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direct coupled transistor logic (DCTL)

DCTL logics, Direct Coupled TransistorLogic (DCTL), consist of bipolar transistors directly coupled together. In these first logic circuits, there were only resistors

inaddition to the directly coupled transistors.

NAND gates in direct coupled transistor logic (DCTL)

NAND gates in direct coupled transistor logic (DCTL)

In DCTL logics, the bases are directly connected to the inputs without an intermediate base resistor. Without this resistor, DCTL logics are simpler to build and easier to fabricate than RTL logics, which have a base resistor.

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Englisch: direct coupled transistor logic - DCTL
Updated at: 11.04.2019
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