Stability and Performance Analysis of an AdaptiveSigma Delta
نویسندگان
چکیده
IEEE Trans. Circuits Syst II, vol. 48, no. 3, pp. 233{244, March 2001 Stability and Performance Analysis of an Adaptive Sigma Delta Modulator Mansour A. Aldajani, Student Member, IEEE, and Ali H. Sayed, Fellow, IEEE Abstract| This work develops an adaptive sigma delta modulator that is based on adapting the quantizer stepsize using estimates of the quantizer input rather than the modulator input. The adaptive modulator with a rst-order noise shaping lter is shown to be Bounded-Input BoundedOutput (BIBO) stable. Moreover, an analytical expression for the signal-to-noise ratio is derived, and it is shown to be independent of the input signal strength. Simulation results con rm the SNR performance and indicate considerable improvement in the dynamic range of the modulator compared to earlier structures. Keywords| Sigma delta modulation, adaptive step-size, quantization, dynamic range, stability.
منابع مشابه
Comparison of Delta- PCR and Conventional Fragment Analysis for the Detection of FLT3-ITD Mutations in Paired Diagnosis-Relapse Samples of Patients with Acute Myeloid Leukemia
Background & Objective: FLT3-ITD mutation detection has been an integral part of diagnostic work ups focused on acute myeloid leukemia. However, some studies have indicated that the mutation is unstable during the various stages of the disease. The purpose of this study was to evaluate the stability of this marker in paired diagnosis-relapse samples using Delta-PCR method. Materials & Methods:...
متن کاملHomozygous delta-beta Thalassemia in a Child: a Rare Cause of Elevated Fetal Hemoglobin
Abstract Background Delta beta (δβ) thalassemia is an unusual variant of thalassemia with elevated level of fetal hemoglobin (HbF). Homozygous patients of this disorder, unlike β-thalassemia, show mild anemia. Only few cases of δβ-thalassemia have been reported from India in the available indexed English literature. Case presentation A four-year old male child was evaluated for recent-onset...
متن کاملPerformance Scrutiny of Two Control Schemes Based on DSM and HB in Active Power Filter
This paper presents a comparative analysis between two current control strategies, constant source power and generalized Fryze current, used in Active Power Filter (APF) applications having three different modulation methods. The Hysteresis Band (HB) and first-order Delta-Sigma Modulation (DSM) as well as the second-order DSM is applied. The power section of the active power filter is viewed as...
متن کاملAn Experimental Investigation of the Effects of Canard Position on the Aerodynamic Forces of a Fighter Type Configuration Model
An extensive experimental investigation is conducted to study the effect of canard position relative to the fuselage reference line on the aerodynamic forces of a fighter type configuration model. Aerodynamic forces at different flight conditions are measured in a subsonic wind tunnel. The wing and the canard have triquetrous shapes. Experiments are conducted at Reynolds number of 342209 and at...
متن کاملAn Investigation into Credit Receipt and Enterprise Performance among Small Scale Agro Based Enterprises in the Niger Delta Region of Nigeria
The study was designed to analyze credit receipt and enterprise performance by small scale agro based enterprises in the Niger Delta region of Nigeria. A multistage sampling technique was adopted in selecting 264 agro based enterprises and 96 agro based enterprises that accessed informal and formal credit respectively. The Heckman model was used to examine the factors affecting amount of inform...
متن کامل