Uploaded February 2024 | Updated September 2026, 3 weeks ago
In this video, the basic Architecture of Programmable Array Logic (PAL) has been covered. And through example, how to implement any logic circuit using the PAL is also explained.
The following topics are covered in the video:
0:00 What is PAL? Basic Architecture of PAL
5:52 Solved Example (Implementation of Logic Circuit using PAL)
13:42 Output macrocell in PAL
Programming Array Logic:
The PAL is one type of programmable logic device. In PAL, the AND gate array is programmable while the OR gate array is fixed. (The number of AND gates that can be connected with the OR gate is fixed).
In some PAL outputs, there is feedback from the output to the input side.
By reusing the output of the OR gate (by providing feedback to the input side), it is possible to reuse the product terms that is generated by the OR gate. And in this way, it is possible to implement a Boolean function with more product terms.
Apart from a programmable AND gate array and fixed OR gate array, the PAL also consists of output logic blocks/output macrocells. By configuring the output macrocell, it is possible to provide various output functionality in PAL.
In this video, the basic architecture of PAL, and the internal circuit of the output macrocell are explained in detail.
This video will be helpful to all the students of science and engineering in understanding the basic architecture of PAL and for learning how to implement a logic circuit using PAL.
The link for the other useful videos related to programmable logic devices:
1) Programmable ROM:
youtu.be/zpYSia8vQNs
2) Programmable Logic Array:
youtu.be/UJ8FCjPpS4E
3) RAM explained:
youtu.be/a--rNdqtwCI
4) ROM explained:
youtu.be/1GREaNW21XM
5) CPLD Explained:
youtu.be/LbszOAzYWx8
For more videos on Digital Electronics, check this playlist:
youtube.com/playlist?list=PLwjK_iyK4LLBC_so3odA64E2MLgIRKafl
The videos related to K-map:
1) 2-variable and 3-variable K-map:
youtu.be/lw1STgKUpW0?si=XkJkBnDX4UUoRrOM
2) 4-variable K-map:
youtu.be/v08rGyVYaII?si=5waNBYQpYS2P8b1V
#allaboutelectronics
#digitalelectronics
#ProgrammableArrayLogic
#PAL
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Music Credit: bensound.com
In this video, the basic Architecture of Programmable Array Logic (PAL) has been covered. And through example, how to implement any logic circuit using the PAL is also explained.
The following topics are covered in the video:
0:00 What is PAL? Basic Architecture of PAL
5:52 Solved Example (Implementation of Logic Circuit using PAL)
13:42 Output macrocell in PAL
Programming Array Logic:
The PAL is one type of programmable logic device. In PAL, the AND gate array is programmable while the OR gate array is fixed. (The number of AND gates that can be connected with the OR gate is fixed).
In some PAL outputs, there is feedback from the output to the input side.
By reusing the output of the OR gate (by providing feedback to the input side), it is possible to reuse the product terms that is generated by the OR gate. And in this way, it is possible to implement a Boolean function with more product terms.
Apart from a programmable AND gate array and fixed OR gate array, the PAL also consists of output logic blocks/output macrocells. By configuring the output macrocell, it is possible to provide various output functionality in PAL.
In this video, the basic architecture of PAL, and the internal circuit of the output macrocell are explained in detail.
This video will be helpful to all the students of science and engineering in understanding the basic architecture of PAL and for learning how to implement a logic circuit using PAL.
The link for the other useful videos related to programmable logic devices:
1) Programmable ROM:
youtu.be/zpYSia8vQNs
2) Programmable Logic Array:
youtu.be/UJ8FCjPpS4E
3) RAM explained:
youtu.be/a--rNdqtwCI
4) ROM explained:
youtu.be/1GREaNW21XM
5) CPLD Explained:
youtu.be/LbszOAzYWx8
For more videos on Digital Electronics, check this playlist:
youtube.com/playlist?list=PLwjK_iyK4LLBC_so3odA64E2MLgIRKafl
The videos related to K-map:
1) 2-variable and 3-variable K-map:
youtu.be/lw1STgKUpW0?si=XkJkBnDX4UUoRrOM
2) 4-variable K-map:
youtu.be/v08rGyVYaII?si=5waNBYQpYS2P8b1V
#allaboutelectronics
#digitalelectronics
#ProgrammableArrayLogic
#PAL
Support the channel through membership program:
youtube.com/channel/UCBkOVp1Cqz4MR0LYR8vKpZg/join
--------------------------------------------------------------------------------------------------
Follow my second channel:
youtube.com/channel/UCGA2TO8ylVqFHpucwn_6Jlw
Follow me on Facebook:
facebook.com/ALLABOUTELECRONICS
Follow me on Instagram:
instagram.com/all_about.electronics
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Music Credit: bensound.com
![Half Subtractor and Full Subtractor Explained
In this video, the Half Subtractor and Full Subtractor are explained in detail.
By watching this video, you will learn what is half and full subtractors and how to implement a full subtractor using half subtractors.
Timestamps:
0:00 Half Subtractor
3:34 Full Subtractor
11:11 Full Subtractor using Half Subtractors
What is Half Subtractor?
It is the combinational circuit that performs the subtraction of two input bits and generates the difference and borrow bits as an output.
The logic circuit of the Half subtractor consists of one two-input XOR gate (Difference output) and, one AND gate and NOT gate (Borrow Output).
The Boolean expression of Difference and Borrow output of Half Subtractor:
D = A (XOR) B (The difference output)
B = AB. (The borrow output)
The half-subtractor circuit can perform the subtraction of two one-bit numbers without any borrow input. It is suitable for the subtraction of the two one-bit numbers at the LSB positions.
Full Subtractor:
The Full-subtractor is the combinational circuit that performs the subtraction of two input bits and the incoming borrow bit and generates the difference and the borrow bits as an output.
The Boolean expression of Difference and Borrow output of Full Subtractor:
D = A (XOR) B (XOR) Bin
Bout = AB + Bin [ A (XOR) B ]
The Full Subtractor circuit can be implemented using the two Half Subtractors and one OR gate. In this video, the design of Full Subtractors using Half Subtractors is also explained.
Digital Electronics (Playlist):
https://youtube.com/playlist?list=PLwjK_iyK4LLBC_so3odA64E2MLgIRKafl
This video will be helpful to all the students of science and engineering in understanding the Half Subtractor and Full Subtractor Circuits, and how to design a Full Subtractor using Half Subtractors.
#ALLABOUTELECTRONICS
#HalfSubtractor
#FullSubtractor
#DigitalElectronics
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Music Credit: http://www.bensound.com Half Subtractor and Full Subtractor Explained](https://i.ytimg.com/vi/lqN8xLTtdaA/mqdefault.jpg)









