Question

What is the disadvantage of MOS capacitor in DRAM?

(a) It can’t hold the data till a long period

(b) It doesn’t holds the charge till a long period

(c) It is highly densed

(d) It is not flexible

The question was posed to me by my school teacher while I was bunking the class.

My doubt is from Random Access Memory topic in portion Memory Devices of Digital Circuits

Answer 1

The correct answer is (b) It doesn’t holds the charge till a long period

For explanation: The disadvantage of MOS capacitor in DRAM is that it can’t hold the stored charge over a long period of time and it has to be refreshed every few millisecond. Thus, DRAM is slow in operation.