LIST-I LIST-II A. CMOS logic family I. highest packing density B. ECL logic family II. least static power dissipation C. TTL logic family III. highest speed of operation D. Prendo NMOS logic family IV. multiple emitter transistors are use
Choose the correct answer from the options given below:
Logic Families Matching Explained
This question requires matching different digital logic families presented in LIST-I with their defining characteristics found in LIST-II. Matching these involves understanding the fundamental features of each logic family.
Matching Logic Families to Characteristics
The correct pairings, based on standard characteristics of these logic families, are established as follows:
- A. CMOS logic family corresponds to II. least static power dissipation.
- B. ECL logic family corresponds to III. highest speed of operation.
- C. TTL logic family corresponds to IV. multiple emitter transistors are used.
- D. Prendo NMOS logic family corresponds to I. highest packing density.
Detailed Logic Family Properties
CMOS Logic and Low Static Power
The CMOS (Complementary Metal-Oxide-Semiconductor) logic family is widely recognized for its exceptionally low static power consumption. This efficiency is achieved because CMOS designs typically have a high impedance state, meaning minimal current flows when the circuit is not actively switching.
ECL Logic and High Speed
ECL (Emitter-Coupled Logic) is specifically known for achieving very high operational speeds. It utilizes current steering logic and operates faster because its transistors do not enter the saturation region, which significantly reduces switching delays.
TTL Logic and Multiple Emitters
TTL (Transistor-Transistor Logic) is a well-known logic family characterized by its use of specific components, such as the multiple emitter transistor. This design feature is integral to how TTL circuits function.
NMOS Logic and Packing Density
The question pairs the Prendo NMOS logic family with I. highest packing density. While CMOS generally offers the highest packing density in modern designs, this match highlights a specific attribute associated with this NMOS variant in the context of the question. It implies a focus on density relative to other characteristics or compared to contemporary alternatives.
Summary of Logic Family Matches
| LIST-I Entry | Logic Family | LIST-II Match | Characteristic |
|---|---|---|---|
| A | CMOS | II | Least static power dissipation |
| B | ECL | III | Highest speed of operation |
| C | TTL | IV | Multiple emitter transistors used |
| D | Prendo NMOS | I | Highest packing density |
Understanding these distinct characteristics helps differentiate between various digital logic families used in electronic design.
Important Questions from Logic Families
Which logic family is the fastest of all logic families?
Arrange the following logic families in the order of increasing speed: CMOS, low power Schottky TTL, ECL, Schottky TTL, low power TTL, TTL :
Compare the IC logic families based on their rise time in ascending order:
(A) MECL
(B) CMOS
(C) Low power schottky TTL
(D) PECL
Choose the correct answer from the options given below:
Which of the following pair is correct?
I. RTL – Saturated bipolar logic family
II. ECL – Non-Saturated bipolar logic family
In TTL family, the Totem-pole circuit on the output is used to provide _______.
