This article proposes a current-mode square-rooting circuit using current follower transconductance amplifier (CTFA). The amplitude of the output current can be electronically controlled via input bias current with wide input dynamic range. The proposed circuit consists of only single CFTA. Without any matching conditions and external passive elements, the circuit is then appropriate for an IC ...

This paper deals with the selection of the spreading sequences for the downlink and the uplink Multi-Carrier Code Division Multiple Access systems with the aim of minimizing the Multiple Access Interference and the dynamic range of the transmitted multicarrier signal.

A novel front projection system is introduced for the purpose of material and color design. The system explores techniques for simulation of color on real objects lit by projectors. Choice of size, shape, and color of the target projection object is considered. Ambient lighting conditions are controlled, and a second projector is used as the light source. This permits the target projection obje...

In this paper, two possible switched capacitor implementations of companding lters are discussed. The governing di erence equations, an estimate of the increase in the dynamic range for a given power consumption and possible topologies are given.

Multi-projector displays exhibit severe luminance variation. Matching luminance at every pixel to the pixel with most limited luminance range leads to severe degradation in the dynamic range of the display, rendering it practically useless. We present a new optimization technique to manage the luminance in a smooth constraint manner to maintain a perceptual seamlessness while improving the dyna...

In this project RCMs were applied to all these regions listed in Table 7.1 with the exception of the chest region. Examples of images with and without RCM are provided and discussed in this chapter. Appropriate and inappropriate use of factors that alter RCMs is also discussed, together with a comparison of RCM and other techniques used for dynamic range control. Specifically applied digital RC...

We use semi-analytic models of structure formation to interpret gravitational lensing measurements of substructure in galaxy cluster cores (R≤250h−1kpc) at z = 0.2. The dynamic range of the lensing-based substructure fraction measurements is well matched to the theoretical predictions, both spanning fsub∼ 0.05 − 0.65. The structure formation model predicts that fsub is correlated with cluster a...

Speech produced under real conditions (not a recording studio, nor a quiet room) is not always equally intelligible due to the presence of background noise. This noise may mask part of the speech signal such that not all speech information is available to the listener. The ability to detect speech in noise plays a significant role in our communication with others. In this work we suggest the us...

A deep radio observation of the A2255 cluster of galaxies has been carried out at 1.4 GHz with the Very Large Array synthesis telescope. Thanks to the excellent (u,v) coverage and sensitivity achieved by our observation, the low brightness diffuse extended sources in the cluster (radio halo and relic) have been imaged with unprecedented resolution and dynamic range. We find that the radio halo ...

onceptualizing and executing space missions calls for creative thinking coupled with careful and conservative implementation. The engineers and scientists who design such missions must master a “wide dynamic range” of techniques, from brainstorming to design reviews. Operating in space has never been easy, and the “better, faster, cheaper” mandate imposed by today’s overconstrained budgets has ...