A Polar Loop Transmitter with Digital Interface including a Loop-Bandwidth Calibration System

Author

Akamine, Y. ; Tanaka, Shoji ; Kawabe, Masahiko ; Okazaki, Tadatsugi ; Shima, Yuji ; Masahiko, Y. ; Yamamoto, Manabu ; Takano, Ryousei ; Kimura, Yuichi

Author_Institution

Hitachi, Tokyo

fYear

2007

fDate

11-15 Feb. 2007

Firstpage

348

Lastpage

608

Abstract

An RFIC with digital interface for GSM/EDGE is presented. The architecture is a polar loop transmitter and a direct conversion receiver. The transmitter draws 100mA in GSM and 130mA in EDGE modes. A loop-bandwidth calibration system that can keep the variation of the loop bandwidth to less than plusmn10% after a few microseconds calibration period is applied. The RFIC also contains a timing-control circuit to avoid having a zero PA output amplitude during the switching between GSM and EDGE

Keywords

3G mobile communication; cellular radio; radio transmitters; radiofrequency integrated circuits; 100 mA; 130 mA; EDGE; GSM; RFIC; digital interface; direct conversion receiver; loop-bandwidth calibration system; polar loop transmitter; timing-control circuit; Bandwidth; Calibration; Counting circuits; Frequency; GSM; Mobile handsets; Radiofrequency integrated circuits; Signal generators; Transmitters; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2007. ISSCC 2007. Digest of Technical Papers. IEEE International

Conference_Location

San Francisco, CA

ISSN

0193-6530

Print_ISBN

1-4244-0853-9

Electronic_ISBN

0193-6530

Type

conf

DOI

10.1109/ISSCC.2007.373437

Filename

4242408