Question

Diode–transistor logic (DTL) is the direct ancestor of _____________

(a) Register-transistor logic

(b) Transistor–transistor logic

(c) High threshold logic

(d) Emitter Coupled Logic

The question was posed to me in an online quiz.

I would like to ask this question from Diode-Transistor Logic(DTL) topic in section Logic Families of Digital Circuits

Answer 1

Correct choice is (b) Transistor–transistor logic

The best I can explain: Diode–transistor logic (DTL) is a class of digital circuits that is the direct ancestor of transistor–transistor logic. To overcome the shortcomings of DTL, TTL came into existence.