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Leakage Reduction

  • Baker Mohammad
Chapter
Part of the Analog Circuits and Signal Processing book series (ACSP, volume 116)

Abstract

The use of batteries in hardware targeted for handheld and cell phone applications necessitates that the product meets stringent energy requirements. Leakage current (i.e., the current flowing through the device during its “off” state) has increased drastically with technology scaling [63, 64]. Leakage minimization in standby mode is important for chips in general, but is critical for handhelds and mobile phones because such products have long idle times and limited energy to spare. The leakage power often determines the standby time a product can last before its battery is drained. Equations 6.1 and 6.2 relate the battery operation time to the different types of power in the system. Psleep is wasted energy due to leakage and it is desired to make it close to zero. Pmode is the power wasted due to switching from one mode (active, sleep) into another mode.
$$ {T}_{battery}\approx \frac{E_{battery}}{P_{avg}} $$
$$ {P}_{avg}={P}_{always- on}+{P}_{sleep}+{P}_{mode}+\frac{E_{active}}{T} $$
$$ {T}_{battery}\ lifetime\ of\ the\ battery\kern1em \mathrm{and}\kern1em {P}_{avg}\ average\ power\ consumed. $$
$$ {E}_{battery}\ energy\ that\ can\ be\ delivered\ by\ the\ battery $$
$$ {E}_{active}\ energy\ consumed\ in\ active\ mode $$

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Baker Mohammad
    • 1
  1. 1.Khalifa University of Science, Technology and ResearchAbu DhabiUnited Arab Emirates

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