Title :
A multibit continuous time sigma delta modulator with successive-approximation quantizer
Author :
Samid, Lourans ; Mano, Yiannos
Author_Institution :
ATMEL
Abstract :
This paper discusses the design of a multibit sigma-delta modulator using a continuous time (CT) loop filter and a successive approximation (SA) A/D converter as multibit quantizer instead of the usual flash converter. This results in reduced circuit complexity as well as lower power dissipation and area. Measured results of a second order CT modulator with three bits quantizer show 58 dB SNR and 120 muW power dissipation with an OSR of 16 and a power supply equal to 1.5 V
Keywords :
circuit complexity; continuous time filters; quantisation (signal); sigma-delta modulation; 1.5 V; 120 muW; A/D converter; circuit complexity; continuous time loop filter; flash converter; multibit continuous time modulator; multibit quantizer; multibit sigma delta modulator; power dissipation; second order CT modulator; successive-approximation quantizer; Clocks; Delta modulation; Delta-sigma modulation; Feedback; Filters; Jitter; Power dissipation; Power supplies; Signal design; Signal resolution;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693247
