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Embedded Programmable Web-based ECG Monitoring &

etection System Using a Fast Algorithm

http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4435068

Design of a High-Speed Differential Frequency-to-Voltage Converter and Its Application

This paper appears in:Circuits and Systems I: Regular Papers, IEEE Transactions onIssue Date: April 2008Volume: 55 Issue:3On page(s): 766 - 774ISSN: 1549-8328References Cited: 22INSPEC Accession Number: 9944377Digital Object Identifier:10.1109/TCSI.2008.916397Date of Current Version: 02 May 2008Sponsored by:IEEE Circuits and Systems Society

ABSTRACT

This paper presents a new algorithm and circuit implementation for high-speedfrequency-to-voltage converters (FVC). The proposed system overcomes thedeficiencies of a previously reported converter and can operate about 20 timesfaster. To validate this FVC and show its usefulness, it was used in the design ofa frequency locked loop. For the design of this loop, it was found that existinganalytical models were incomplete in that they neglect the delay associated to

frequency measurements. We proposed a new model which, unlike previouswork, shows that frequency locked loops can potentially be unstable. Simulationsconfirm this fact and also show that the proposed implementation can operate at5 KHz. To validate the results, a prototype circuit has been fabricated in a 0.18-mum CMOS technology. Tests performed on the prototype show that it runsreliably at 3.84 GHz and consumes 77.4 mW with a 1.8-V power supply whenbiasing circuitry is included.

This paper appears in:Circuits and Systems (ISCAS), Proceedings of 2010 IEEEInternational Symposium onIssue Date: May 30 2010-June 2 2010

On page(s): 3088 - 3091Location: ParisPrint ISBN: 978-1-4244-5308-5INSPEC Accession Number: 11463305Digital Object Identifier: 10.1109/ISCAS.2010.5537986Date of Current Version: 03 August 2010

ABSTRACT

http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4435068http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8919http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=4509511http://dx.doi.org/10.1109/TCSI.2008.916397http://www.ieee-cas.org/http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5512009http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5512009http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4435068http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8919http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=4509511http://dx.doi.org/10.1109/TCSI.2008.916397http://www.ieee-cas.org/http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5512009http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5512009

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This paper presents a low-cost CMOS voltage-to-frequency converter (VFC) withalmost full-scale input operating range for front-end smart sensor interfaces inwireless sensor networks (WSN) applications. The proposed VFC, designed in a0.35m CMOS technology supplied at 3 V, is a cost-effective circuit, exhibiting atthe same time high performance characteristics: it operates with a powerconsumption below 0.8 mW at output frequencies ranging from 0.1 MHz to 2.7

MHz with an error below 4 % given a 0.1-2.7 V input (1 MHz/V sensitivity).

This paper appears in:Computing, Communication, Control, and Management, 2008.CCCM '08. ISECS International Colloquium onIssue Date: 3-4 Aug. 2008On page(s): 123 - 126Location: GuangzhouPrint ISBN: 978-0-7695-3290-5INSPEC Accession Number: 10202757Digital Object Identifier:10.1109/CCCM.2008.106Date of Current Version: 29 August 2008

ABSTRACT

This paper designed a DC motor speed control system. The controller is ARMS3C2410, and the operating system is muC/OS-II, a real time operating system.Designed a closed loop system of motor speed control, adopted the algorithm ofPWM to control the armature voltage, and motor speed is controlled byregulating, of armature voltage. The system has a good respondence.

http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=4609447http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=4609447http://dx.doi.org/10.1109/CCCM.2008.106http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=4609447http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=4609447http://dx.doi.org/10.1109/CCCM.2008.106