Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-04-18
1987-08-18
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, 307454, 307455, 307254, H03K 19086, H03K 1704, H03K 1901, H03K 19013
Patent
active
046879536
ABSTRACT:
A dynamic ECL line driver circuit for driving line loads having significant capacitance which includes an input transistor, a reference transistor, a main current source transistor and an emitter follower transistor. The line driver circuit further includes a dynamic current enhancement circuit formed of a buffer portion, a current enhancement portion and a dynamic charge pumping portion. The current enhancement portion includes a current source enhancement transistor and the dynamic charge pumping portion includes a capacitor. The buffer portion is utilized for amplifying and inverting a transient voltage at the collector of the reference transistor. One end of the capacitor is connected to the collector of the reference transistor and the base of the emitter follower transistor, and the other end thereof is coupled to the base of the current source enhancement transistor via the buffer portion. As logic transitions occur at the base of the emitter follower transistor, the transient voltage is impressed upon the base of the current source enhancement transistor so as to speed up the transitions on an output terminal.
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Advanced Micro Devices , Inc.
Chin Davis
Duong Tai
King Patrick T.
Miller Stanley D.
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