A 9 GS/s 2.1..2.2 GHz bandpass delta-sigma modulator for Class-S power amplifier

Author

Ostrovskyy, P. ; Gustat, H. ; Scheytt, Ch ; Manoli, Y.

Author_Institution

IHP GmbH, Frankfurt (Oder), Germany

fYear

2009

fDate

7-12 June 2009

Firstpage

1129

Lastpage

1132

Abstract

A tunable fourth-order bandpass delta-sigma modulator (BDSM) designed and fabricated in 0.25 mum SiGe BiCMOS technology is presented. The input band can be tuned in a range of 2.1 to 2.2 GHz while clocking at 9 GHz. The modulator achieves 42-43 dB signal-to-noise ratio (SNR) in 10 MHz bandwidth with sine wave input over the tuning range consuming 270 mW from -3 V supply. Measurement results show that the circuit is well suited for Class-S power amplifier applications using WCDMA coding scheme. For a WCDMA modulated signal the modulator demonstrates less than 2.3 % of EVM over the full tuning range.

Keywords

BiCMOS integrated circuits; Ge-Si alloys; UHF filters; UHF integrated circuits; UHF power amplifiers; band-pass filters; code division multiple access; delta-sigma modulation; BiCMOS technology; SiGe; UHF filters; UHF power amplifiers; WCDMA coding; bandpass filters; bandwidth 10 MHz; delta-sigma modulator; frequency 2.1 GHz to 2.2 GHz; frequency 9 GHz; power 270 mW; size 0.25 mum; voltage -3 V; BiCMOS integrated circuits; Circuit optimization; Clocks; Delta modulation; Germanium silicon alloys; Multiaccess communication; Power amplifiers; Signal to noise ratio; Silicon germanium; Tunable circuits and devices; WCDMA; bandpass ADC; class-S; continuous time; power amplifiers; sigma-delta modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5165900

Filename

5165900