شماره ركورد كنفرانس :
3926
عنوان مقاله :
A Search Algorithm to Design Optimum CT ∆Σ Modulator with Finite GBW Amplifiers
پديدآورندگان :
Hasanzadeh Mohammad Reza mhasanzadeh@iust.ac.ir Microelectronics Lab. School of Electrical Engineering Iran University of Science and Technology Tehran, Iran, 1684613114 , Abrishamifar Adib abrishamifar@iust.ac.ir Associate Professor School of Electrical Engineering Iran University of Science and Technology Tehran, Iran, 1684613114
كليدواژه :
CT ΔΣ Modolator , ADC , Loop Filter Design
عنوان كنفرانس :
بيست و چهارمين كنفرانس مهندسي برق ايران
چكيده فارسي :
In this paper an algorithm of designing continuous time delta-sigma (CT ∆Σ) modulators is presented. The proposed algorithm is based on computing the coefficients of loop filter while the amplifiers have finite gain-band-width (GBW). A 3rd order CT modulator with 20 MHz signal bandwidth has been designed as a case study. With some mathematical formulas in MAPLE and MATLAB, a robust procedure has been developed to achieve optimum design for saving power consumption and reducing chip area, while the modulator is stable with respect to variations due to temperature and fabrication process. Simulation results show that the specifications of designed modulators are close to the ideal ones
