Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-11-30
1992-02-18
Hudspeth, David
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, 307455, 307246, 307270, H03K 19013
Patent
active
050897241
ABSTRACT:
High-speed low-power emitter coupled logic (ECL) and non-threshold logic (NTL) circuits are disclosed wherein an ac-coupled complementary push-pull output stage is utilized. The circuits utilize two capacitors to couple an ac-pulse derived from a replica of an input signal to the bases of the complementary PNP-NPN push-pull transistors to provide a large transient current, thus realizing high-speed operation with very low dc power dissipation. The coupling scheme allows a very low switch current to be used for the logic (current switch) stage to maintain the proper logic levels while avoiding the impact on the switching speed by the large pull-up resistors of the logic stage.
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Usami, M., et al., "SPL (Super Push-Pull Logic) A Bipolar Novel Low-Power High-Speed Logic Circuit", Dig. of Tech. Papers, Symp. on VLSI Circs., pp. 11-12 (May 1989).
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Chuang Ching-Te K.
Tang Denny D.
Hudspeth David
International Business Machines - Corporation
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