Title :
A new two-path band pass Delta Sigma Modulator structure with tunability in filter resonance frequency
Author :
Moradpour, Abolfazl ; Khalili, Farnam ; Aghdam, Esmaeil Najafi
Author_Institution :
Electr. Eng. Fac., Sahand Univ. of Technol., Tabriz, Iran
Abstract :
This paper presents a new two-path resonator structure which is tunable in resonance frequency. Being able to tune NTF zeros, makes it possible to overcome circuit non-idealities effects on resonator performance. In addition, tunable band pass Delta Sigma Modulator (ΔΣM) can be used in multiband receivers. Using two-path structure leads to more relaxed circuit requirements and low power consumption. Second order ΔΣM using proposed tunable resonator is simulated in both system and circuit level to verify performance. Resonance frequency can be tuned from DC to half of the sampling frequency. Circuit level realization of proposed structure is designed and simulated in 180nm CMOS.
Keywords :
CMOS digital integrated circuits; circuit tuning; delta-sigma modulation; integrated circuit noise; resonator filters; transfer functions; CMOS; NTF zeros; circuit nonidealities effects; filter resonance frequency; noise transfer function; power consumption; second order ΔΣM; tunability; tunable band pass delta sigma modulator; tunable resonator; two-path band pass delta sigma modulator structure; two-path resonator structure; Conferences; Decision support systems; Electrical engineering; band pass delta sigma modulator; tunable resonator; two-path structure;
Conference_Titel :
Electrical Engineering (ICEE), 2015 23rd Iranian Conference on
Conference_Location :
Tehran
Print_ISBN :
978-1-4799-1971-0
DOI :
10.1109/IranianCEE.2015.7146422
