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

Volume

1

fYear

2000

fDate

11-16 June 2000

Firstpage

139

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest. 2000 IEEE MTT-S International

Conference_Location

Boston, MA, USA

ISSN

0149-645X

Print_ISBN

0-7803-5687-X

Type

conf

DOI

10.1109/MWSYM.2000.860902

Filename

860902