Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1987-10-02
1988-05-31
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307455, 307318, 307362, H03K 19086, H03K 1920
Patent
active
047483504
ABSTRACT:
An emitter-coupled logic (ECL) circuit having a pull-down resistor and including a breakdown protecting structure. Such breakdown occurs in an input transistor for receiving input data when an excess reverse voltage is applied across the emitter and base of the input transistor. The breakdown protection structure preferably includes a constant-voltage regulating device which can always clamp the level of a reference voltage V.sub.BB to a suitable level higher than a low voltage V.sub.EE of a power source by the value of a constant voltage. The reference voltage V.sub.BB is usually applied to the base of another transistor which should be coupled, at respective emitters, with the input transistor by the representative emitters.
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Callahan Timothy P.
Fujitsu Limited
Miller Stanley D.
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