Applications of the superconducting vortex-flow transistor
Thesis/Dissertation
·
OSTI ID:7003578
This thesis is concerned with the application of the superconducting vortex-flow transistor (VFT) in high-frequency amplifiers. A simple analytical model for the VFT is presented. The validity of this model is tested with computer simulations. A small-signal equivalent circuit for the VFT is also presented. Because of the low impedance levels and low power levels of the VFT, a distributed-amplifier structure is introduced that solves these problems. Simple design guidelines for the distributed amplifier are discussed, and the validity of these guidelines is demonstrated with a computer simulation. Next, the VFT circuit characteristics are investigated, and their optimization with the distributed-amplifier application goal in mind is discussed. The experimental investigation of the DC properties of the VFT has led to the development of a new VFT design that features a shortened control line. This design maximizes the transresistance while minimizing the output resistance, feed through capacitance, and input inductance of the VFT. The high-frequency properties of the transresistance and feed through capacitance of the VFT are reported. A distributed amplifier design based on the experimental measurements is presented. This design predicts that a VFT distributed amplifier could be built that would provide 8 dB of useful gain into a 5-ohm load to frequencies near 100 GHz.
- Research Organization:
- Wisconsin Univ., Madison (USA)
- OSTI ID:
- 7003578
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Related Subjects
42 ENGINEERING
420201* -- Engineering-- Cryogenic Equipment & Devices
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
COMPUTERIZED SIMULATION
DESIGN
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
EQUIVALENT CIRCUITS
FLUID FLOW
FUNCTIONAL MODELS
HIGH FREQUENCY AMPLIFIERS
SEMICONDUCTOR DEVICES
SIMULATION
SUPERCONDUCTING DEVICES
TRANSISTORS
VORTEX FLOW
420201* -- Engineering-- Cryogenic Equipment & Devices
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
COMPUTERIZED SIMULATION
DESIGN
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
EQUIVALENT CIRCUITS
FLUID FLOW
FUNCTIONAL MODELS
HIGH FREQUENCY AMPLIFIERS
SEMICONDUCTOR DEVICES
SIMULATION
SUPERCONDUCTING DEVICES
TRANSISTORS
VORTEX FLOW