Design of superconducting single flux quantum decimation filters

Author

Hasegawa, Haruhiro ; Hashimoto, Tatsunori ; Nagasawa, Shuichi ; Suzuki, Hideo ; Miyahara, Kazunori ; Enomoto, Youichi

Author_Institution

Superconductivity Res. Lab., Int. Superconductivity Technol. Center, Tokyo, Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

517

Lastpage

520

Abstract

A third-order sine decimation filter was designed for a Σ-Δ A/D converter with a second-order modulator. The sine filter was formed from multistage decimation structure, which was constructed from the cascade connection of third-order sine filters with a decimation factor of 2. A counter, consisting of single-flux-quantum (SFQ) toggle flip-flops (TFF) with destructive readout, was used to reduce the circuit scale. The sine filter with a decimation factor of 2, which is the circuit that operates at the highest frequency in a multistage decimation structure, operated up to the clock frequency of 18 GHz in a circuit simulation. A sine filter with a decimation factor of 32 was calculated to require 6700 Josephson junctions that consume 1.9 mW

Keywords

flip-flops; sigma-delta modulation; superconducting filters; superconducting integrated circuits; 1.9 mW; 18 GHz; Josephson junction; circuit simulation; counter; decimation filter; destructive readout; sigma-delta analogue-digital converter; sine filter; superconducting single flux quantum toggle flip-flop; Circuit simulation; Clocks; Counting circuits; Flip-flops; Frequency; Niobium; Signal processing; Superconducting filters; Superconductivity; Transfer functions;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919396

Filename

919396