Agile multi-band delta-sigma frequency synthesizer architecture

Author

Bourdi, T. ; Borjak, A. ; Kale, I.

Author_Institution

Dept. of Electron. Syst., Univ. of Westminster, London, UK

Volume

5

fYear

2002

fDate

2002

Abstract

The emerging cellular and wireless standards necessitate the development of multi-mode transceiver systems. The main challenge in such systems is to have a common frequency synthesizer architecture acting as the local oscillator. In this paper, we propose a multi-band delta-sigma modulator based synthesizer architecture. This novel synthesizer architecture has been successfully implemented in an RF-CMOS process. The synthesized frequencies include the GSM, PCS and DCS bands.

Keywords

CMOS integrated circuits; UHF integrated circuits; cellular radio; delta-sigma modulation; frequency synthesizers; mixed analogue-digital integrated circuits; phase locked loops; transceivers; DCS bands; GSM bands; PCS bands; RF CMOS process; delta-sigma frequency synthesizer architecture; delta-sigma modulator; local oscillator; multi-band frequency synthesizer architecture; multi-mode transceiver systems; noise shaped fractional-n PLL; Filters; Frequency conversion; Frequency synthesizers; Low-frequency noise; Multi-stage noise shaping; Noise figure; Noise generators; Noise shaping; Phase noise; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1010728

Filename

1010728