Title :
A fast response, programmable PA regulator subsystem for dual mode CDMA/AMPS handsets
Author :
Ali, I. ; Griffith, R.
Author_Institution :
Design & Platform Oper., Motorola Inc., Tempe, AZ, USA
Abstract :
A low drop-out linear regulator, designed specifically for RF Power Amplifier (PA) applications, has been integrated as part of a multi-function power management integrated circuit for CDMA cellular handsets. The regulator, which utilizes an external PMOS pass transistor, is programmable from either an internal 4 bit DAC or an external reference voltage and is stable with an output filter capacitance as low as 1 /spl mu/F.
Keywords :
UHF power amplifiers; cellular radio; code division multiple access; power control; power electronics; programmable circuits; telephone sets; transceivers; cellular handsets; dual mode CDMA/AMPS handsets; external reference voltage; fast response regulator subsystem; internal 4 bit DAC; low drop-out linear regulator; multi-function power management IC; programmable PA regulator subsystem; Application specific integrated circuits; Energy management; Filters; Multiaccess communication; Radio frequency; Radiofrequency amplifiers; Radiofrequency integrated circuits; Regulators; Telephone sets; Voltage;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.860902
