What is a PLA?

Correct option is B

A Programmable Logic Array (PLA) is a type of programmable logic device (PLD) that is used to implement combinational logic circuits. It consists of a programmable AND array and a programmable OR array, which allows for the implementation of multiple Boolean functions. Hence, the correct answer is "Programmable Logic Array."
Important Key Points:
1. PLA Structure: A PLA consists of two programmable logic blocks – an AND array and an OR array – which allow it to implement multiple logic functions.
2. Functionality: It can be used to implement complex Boolean expressions, making it highly useful in custom digital circuit design.
3. PLD Types: PLAs belong to a broader category called Programmable Logic Devices (PLDs), which also includes Programmable Array Logic (PAL) and Field-Programmable Gate Arrays (FPGAs).
4. PLA vs. PAL:
· PLA has both programmable AND & OR arrays, making it more flexible.
· PAL has a programmable AND array but a fixed OR array, making it simpler and faster.
5. Applications: PLAs are used in digital logic design, custom microprocessor control units and combinational circuit implementation.
Knowledge Booster:
· PLA can implement multiple logic functions within a single device, reducing the need for separate logic gates.
· PLA is widely used in digital circuit design, such as in microprocessors, memory controllers and state machines.
· Compared to ROM-based logic design, a PLA is more flexible and efficient when designing specific logic circuits.
· FPGAs are an advanced form of programmable logic devices that allow reconfiguration after manufacturing.
· PLAs are used in applications where reprogrammable logic is needed, making them highly useful for prototyping and circuit optimization.