Superconducting analog-to-digital converter with grounded four-junction SQUID bidirectional counter

Patent · Tue May 28 04:00:00 EDT 1991

OSTI ID:5091213

Lee, G S

This paper describes a superconducting counting analog-to-digital converter. It comprises: a superconducting quantum interference device (SQUID) quantizer; means for applying a varying analog signal to the SQUID quantizer; and a bidirectional binary counter having a plurality of stages of grounded four-junction SQUID flip-flops connected together in a cascade arrangement from the least significant bit (LOB) to the most significant bit (MSB); wherein the quantizer generated up-count and down-count voltage pulses for increasing and decreasing values of the analog signal and the bidirectional binary counter algebraically counts the voltage pulses, increasing the binary count when up-count pulses are received and decreasing the binary count when down-count pulses are received.

• Assignee: TRW Inc., Redondo Beach, CA (USA)
• Patent Number(s): A; US 5019818
• Application Number: PPN: US 7-397923
• OSTI ID: 5091213
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANALOG-TO-DIGITAL CONVERTERS
COUNTING CIRCUITS
ELECTRIC POTENTIAL
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FLIP-FLOP CIRCUITS
FLUXMETERS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MULTIVIBRATORS
PULSE CIRCUITS
SQUID DEVICES
SUPERCONDUCTING DEVICES