ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The output of relaxation oscillation superconducting quantum interference devices (ROSs) consists of a sequence of voltage pulses with a frequency that depends on the flux that is applied to the ROS. In this paper, a theoretical model for the flux-to-frequency conversion of a ROS is presented, and this model is validated in practice for oscillation frequencies up to 7 GHz. The experiments have been performed on more than ten different ROSs and the model was able to fit all measured data, which illustrates the versatility of the model. Furthermore, a simple flux locked loop based on frequency readout of a ROS in the GHz regime is presented. The measured flux noise, (square root of)SΦ=2.5μΦ0/(square root of)Hz, corresponding to an energy resolution ε≈600h, is probably not intrinsic to the ROSs, but due to the readout electronics. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.363289
