Title :
Tracking power converter for supply modulation of RF power amplifiers
Author :
Midya, Pallab ; Haddad, Ken ; Connell, Larry ; Bergstedt, Steve ; Roeckner, Bill
Author_Institution :
IC Design Technol., Motorola Labs., Schaumburg, IL, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper describes a tracking power converter and the controller IC for its implementation. The tracking power converter is used for supply modulation of a linear RF power amplifier. Supply modulation improves RF power amplifier efficiency for variable envelope RF signals. This system maximizes tracking bandwidth (~160 kHz), ripple suppression (~70 dB) and power conversion efficiency (~92%) with a relatively low switching frequency (800 kHz)
Keywords :
electric current control; integrated circuits; power convertors; power supplies to apparatus; radiofrequency amplifiers; 160 kHz; 800 kHz; 92 percent; controller IC; linear RF power amplifiers; low switching frequency; power conversion efficiency; ripple suppression; sensorless current mode control; supply modulation; tracking bandwidth maximisation; tracking power converter; variable envelope RF signals; Bandwidth; Impedance; Polynomials; Power amplifiers; Power supplies; RF signals; Radio frequency; Radiofrequency amplifiers; Sensorless control; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954338
