An L-band Direct-Digital QPSK Modulator in CMOS

Author

El-Gabaly, Ahmed M. ; Jackson, Brad R. ; Saavedra, Carlos E.

Author_Institution

Queen´´s Univ., Kingston

fYear

2007

fDate

July 30 2007-Aug. 2 2007

Firstpage

563

Lastpage

566

Abstract

A new direct-digital quadrature phase shift keying (QPSK) modulator is proposed for portable wireless applications. Its compact yet effective design includes passive phase shifters, active baluns and pass transistors for low-power operation. The integrated circuit (IC) has been implemented in a low-cost 0.18 um complimentary metal-oxide semiconductor (CMOS) process with a 1.8 V supply. Experimental results at 1.7 GHz show solid performance with the data transmission rate and carrier rejection exceeding 20 Mbps and 40 dB respectively.

Keywords

CMOS integrated circuits; UHF integrated circuits; modulators; quadrature phase shift keying; radiocommunication; CMOS; L-band direct-digital QPSK modulator; active baluns; complimentary metal-oxide semiconductor process; frequency 1.7 GHz; integrated circuit; pass transistor; passive phase shifter; portable wireless application; quadrature phase shift keying; size 0.18 mum; voltage 1.8 V; CMOS integrated circuits; CMOS process; Data communication; Impedance matching; L-band; MOS devices; Phase modulation; Phase shifters; Quadrature phase shift keying; Solids; CMOS integrated circuits; Digital modulation; portable radio communication; quadrature phase shift keying;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Electronics, 2007. ISSSE '07. International Symposium on

Conference_Location

Montreal, Que.

Print_ISBN

1-4244-1448-2

Electronic_ISBN

1-4244-1449-0

Type

conf

DOI

10.1109/ISSSE.2007.4294538

Filename

4294538