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TTL is a ____________(a) Current sinking(b) Current sourcing(c) Voltage sinking(d) Voltage sourcingThis question was posed to me by my college director while I was bunking the class.The question is from Transistor Transistor Logic(TTL) topic in section Logic Families of Digital Circuits

Answer»

Right answer is (a) Current sinking

To explain: Like DTL, TTL is a current-sinking LOGIC since a current must be drawn from INPUTS to bring them to a logic 0 level. Current SINK means it ACCEPTS current coming out from a source.



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