Feedback is very large subject, and I am going to limit myself to some simple tutorial comments and a discussion of phenomena associated with complexity in distortion created by nonlinear gain stages, negative feedback, and the audio signal. Taken singly, these phenomena seem simple enough, but when they interact, they create distortions out of proportion to what you expect from the specifications found in product brochures. There are linear and non-linear forms of distortion. Linear distortions affect the amplitude and phase of audio signals, but don't show up on harmonic distortion analyzers as added frequency components that weren't there in the first place. Tone controls are a good example of circuits with linear distortion. Nonlinear distortions are those which add new frequency components to the original signal, either as harmonic multiples of the original frequencies or as sidebands resulting from their non-linear interaction between the original frequencies. Nonlinearities are often deliberately created in musical instruments themselves, but they are unwanted in music reproduction. We will be talking about nonlinear distortions.
Hundreds of New Product announcements from CES 2009
Every year for the last 20 years, I have been making the trek up to Las Vegas for the annual Consumer Electronics Show. Over the years, the show has evolved from a giant bazaar selling toys, watches and other household gizmos to the most important United States show for electronics, cameras, computers, gaming, audio accessories, etc. This year is no different. So far I have not seen any revolutionary announcements but several trends are definitely emerging.
We don't agree that this year's CES attendance was an indicator of an industry decline. The lower numbers were good for a lot of reasons. Unfortunately when the economic tide turns the hordes will probably be back. 3D movies/TV, mininotebooks and the constant din that we need our entertainment everywhere were the major news points for the show. Beyond that there were incremental enhancements/improvements. Paradigm shifts were not to be seen. But as CEA's Shapiro said it may be tough for a few quarters but the industry is going to innovate itself out of the global economic downturn. Flying to the seat of national government for handouts is not in the companies' DNA. Surviving and thriving in the PC/CE/content industry isn't always easy, sometimes not much fun but it is always interesting. This is one of those really, really interesting periods.
Hundreds of New Product announcements from Integrated Systems Europe 2009
With a single, universal RF remote device, consumers will be able to control every aspect of their connected home. RF is engineered to control more than a TV and DVD, it can also control lighting, heating and air conditioning, blinds and shutters. Two-way communication can also be used to help you locate your lost remote control hidden in the couch pillows or under the table. This new generation of RF communication is opening up a market for low cost, reliable high speed RF remote controls and is expected to have a huge impact on the user experience, as IEEE 802.15.4 remote controls will allow a completely new way to use a remote control. In short, the development of radio frequency remote controls will replace IR remote controls and deliver richer communications, increase reliability and improve flexibility
Despite what a lot of "financial experts" say (weren't they the ones who got us into this position?) things aren't real bad -- yeah they're not real great either. But people in the business/consumer computer/entertainment/communications industry have never been short on optomism or ideas. Looking up from what is near the bottom of the valley it is fairly obvious that it will be a long, hard trek back up to the top of the hill. Some firms won't survive by this time next year. Those that focus on developing a strong consumer centric strategy and lead/listen to the marketplace will be light years ahead of the competition when we enter 2010. What's it going to take? What will the the leaders do? We've got a pretty good idea...hope you agree. We know most have what it takes to survive and prosper!
Ten years ago, the "smart home" was all the rage. Almost every company in our market had a concept center or display house that showed the functionality of the digital home.
Sophisticated Packaging Service Takes the Guesswork Out of Installation Jobs, Speeding Completion and Reducing Errors
Solution-Rich, Reference-Level Guide Delivers Thousands of Products for Residential and Commercial A/V Professionals in Easier-Than-Ever Format
Because audiophiles require perfect sounding music, Moondog Digital has announced the most complete and thorough CD conversion process available today. Moondog Digital's ArchiveRip packages are targeted at the most demanding music collector.
The VIOSO GmbH makes extraordinary projection easy and affordable for end user.
Advanced Loudspeaker Engineering Brings the Benefits of Controlled Dispersion to Low-Frequencies
ELAN® Launches Groundbreaking Elios™ Architectural and Cinema Speaker Line Engineered to Meet the Highest Expectations of Listeners and Custom Installers Alike
Extensive New Line Features Exclusive, Patent-Pending Nano-Tech Tweeter Design and Innovative Installation Solutions for the Custom Installer
HAI Adds to Philips ProntoScript Module Library with New Versions of Pronto Link in Italian and French
HAI has announced Pronto Link is now available in Italian and French language versions as a free download.
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Automation & Control - Featured Product
INTRODUCING THE SIMPLEST WAY TO CONTROL YOUR ENTIRE HOUSE YOUR VOICE. Imagine this... We've all been there-walking through the door into a dark house, arms full. Wouldn't it be nice to tell your house to offer a helping hand? Now you can. A simple voice command-such as "Alexa, turn on Welcome"-lights up the hallway and kitchen, fires up your favorite Pandora station, while the door locks itself behind you. This is Control4 Home Automation with Amazon Alexa.