A Novel Channel Randomization Method for Time-Interleaved ADCs

Author

Vogel, Christian ; Pammer, Viktoria ; Kubin, Gernot

Author_Institution

Christian Doppler Lab. for Nonlinear Signal Process., Graz Univ. of Technol.

Volume

1

fYear

2005

fDate

16-19 May 2005

Firstpage

150

Lastpage

155

Abstract

We introduce a novel randomization method for time-interleaved analog-to-digital converters (TIADCs). In contrast to conventional randomization methods our method improves the signal-to-noise and distortion ratio (SINAD) and the spurious free dynamic range (SFDR) by combining randomization of channel ADCs and spectral shaping of timing mismatches. The new method can exploit information about timing mismatches of the channel ADCs in order to optimize the randomized sequence. We provide the theoretical background, discuss aspects of the advanced randomization, and present simulation results

Keywords

analogue-digital conversion; random processes; random sequences; spectral analysis; timing; channel randomization method; randomized sequence optimization; spectral shaping; spurious free dynamic range; time-interleaved ADC; time-interleaved analog-to-digital converters; timing mismatch; Analog-digital conversion; Digital filters; Dynamic range; Frequency; Laboratories; Nonlinear distortion; Random number generation; Sampling methods; Signal processing; Timing; compensation; randomization; spectral shaping; time-interleaved; timing mismatches;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE

Conference_Location

Ottawa, Ont.

Print_ISBN

0-7803-8879-8

Type

conf

DOI

10.1109/IMTC.2005.1604089

Filename

1604089