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Multi band sigma delta analog to digital conversion

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3 Author(s)
Aziz, P.M. ; Dept. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA ; Sorensen, H.V. ; Van der Spiegel, J.

A multi band approach to oversampled noise shaping analog to digital conversion is described. The multi band A/D converter breaks the signal band into several smaller bands and uses a different band reject noise shaping transfer function for each band. A FIR filter bank attenuates the out-of-band noise for each band and reconstructs the signal. This approach allows performance improvements over conventional noise shaping A/D converters which convert the entire signal band using one noise shaping transfer function. A design example and simulation results where a signal with 512 kHz bandwidth is converted to about 16 bits of resolution is presented

Published in:

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on  (Volume:iii )

Date of Conference:

19-22 Apr 1994