Title :
A new kind of low-power multibit third order continuous-time lowpass ΣΔ modulator
Author :
Samid, Lourans ; Ortmanns, Maurits ; Manoli, Yiannos ; Gerfers, Friedel
Author_Institution :
Freiburg Univ., Germany
Abstract :
This paper presents the design of a multi-bit-third-order low pass sigma-delta modulator using a continuous-time (CT) loop filter. The goal is to reduce the power consumption and the area of the modulator. The new notion is to use a successive approximation (SA) A/D converter as 4-bit quantizer in the sigma-delta-modulator. Simulation results of the CT sigma-delta modulator show a 95 dB signal to noise ratio in a bandwidth of 50 kHz and oversampling ratio (OSR) of 32.
Keywords :
continuous time filters; low-power electronics; quantisation (signal); sigma-delta modulation; 4 bit; 50 kHz; continuous-time loop filter; low-power multibit ΣΔ modulator; oversampling ratio; power consumption; quantizer; signal to noise ratio; successive approximation A/D converter; third order continuous-time lowpass ΣΔ modulator; Batteries; Circuits; Costs; Delta modulation; Delta-sigma modulation; Filters; Flip-flops; Microelectronics; Power dissipation; Sampling methods;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010218
