Title :
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
fDate :
3/1/2001 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
