Interface circuit using JTLs as control lines of SQUID array

Author

Tarutani, Yoshinobu ; Saitoh, Kazuo ; Takagi, Kazumasa

Author_Institution

Adv. Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

341

Lastpage

344

Abstract

Interface circuits for the RSFQ circuit system were designed, fabricated and their frequency characteristics were investigated. Key elements of the interface circuit were the series array of SQUIDs and a JTL as a control line of the SQUID. The interface circuit was designed to cover the operating frequencies much greater than 10 GHz. A high-frequency signal generator circuit consisting of a ring oscillator, a frequency divider, and an interface circuit was fabricated. High frequency signals produced in the ring oscillator could be detected by using the interface circuit. The h/2e relationship between the oscillation frequency and the ac Josephson voltage was verified

Keywords

SQUIDs; superconducting arrays; superconducting transmission lines; 10 GHz; Josephson transmission line; RSFQ circuit; SQUID series array; control line; frequency divider; high-frequency signal generator; interface circuit; ring oscillator; voltage amplifier; Circuit simulation; Frequency; Helium; Inductance; Inductors; Laboratories; Numerical simulation; SQUIDs; Switches; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919352

Filename

919352