A theory of smart loudspeaker arrays is described where a modified Fourier technique yields complex filter coefficients to determine the broadband radiation characteristics of a uniform array of micro drive units. Beam width and direction are individually programmable over a 180-degree arc, where multiple agile and steerable beams carrying dissimilar signals can be accommodated. A novel method ...

Nowadays, the development of the IC technology resulted in a growth of digital systems. Thus, Analog to Digital converters have become important. The important criteria of an ADC are resolution, speed and power. Among them, speed plays an important role to be enabling faster and more reliable for data processing. This paper describes a successive approximation ADC that uses a charge-redistribut...

Abstrac tIn the paper, the enhanced version of time-to-digital converter with self-timed successive charge redistribution is presented. In the proposed solution, time-to-charge mapping realized by constant rate charge accumulation is run concurrently to the charge redistribution in the binary-weighted capacitor array. By introducing concurrent charge accumulation and redistribution, the convers...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Petri Eloranta Name of the doctoral dissertation Direct-Digital RF Modulator for Multi-Standard Radio Transmitters Publisher School of Electrical Engineering Unit Department of Micro and Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 186/2014 Field of research Electronic Circuit Design Manuscrip...

In this paper, a novel analog gamma correction scheme with a logarithmic image sensor dedicated to minimize the quantization noise of the high dynamic applications is presented. The proposed implementation exploits a non-linear voltage-controlled-oscillator (VCO) based analog-to-digital converter (ADC) to perform the gamma correction during the analog-to-digital conversion. As a result, the qua...

A new architecture is presented for a single-chip tuner for digital terrestrial television, based on existing double conversion and direct conversion topologies. The new design forms part of a mixed-signal Digital Video Broadcasting–Terrestrial (DVB-T) receiver system, employing digital signal processing at baseband to ensure minimal performance requirements for the analog circuitry. To evaluat...

This document describes digital audio sampling-rate conversion and related concepts. Opensource software is provided, and pointers are given to related projects and papers.

by Jeffrey Beall [email protected] University of Colorado at Denver and Health Sciences Center, Downtown Denver Campus Abstract This paper describes the main types of data quality errors that occur in digital libraries, both in full-text objects and in metadata. Studying these errors is important because they can block access to online documents and because digital libraries should eli...

This document describes digital audio sampling-rate conversion and related concepts. Open-source software is provided, and pointers are given to related projects and papers.

This paper describes a technique for digital error correction in pipelined analog-digital converters. It makes use of a slow, high resolution ADC in conjunction with an LMS algorithm to perform error correction in the background during normal conversion. The algorithm will be shown to correct for errors due to capacitor ratio mismatch, finite amplifier gain and charge injection within the same ...