Title :
Multi band sigma delta analog to digital conversion
Author :
Aziz, Pervez M. ; Sorensen, Henrik V. ; Van der Spiegel, Jan
Author_Institution :
Dept. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA
Abstract :
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
Keywords :
FIR filters; analogue-digital conversion; band-pass filters; filtering theory; sigma-delta modulation; signal reconstruction; signal sampling; transfer functions; 16 bit; 512 kHz; FIR filter bank; analog to digital conversion; bandwidth; multiband A/D converter; multiband sigma delta ADC; multiband sigma delta modulation; noise shaping transfer function; out-of-band noise attenuation; oversampled noise shaping; performance; resolution; signal band; signal reconstruction; simulation results; Analog-digital conversion; Bandwidth; Delta modulation; Delta-sigma modulation; Filter bank; Finite impulse response filter; Noise shaping; Sampling methods; Signal resolution; Transfer functions;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.390021
