Transistor–transistor logic (TTL) is a class of digital circuits built from ____________(a) JFET only(b) Bipolar junction transistors (BJT)(c) Resistors(d) Bipolar junction transistors (BJT) and resistorsI had been asked this question in final exam.My question comes from Transistor Transistor Logic(TTL) topic in division Logic Families of Digital Circuits

Transistor–transistor logic (TTL) is a class of digital circuits bui

1.	Transistor–transistor logic (TTL) is a class of digital circuits built from ____________(a) JFET only(b) Bipolar junction transistors (BJT)(c) Resistors(d) Bipolar junction transistors (BJT) and resistorsI had been asked this question in final exam.My question comes from Transistor Transistor Logic(TTL) topic in division Logic Families of Digital Circuits
Answer» Correct answer is (d) Bipolar junction transistors (BJT) and RESISTORS The best EXPLANATION: Transistor–transistor logic (TTL) is a class of DIGITAL circuits built from bipolar junction transistors (BJT) and resistors. However, resistors have a small role to play and both logic gating and amplifying functions are PERFORMED by the transistors.

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