DIRECT-CONVERSION BANDPASS SIGMA-DELTA MODULATOR

Authors
TAO H KHOURY JM
Citation
H. Tao et Jm. Khoury, DIRECT-CONVERSION BANDPASS SIGMA-DELTA MODULATOR, Electronics Letters, 33(15), 1997, pp. 1282-1283
Citations number
7
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
Electronics Letters → ACNP
ISSN journal
00135194
Volume
33
Issue
15
Year of publication
1997
Pages
1282 - 1283
Database
ISI
SICI code
0013-5194(1997)33:15<1282:DBSM>2.0.ZU;2-8
Abstract
A bandpass sigma-delta modulation analogue-to-digital (A/D) converter that uses direct conversion to baseband with in phase and quadrature p aths within the feedback loop is described. The bandpass input signal is processed with continuous-time circuitry and the I/Q baseband signa ls are processed with switched-capacitor circuits. Experimental and si mulation results indicate that the passband centre frequency can be ma ximised while suppressing the effects of I/Q mismatches.