This paper concerns fine analytical error estimates in analog-to-digital conversion of bandlimited functions using the method of sigma-delta modulation (also called Σ∆ quantization). This method has found widespread usage in practice due to several advantages in its implementation compared to conventional methods (see [1, 11]). A recent mathematical treatment of this problem appears in [3]. Bel...

High-speed broadband digital communication net­ works rely on digital multiplexing technology where clock synchro­ nization, including processing, transmission, and recovery of the clock, is the critical technique. This paper interprets the process of clock synchronization in multiplexing systems as quantizing and coding the information of clock synchronization, interprets clock justification a...

Sinusoidal signal can be used as stimulus to test static and dynamic parameters of ADC. A sigma-delta modulation based sinusoidal signal generator for ADC testing in SOC was introduced. The generator was built on the same chip with ADC. A numerical resonator generated a sinusoidal signal which was converted to a single bit stream by a sigma-delta modulator. Due to oversampling, the quantization...

In communication systems the present trend is to move the border between the analog and digital interface as close as possible to the point where information is received or emitted, in this way most of SoC functionalities are implemented in the digital domain. in this work an efficient first order sigma delta modulator has been designed in circuit level, considering the possible non-idealities ...

This paper presents a design and analysis of electromechanical sigma-delta modulator for MEMS gyroscope, which enables us to control the proof mass and to obtain an exact digital output without additional A/D conversion. The system structure and the circuit realization of the sigma-delta modulation are simpler than those of the analog sensing and feedback circuit. Based on the electrical sigma-...

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 inpu...

In transmission, storaging and coding of digital signals we frequently perform A/D conversion using quantization. In this paper we study the maxiaml and mean square errors as a result of quantization. We focus on the sigma-delta modulation quantization scheme in the finite frame expansion setting. We show that this problem is related to the classical Traveling Salesman Problem (TSP) in the Eucl...

Search Computing defines a new class of applications, which enable end users to perform exploratory search processes over multi-domain data sources available on the Web. These applications exploit suitable models, supported by a framework, that make it possible for expert users to configure the data sources to be searched and the interfaces for query submission and result visualization, by usin...

The increased performance of close series stacked tube axial fans due to the introduction of a diffuser element between the primary and secondary fan is investigated in this paper. Experimental results showed that there was a 15% increase on average in the performance of two stacked Delta FFB0412VHN 40 mm fans across their operating range when a diffuser element was introduced between the two f...

This paper describes how to extend the capabilities of SIMULINK for the time-domain simulation of ZA modulators implemented by using switched-capacitor, switched-current and continuous-time circuits. considering the most important error mechanisms. The behavioural models of these circuits are incorporated into the SIMULINK environment by using C-language S-function blocks, which leads to a dras...