Title :
A 4th-order switched-capacitor sigma-delta A/D converter using a high-ripple Chebyshev loop filter
Author :
Snoeij, M.F. ; Bajdechi, O. ; Huijsing, J.H.
Author_Institution :
Lab. of Electron. Instrum., Delft Univ. of Technol., Netherlands
Abstract :
A compact low-power audio sigma-delta A/D converter is presented. By using a high-ripple Chebyshev loop filter the output swing of the integrators is reduced, which decreases power consumption and chip area. Measurements on the implementation show a peak SNDR of 91 dB and a dynamic range of 102 dB over a signal bandwidth of 11 kHz. The power consumption of the sigma-delta loop is 1.5 mW at a supply voltage of 2.5 V
Keywords :
Chebyshev filters; audio signal processing; integrating circuits; low-power electronics; sigma-delta modulation; switched capacitor networks; 1.5 mW; 11 kHz; 2.5 V; chip area; dynamic range; fourth-order switched-capacitor sigma-delta A/D converter; high-ripple Chebyshev loop filter; integrators; low-power audio A/D converter; output swing; peak SNDR; power consumption; Chebyshev approximation; Circuit topology; Delta-sigma modulation; Dynamic range; Energy consumption; Filters; Semiconductor device measurement; Switching converters; Transfer functions; Voltage;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921931
