Biasing and fast degaussing circuit for magnetic materials
Abstract
A dual-function circuit is provided which is used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit is magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a dc current and alternately apply a selectively damped ac current to the device to degauss the device. The circuit is of particular value in many systems which use magnetostrictive transducers for ultrasonic transmission in different propagation modes over very short time periods.
- Publication:
-
Patent Application Department of Energy
- Pub Date:
- October 1983
- Bibcode:
- 1983doe..reptQ....D
- Keywords:
-
- Circuits;
- Demagnetization;
- Loads (Forces);
- Magnetic Materials;
- Ultrasonics;
- Magnetostriction;
- Patent Applications;
- Polarization (Waves);
- Transducers;
- Physics (General)