Title :
A 10MHz continuous time bandpass delta sigma modulator
Author :
Lieu, Don T. ; Weldon, Thomas P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of North Carolina at Charlotte, Charlotte, NC, USA
Abstract :
This paper presents a continuous-time bandpass delta-sigma modulator using two integrators as a resonator. In the proposed approach, cross-coupled differential pairs are used as subtractors to provide good isolation between input and feedback signals. The delta-sigma modulator is designed for a 10 MHz signal frequency with a 40 MHz sampling frequency. A prototype integrated circuit was fabricated using 0.5 micron CMOS technology.
Keywords :
delta-sigma modulation; CMOS technology; continuous time bandpass delta sigma modulator; cross-coupled differential pairs; frequency 10 MHz; frequency 40 MHz; integrators; resonator; subtractors; Band pass filters; Microwave filters; Modulation; Noise; Power amplifiers; Resonant frequency; Transfer functions;
Conference_Titel :
Southeastcon, 2012 Proceedings of IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-1374-2
DOI :
10.1109/SECon.2012.6196890
