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Theory of super power saving circuits and configurations for mixed signal CPU for smartcard application
Linköping University, Department of Electrical Engineering.
2004 (English)Independent thesis Basic level (professional degree)Student thesisAlternative title
Teori om extremt energisparande kretsar och konfigurationer för mixed signal CPU för smartcard applikation (Swedish)
Abstract [en]

Designing an application specific integrated circuit (ASIC) must be starting with careful preparations, otherwise the chip will not be as good as possible. The theoretical studies must cover everything from the chip circuits to the application structure. In mobile applications there is extremely important that the current consumption becomes minimized because the battery power is limited. The power reductions studies must include the most power costing circuits on the chip. When the whole circuit or segments of the circuit is not in use, they must switch fast and simple into another mode that consume nearly none power. This mode is called sleep-mode. If the sleep-mode has very low leakage currents, the lifetime of the application will dramatically increase.

This report studies the most power costing circuits in smartcard application ASIC. The chip should be used to control a LCD display on the smartcard. The circuits that have been investigated are level shifters, charge pumps and LCD drivers, also sleep-mode configuration possibilities have been investigated. Other small preparing work is also included in the thesis.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2004. , 91 p.
LiTH-ISY-Ex, 3538
Keyword [en]
Electronics, charge pump, sleep-mode, level shifter, cholesteric, liquid crystal, smartcard, DC-DC converter, MTCMOS, display driving, assembler, voltage doubler, low power
Keyword [sv]
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-2326OAI: diva2:19657
Available from: 2004-06-01 Created: 2004-06-01

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