule endoscope
title_fullStr	Low power modulator for capsule endoscope
title_full_unstemmed	Low power modulator for capsule endoscope
title_sort	low power modulator for capsule endoscope
granting_institution	Universiti Putra Malaysia
publishDate	2013
url	http://psasir.upm.edu.my/id/eprint/47570/1/FK%202013%2043R.pdf
_version_	1747811941370298368

Low power modulator for capsule endoscope

Similar Items