Title :
System-level requirements of DC-DC converters for dynamic power supplies of power amplifiers
Author :
Sahu, Biranchinath ; Rincon-Mora, Gabriel A.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The energy efficiency of battery-operated portable applications can be improved by increasing the efficiency of power amplifiers (PAs). By dynamically changing the supply voltage from the fixed battery supply using a DC-DC converter, the PA can be operated with high efficiency during power back-off. This paper presents the system level requirements for a buck converter and other blocks in a dynamic power supply scheme for PA. Simulation results for the effects of ripple in the power supply of the PA and delay mismatch using behavioral models of constituent blocks and circuit-level PA have been presented.
Keywords :
DC-DC power convertors; low-power electronics; power supply circuits; DC-DC converters; battery-operated portable applications; behavioral models; buck converter; delay mismatch; dynamic power supplies; efficiency; energy efficiency; power amplifiers; power back-off; ripple; system-level requirements; Batteries; Buck converters; Circuit simulation; DC-DC power converters; Delay effects; Energy efficiency; Power amplifiers; Power supplies; Power system modeling; Voltage;
Conference_Titel :
ASIC, 2002. Proceedings. 2002 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-7363-4
DOI :
10.1109/APASIC.2002.1031554
