Title :
A second order hybrid continuous-discreet time sigma-delta modulator
Author :
Ducu, Dragos ; Manolescu, Andrei
Author_Institution :
Microchip Technol., MCHP, Bucharest, Romania
Abstract :
This paper describes a new second order hybrid sigma delta modulator where the discreet time filter is realized with fully differential current conveyor. The hybrid integrator, which is a combination of an analog integrator and a digital integrator, offers an increased dynamic range and helps make the resulting high-order sigma delta modulator stable. The convertor has been designed in a 0.18um TSMC technology and achieves a maximum signal to noise ratio 80dB in a 500KHz bandwidth and dissipates 23mW at 1.8V power supply.
Keywords :
continuous time filters; current conveyors; discrete time filters; hybrid integrated circuits; sigma-delta modulation; TSMC technology; analog integrator; digital integrator; discreet time filter; fully differential current conveyor; hybrid integrator; second order hybrid sigma delta modulator; signal-noise ratio; Bandwidth; Capacitors; Converters; Modulation; Sigma-delta modulation; Signal to noise ratio; Continuous time; Discreet time; Hybrid Convertor; Modulator; Sigma-Delta;
Conference_Titel :
Electronics, Computers and Artificial Intelligence (ECAI), 2013 International Conference on
Conference_Location :
Pitesti
Print_ISBN :
978-1-4673-4935-2
DOI :
10.1109/ECAI.2013.6636201
