An I/Q mismatch-free band-pass sigma-delta modulator for a digital if receiver

Minho Kwon, Gunhee Han

Research output: Contribution to conferencePaperpeer-review

Abstract

The proposed time-interleaved (TI) band-pass sigma-delta modulator (BPSDM) simultaneously provides two channel analog-to-digital conversions with sharing operational transconductance amplifiers (OTA) for in-phase/quadraturephase (I/Q) channels of a digital intermediate frequency (IF) system. The architecture leads to reduced silicon area and power consumption while suppressing the effects of I/Q channel mismatches. The proposed TI BPSDM block in I/Q channels was designed and simulated for a 30-MHz IF system with a 0.35-μm CMOS process. The simulated peak signal-to-noise-plus-distortion ratio (SNDR) for a 1.25-MHz bandwidth in each I/Q channels is approximately 61.2 dB with mismatches while dissipating 70 mW from a 3.3-V supply and occupying 1.78 mm2.

Original languageEnglish
Publication statusPublished - 2005
Event5th IEE International Conference on Advanced A/D and D/A Conversion Techniques and Their Applications, ADDA 2005 - Limerick, Ireland
Duration: 2005 Jul 252005 Jul 27

Conference

Conference5th IEE International Conference on Advanced A/D and D/A Conversion Techniques and Their Applications, ADDA 2005
Country/TerritoryIreland
CityLimerick
Period05/7/2505/7/27

Bibliographical note

Funding Information:
This work was supported in part by the Ministry of Information & Communications, Korea, under the Information Technology Research Center Support Program and the authors would like to show their appreciation to the CAD tool support from IC Design Education Center.

Publisher Copyright:
© 2005 Institution of Engineering and Technology. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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