@article{oai:ynu.repo.nii.ac.jp:00009691,
 author = {Yamanashi, Yuki and Nakaishi, Sotaro and Yoshikawa, Nobuyuki},
 issue = {5},
 journal = {IEEE Transactions on Applied Superconductivity},
 month = {Aug},
 note = {We designed several single flux quantum (SFQ) flip-flops and logic gates composed of Josephson junctions (JJs) and π-shifted JJs (π-JJs) to quantitatively evaluate effectiveness of intro-duction of π-JJs into the SFQ logic circuit. One-output flip-flops and logic gates were designed on the basis of the circuit design methodology we built for the SFQ circuit containing π-JJs. The de-signed flip-flops and logic gates have wide operating margins, the dc bias margins of larger than ±30% and device parameter mar-gins of ±18%, though the static power consumption are reduced compared to conventional ones composed of JJs. We found that the difference in the critical current density between JJs and π-JJs does not affect the operating margins of the SFQ flip-flop com-posed of JJs and π-JJs. We devised a circuit structure of the delay flip-flop with complementary outputs composed of JJs and π-JJs (π-DFFC). The analog circuit simulation shows the dc-bias margin of the π-DFFC is larger than ±33%. These results indicate that the large-scale SFQ logic circuit system can be implemented using the flip-flops and logic gates containing π-JJs.},
 title = {Simulation of the Margins in Single Flux Quantum Circuits Containing π-Shifted Josephson Junctions},
 volume = {29},
 year = {2019}
}