Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Magnetic field
Reexamination Certificate
2006-12-15
2010-10-05
Mandala, Victor A (Department: 2826)
Active solid-state devices (e.g., transistors, solid-state diode
Responsive to non-electrical signal
Magnetic field
C363S132000, C327S560000, C327S563000, C324S127000, C379S093050, C257S421000
Reexamination Certificate
active
07808062
ABSTRACT:
A signal isolator for providing at an output thereof representations of input currents from a source provided in an input conductor supported on a substrate having a bridge circuit suited for electrical connection to a source of electrical energization with a pair of series circuit members electrically connected in parallel with one another supported on a substrate with each series circuit member having a magnetoresistive member electrically connected in series with a current value controller, controlled at a controller terminal, at an output terminal of that controller. Each magnetoresistive members is electrically isolated from the input conductor and has a resistance versus applied external magnetic field characteristic that is substantially linear for at least relatively small externally applied magnetic fields. The signal isolator further has a differential input amplifier connected at its inputs to both the magnetoresistive member and the current value controller in a corresponding one of the bridge circuit series circuit members, and has outputs connected to the controller control terminals which can be made through a lowpass filter. A signal monitor arrangement can be provided to have a constant representation value on the isolator output if magnetoresistive members cease to be in those magnetic fields arising from the input currents for a selected time duration.
REFERENCES:
patent: 5569544 (1996-10-01), Daughton
patent: 6087882 (2000-07-01), Chen et al.
patent: 6252390 (2001-06-01), Black, Jr. et al.
patent: 6819169 (2004-11-01), Kunc et al.
Kinney & Lange , P.A.
Mandala Victor A
Moore Whitney
NVE Corporation
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