Flux-bias stabilization scheme for a radio-frequency amplifier based on a superconducting quantum interference device

Authors
Muck, M Clarke, J
Citation
M. Muck et J. Clarke, Flux-bias stabilization scheme for a radio-frequency amplifier based on a superconducting quantum interference device, REV SCI INS, 72(9), 2001, pp. 3691-3693
Citations number
8
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
REVIEW OF SCIENTIFIC INSTRUMENTS
ISSN journal
00346748 → ACNP
Volume
72
Issue
9
Year of publication
2001
Pages
3691 - 3693
Database
ISI
SICI code
0034-6748(200109)72:9<3691:FSSFAR>2.0.ZU;2-3
Abstract
A magnetic flux stabilization scheme involving a low-frequency flux-locked loop has been developed to regulate the gain of a radio-frequency amplifier based on a superconducting quantum inteference device (SQUID). The flux-lo cked loop largely eliminates drifts in the gain arising from drifts in the flux bias. Tests on a microstrip SQUID amplifier operating at 777 MHz insid e a superconducting shield show that the peak-to-peak drift in the gain is no more than 0.3 dB/day. (C) 2001 American Institute of Physics.