Jpn. J. Appl. Phys. 30 (1991) pp. 3920-3924 |Next Article| |Table of Contents|
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Experimental and Simulation Study of an Auxiliary Circuit to Improve Gain of the Quantum Flux Parametron
ERATO, Research Development Corporation of Japan (JRDC), 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185
1Central Research Lab., Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185
(Received September 5, 1991; accepted for publication October 19, 1991)
The gain of parametron-type devices like the Quantum Flux Parametron (QFP) is reduced by non-uniformity which causes an apparent input bias. A method to improve gain by circuit design is considered. A booster, a dc-activated QFP attached to the output of a clock-activated QFP, improves gain by doubling total output current without significantly increasing minimum input current. The booster's operation is analyzed theoretically from its quasi-static behavior and compared to results obtained from low-speed experiments on fabricated test circuits and computer simulations at high-clock rates.
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