BULK EFFECT OSCILLATORS FOR FREQUENCY CONTROL.
Abstract
A careful study of the previously reported phenomena of oscillation attributed to electrostriction was undertaken. Measurements made of bulk semiconductor electrostriction (one dimensional current flow) as distinguished from those made earlier with a point contact technique have failed to demonstrate the large values of electrostriction previously reported. The experimental observations appear to be dominated by thermal effects. A theoretical model for the effect has been developed. Because of its dependence on current, it is designated by the term current-striction. The predicted value of the current-striction constant for 10 ohm-cm germanium is 1.1 x 10 to the minus 15th power cm squared/V squared, about four orders of magnitude smaller than previously reported on the basis of point contact measurements. Attempts to use plated small area contacts to replace the previous point contact (and its associated pressure) have only been partly successful because of the difficulty of obtaining a durable contact. With such contacts oscillation has been obtained only with the application of pressure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0822648
Entities
People
- Edgar J. Denlinger
- Philipp Kornreich
- William W. Cowles
Organizations
- Moore School of Electrical Engineering