A continuous-time ΣΔ modulator with noise shaped blocker filtering for universal mobile TV receiver

Author

Mohieldin, Ahmed N. ; Elwan, Hassan O. ; Emira, Ahmed A.

Author_Institution

Electr. Eng. Dept., Cairo Univ., Cairo, Egypt

fYear

2010

fDate

20-23 June 2010

Firstpage

249

Lastpage

252

Abstract

A low-voltage 5^th-order continuous-time ΣΔ modulator for a universal mobile TV receiver is presented. A unique feature of the proposed modulator is the blocker filtering provided using a 3^rd order notch filter employing frequency dependent negative resistance (FDNR). The noise added by the FDNR is shaped. The modulator employs 3-level switched-capacitor DAC in the feedback. It has been implemented in 65nm CMOS process and occupies an area of 0.26mm². It consumes 6mA from a single 1.2V supply at a sampling frequency of 146MS/s while providing 70dB of dynamic range in 3.85MHz bandwidth.

Keywords

CMOS integrated circuits; continuous time systems; mobile television; notch filters; sigma-delta modulation; switched capacitor networks; television receivers; 3rd order notch filter; CMOS process; bandwidth 3.85 MHz; continuous-time ΣΔ modulator; continuous-time sigma-delta modulator; current 6 mA; frequency dependent negative resistance; noise shaped blocker filtering; size 65 nm; switched-capacitor digital-analog converters; universal mobile TV receiver; voltage 1.2 V; Bandwidth; Capacitors; Dynamic range; Modulation; Noise; Receivers; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

NEWCAS Conference (NEWCAS), 2010 8th IEEE International

Conference_Location

Montreal, QC

Print_ISBN

978-1-4244-6806-5

Electronic_ISBN

978-1-4244-6804-1

Type

conf

DOI

10.1109/NEWCAS.2010.5603931

Filename

5603931