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Erschienen in:
2002 | OriginalPaper | Buchkapitel
Optimum supply strategies for Power Amplifiers in cellular phones
verfasst von : Henk Jan Bergveld, Wanda S. Kruijt, Peter H. L. Notten
Erschienen in: Battery Management Systems
Verlag: Springer Netherlands
Enthalten in: Professional Book Archive
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The market for cellular phones is growing rapidly and cellular phones rank among the most prominent portable devices. All these phones are battery-powered and long use times on a single battery charge are required. The Power Amplifier (PA) draws most of the current from the battery in talk mode. Therefore, a reduction in this current will lead to a significant increase in talk time. This chapter covers powering the PA with the optimum supply voltage for each output power, which leads to a decrease in supply current. As described in chapter 1, this is one of the basic tasks of a Battery Management System.