Electricity: measuring and testing – Magnetic – Magnetometers
Reexamination Certificate
2006-07-31
2008-11-18
Patidar, Jay M (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetometers
Reexamination Certificate
active
07453263
ABSTRACT:
A reference-current optimizing apparatus of a Reference Junction Double Relaxation Oscillation SQUID (RJ-DROS) with a signal SQUID and a reference junction for detecting a magnetic flux signal is provided. The reference-current optimizing apparatus includes a voltage controller for converting a digital signal into an output voltage; a buffer for receiving the output voltage and preventing a current generated in the RJ-DROS from flowing inversely into the reference-current optimizing apparatus; a low-pass filter for eliminating a noise mixed in an output voltage of the buffer; and a resistor for converting an output voltage of the low-pass filter into a current and providing both ends of the reference junction with the current. The reference-current optimizing apparatus may also include a preamplifier having a number of junction bipolar transistors.
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Kim Jin-Mok
Kim Kiwoong
Kwon Hyukchan
Lee Yong-Ho
Korea Research Institute of Standards and Science
Patidar Jay M
The Webb Law Firm
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