Browse Prior Art Database

SHIELDED COIL WITH REDUCED MICROPHONIC SUSCEPTIBILITY

IP.com Disclosure Number: IPCOM000006888D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-08
Document File: 1 page(s) / 55K

Publishing Venue

Motorola

Related People

Authors:
John W. Chapman

Abstract

In the design of VHF and UHF oscillators the com- ponent of choice for creating an inductive element is often a shielded, tunable coil. While this component offers a number of advantages to the designer it also has some disadvantages, one of which is a propensity to change reactance in the presence of physical perturbations. This effect is usually referred to as microphonism and has typically been associated with movements of the entire shielded coil or movement of the coil within the shield.