Demonstration of 17 GHz operation of M-code generator based on SFQ with resettable latch

Author

Akahori, Akira ; Takeuch, Nobuo ; Mori, Naoko ; Suzuki, Yasutoshi ; Furuta, Futoshi ; Fujimaki, Akira ; Hayakawa, Hisao

Author_Institution

Dept. of Quantum Eng., Nagoya Univ., Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

521

Lastpage

524

Abstract

We have experimentally demonstrated high-speed operation of a maximum code length (M-code) generator using the on-chip-testing system. M-code generator was designed by using Single Flux Quantum with Resettable Latch (SFQ-RL) proposed by us, and fabricated by the NEC standard process. The circuit operates up to 17 GHz correctly, while the bias margin decreases at higher frequencies due to the timing-related errors. This circuit based on SFQ-RL has an advantage that the initialization of the whole circuit can be realized easily. We have also confirmed the “flush” operation that the internal state is initialized simultaneously by one SFQ pulse in SFQ-RL

Keywords

flip-flops; m-sequences; superconducting logic circuits; 17 GHz; M-code generator; SFQ-RL circuit; flush operation; high-speed operation; initialization function; on-chip testing; resettable latch; single flux quantum; superconducting logic circuit; Circuits; Clocks; Digital systems; Frequency; Latches; Logic; Pipelines; Pulse generation; Strontium; Switches;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919397

Filename

919397