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Subranging technique using superconducting technology

United States Patent

January 21, 2003
View the Complete Patent at the US Patent & Trademark Office
Subranging techniques using "digital SQUIDs" are used to design systems with large dynamic range, high resolution and large bandwidth. Analog-to-digital converters (ADCs) embodying the invention include a first SQUID based "coarse" resolution circuit and a second SQUID based "fine" resolution circuit to convert an analog input signal into "coarse" and "fine" digital signals for subsequent processing. In one embodiment, an ADC includes circuitry for supplying an analog input signal to an input coil having at least a first inductive section and a second inductive section. A first superconducting quantum interference device (SQUID) is coupled to the first inductive section and a second SQUID is coupled to the second inductive section. The first SQUID is designed to produce "coarse" (large amplitude, low resolution) output signals and the second SQUID is designed to produce "fine" (low amplitude, high resolution) output signals in response to the analog input signals.
Gupta; Deepnarayan (Hawthorne, NY)
Hypres, Inc. (Elmsford, NY)
09/ 950,993
September 13, 2001
This invention was made with government support under contract No. DE-FG02-98ER82799 from the Department Of Energy. The government has certain rights in this invention.