LIST-I LIST-II A. Emitter Coupled Transistor pair I. TTL logic family B. Multiple emitter BJT II. CMOS logic family C. Rail-to-rail output swing III. Pass transistor logic D. Most efficient implementation of XOR function IV. ECL logic family
Matching Logic Families and Features
This question requires matching specific digital logic families and circuit features based on their characteristics.
Identifying Logic Family Matches
We analyze each item in LIST-I and match it with the most appropriate item from LIST-II:
- A. Emitter Coupled Transistor pair: This configuration is the fundamental basis for ECL (Emitter-Coupled Logic) family, known for high speed. Thus, A matches with IV. ECL logic family.
- B. Multiple emitter BJT: The use of a multiple emitter Bipolar Junction Transistor (BJT) is a hallmark of the TTL (Transistor-Transistor Logic) family. Thus, B matches with I. TTL logic family.
- C. Rail-to-rail output swing: Achieving an output voltage swing that spans nearly the entire power supply range (from VCC to GND) is a significant advantage of CMOS (Complementary Metal-Oxide-Semiconductor) logic. Thus, C matches with II. CMOS logic family.
- D. Most efficient XOR implementation: While various logic families can implement XOR, Pass Transistor Logic is often highlighted for its efficiency, particularly in reducing transistor count for XOR gates compared to standard implementations in other families. Thus, D matches with III. Pass transistor logic.
Summary of Correct Matches
The correct pairings derived are:
- A - IV
- B - I
- C - II
- D - III
This combination corresponds to Option C.
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 _______.
