Title :
A 14b 20mW 640MHz CMOS CT /spl Delta//spl Sigma/ ADC with 20MHz Signal Bandwidth and 12b ENOB
Author :
Mitteregger, G. ; Ebner, C. ; Mechnig, S. ; Blon, T. ; Holuigue, C. ; Romani, E. ; Melodia, A. ; Melini, V.
Author_Institution :
Xignal Technol., Munich
Abstract :
A 3rd-order single-loop CT DeltaSigma modulator with a 4b internal quantizer operating at 640MHz achieves 76dB SNR, -78dB THD, and 74dB SINAD in a 20MHz signal bandwidth with an OSR of 16. The modulator operates between 20 to 40MS/S output data rate and dissipates 20mW from a 1.2V supply at 40MS/S. The degradation of stability due to excess loop delay is solved with a quantizer feedback architecture
Keywords :
CMOS integrated circuits; delta-sigma modulation; quantisation (signal); 1.2 V; 20 MHz; 20 mW; 640 MHz; CMOS; CT DeltaSigma ADC; ENOB; loop delay; quantizer feedback architecture; Bandwidth; CMOS technology; Clocks; Computed tomography; Delay; Feedback; Resonator filters; Sampling methods; Stability; Switches;
Conference_Titel :
Solid-State Circuits Conference, 2006. ISSCC 2006. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0079-1
DOI :
10.1109/ISSCC.2006.1696042
