Question

The way to speed up DTL is to add an across intermediate resister is ___________

(a) Small “speed-up” capacitor

(b) Large “speed-up” capacitor

(c) Small “speed-up” transistor

(d) Large ” speed-up” transistor

I got this question in an internship interview.

Question is from Diode-Transistor Logic(DTL) topic in chapter Logic Families of Digital Circuits

Answer 1

Right option is (a) Small “speed-up” capacitor

To elaborate: One way to speed up DTL is to add a small “speed-up” capacitor across intermediate resister. The capacitor helps to turn off the transistor by removing the stored base charge; the capacitor also helps to turn on the transistor by increasing the initial base drive.