Title :
Low power sigma delta converter with SAR ADC for audio frequencies
Author :
Akcakaya, F. Melih ; Dundar, Gunhan
Author_Institution :
Bogazici Univ., Istanbul, Turkey
Abstract :
A low power second order feedforward sigma delta converter is described in this paper. A 3 bit SAR is used in the design as ADC and the coefficients of the SAR are used to sum the feedforward signals in the design. A telescopic cascode opamp is used as integrator. As a result, 76.8dB SNR is achieved with 20μW power consumption for 25kHz signal bandwidth and 32 OSR in 0.18μm CMOS technology.
Keywords :
CMOS integrated circuits; feedforward; low-power electronics; operational amplifiers; sigma-delta modulation; 3 bit SAR; audio frequencies; bandwidth 25 kHz; feedforward signals; integrator; low power feedforwardsigma delta converter; power 20 muW; second order sigma delta converter; size 0.18 mum; successive approximation register; telescopic cascode opamp; word length 3 bit; Bandwidth; Feedforward neural networks; Modulation; Power demand; Quantization (signal); Sigma-delta modulation; Signal to noise ratio; Audio Frequencies; Discrete Time; Low Power; SAR; Second Order; Sigma Delta;
Conference_Titel :
Faible Tension Faible Consommation (FTFC), 2013 IEEE
Conference_Location :
Paris
Print_ISBN :
978-1-4673-6105-7
DOI :
10.1109/FTFC.2013.6577769
