Biasing and fast degaussing circuit for magnetic materials

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865161

McNeilly, David R ^[1]

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1. Maryville, TN

A dual-function circuit is provided which may be used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit may be magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a d.c. current and alternately apply a selectively damped a.c. 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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4471403
• OSTI ID: 865161
• Country of Publication: United States
• Language: English

Related Subjects

biasing
fast
degaussing
circuit
magnetic
materials
dual-function
provided
magnetically
bias
alternately
quickly
degauss
device
coupled
directly
connected
electrically
magnetostrictive
transducer
applying
current
apply
selectively
damped
particular
value
systems
transducers
ultrasonic
transmission
propagation
modes
time
periods
magnetic materials
propagation mode
time period
magnetic material
magnetically coupled
directly connected
time periods
connected electrically
particular value
ultrasonic transmission
magnetostrictive transducers
magnetically bias
magnetostrictive transducer
magnetic device
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