Northrop Grumman Cryogenic Electronics: 
Superconducting and Hybrid Digital Circuits

• Analog to Digital Converters
• Flux Quantum Sigma-Delta Analog-to-Digital Converters for rf Signals
• Superconducting Modulators for high dynamic range delta-sigma ADCs
• High-Linearity Sigma-Delta A/D Converters
• Multilayer HTS Counting A/D Converter
• Review article on Superconducting Analog to Digital Converters
• Communications Circuits
• Modulation and Demodulation of 2 GHz Pseudo Random Binary Sequence using SFQ digital circuits
• Multi-Gigahertz, Low Bit Error Rate, Pseudo-Random Code Generator for use in a spread spectrum satellite communications link
• Pseudorandom Bit Sequence Generator
• Measurement of Bit Error Rates in SFQ Circuits
• Interface Circuits
• Dewar-to-Dewar Data Transfer at 2 Gigabits per Second
• Circuits for chip-to-chip transportation of bits from single flux quantum circuits using: Latching and Non-Latching junctions
• Single-Flux-Quantum Demultiplexer
• Interface Circuits for Input and Output of Gigabit/sec Data
• High Speed Data Switches
• Single flux quantum Circuits for 2.5 Gbps Data Switching
• Single Flux Quantum Cross-Bar Switch and Demultiplexer
• Shift Registers
• Demonstration of the first high tc single-flux-quantum (SFQ)

integrated digital circuit: Shift Register Operated at 65K
• SFQ Circuits Based on YBCO Step-Edge-Grain-Boundary Junctions
• 4.6 GHz SFQ Shift Register

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