Toshiba's amorphous noise
suppression devices, AMOBEADS®
and SPIKE KILLER®, suppress rapid
changes in current which could otherwise lead to electrical noise in many
circuits. Unlike other noise reduction methods which absorb noise after it is
created, amorphous noise suppression devices suppress the source of the noise.
Because of their square-shaped magnetic hysteresis behavior, amorphous noise
suppression devices have a very large inductance when the current crosses zero
(i.e. changes sign). This large inductance effectively blocks any further
current changes. During normal current flow amorphous noise suppression devices
have very low inductance. The reverse recovery phenomenon in semiconductor
switching devices occurs when the current switches off. This phenomenon can
lead to noise in the circuit. Amorphous noise suppression devices effectively
and efficiently decrease the noise caused by the reverse recovery current.