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Vishay Releases New Technical Guides on Bulk Metal® Foil Resistors for Audio Noise Reduction and for Military/Aerospace Applications
Malvern, Pa. — January 18, 2006 — Vishay Intertechnology, Inc. (NYSE: VSH) announces that it has released two new brochures on ultra-high-precision Bulk Metal® foil resistors. One brochure, titled Audio Noise Reduction Through the Use of Bulk Metal ® Foil Resistors, explains how to select resistors for low-noise audio applications. The other brochure, titled High-Precision Bulk Metal ® Foil Resistors for Military and Aerospace Applications, provides technical data on Vishay’s extensive portfolio of foil resistors.
Invented by Dr. Felix Zandman in 1962, Bulk Metal foil resistors were (together with foil resistance strain gages), the first products manufactured and marketed by Vishay. Over the years, as Vishay has grown from the start-up company founded by Dr. Zandman to become one of the world's largest manufacturers of discrete semiconductors and passive electronic components, Dr. Zandman — now Chairman of the Board, Chief Technical Officer, and Chief Business Development Officer — has spearheaded an ongoing series of improvements to the original Bulk Metal foil resistor product line. These improvements include Z Foil, which provides an absolute temperature coefficient of resistance (TCR) of 0.2 ppm/°C.
Audio Noise Reduction Through the Use of Bulk Metal ® Foil Resistors is designed to help educate circuit design engineers and others who need to select resistors for audio applications. The brochure describes noise generation within the various available types of resistors (foil, wirewound, metal film, and carbon) and quantifies the noise insertion to expect from each type. The brochure explains the two kinds of relevant noise: thermal noise (caused by the random motion of electrons within the resistive conductor) and current noise (the bunching and releasing of electrons associated with current flow). The brochure highlights the fact that signal purity in audio applications can be a function of the selection of resistor technology for pre-amp, amplifier, and volume control applications. Bulk Metal foil resistors, because of their unique characteristics, provide the best performance for low-noise audio applications
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Audio Noise Reduction Through the Use of Bulk Metal ® Foil Resistors is available on the Vishay Web site at /doc?49435.
High-Precision Bulk Metal ® Foil Resistors for Military and Aerospace Applications is designed for circuit design engineers and others who need to select resistors for use in military and aerospace equipment and systems. Bulk metal foil resistors are specially designed to function reliably when subjected to extremely hot and cold temperatures, intense vibration, extreme humidity, and other environmental stresses associated with military and aerospace equipment and systems. High-Precision Bulk Metal® Foil Resistors for Military and Aerospace Applications features tables that list each type of discrete foil resistor and foil resistor network, identify the MIL spec for which it is tested, and describes its performance in terms of temperature coefficient of resistance (TCR), power coefficient (PCR), resistance range, tolerance, and other key parameters.
High-Precision Bulk Metal ® Foil Resistors for Military and Aerospace Applications is available on the Vishay Web site at /doc?49433.
To obtain printed copies of either brochure, please contact the appropriate Vishay literature distribution center listed below. Please include order number VMN-PL0013-0510 with your request for Audio Noise Reduction Through the Use of Bulk Metal ® Foil Resistors. Please include order number VMN-PL0006-0509 with your request for High-Precision Bulk Metal ® Foil Resistors for Military and Aerospace Application.
The Americas
Fax: +1-402-563-6569
literature.americas@vishay.com

Europe and Israel
Fax: +49 71 31 67 2423
literature.europe@vishay.com

Asia
Fax: +49 71 31 67 2423
literature.asia@vishay.com
More information on Vishay Bulk Metal foil resistors is available at on the Vishay Web site at http://www.vishay.com/resistors-discrete/ultra-high-precision (for discrete resistors) and at http://www.vishay.com/resistor-networks/metal-foil (for resistor networks).
For technical support, please contact Foil@Vishay.com.
Vishay Precision Group Inc. has ceased to be a subsidiary of Vishay Intertechnology Inc. and is an independent publicly owned company.