Title :
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.
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-8879-8
DOI :
10.1109/IMTC.2005.1604089
