Direct-conversion bandpass sigma-delta modulator
- 17 July 1997
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 33 (15) , 1282-1283
- https://doi.org/10.1049/el:19970888
Abstract
A bandpass sigma-delta modulation analogue-to-digital (A/D) converter that uses direct conversion to baseband with in phase and quadrature paths within the feedback loop is described. The bandpass input signal is processed with continuous-time circuitry and the I/Q baseband signals are processed with switched-capacitor circuits. Experimental and simulation results indicate that the passband centre frequency can be maximised while suppressing the effects of I/Q mismatches.Keywords
This publication has 1 reference indexed in Scilit:
- Optimal (bandpass) continuous-time ΣΔ modulatorPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002