The NOR Gate
- A NOR gate is a combination of OR gate and NOT gate. So we can say it is a NOT-OR operation. It may have two or more input and an output. The logical symbols and the truth table of NOR gate are,
- It is clear from the truth table that the output is ‘1’ only if all the inputs are at logic ‘0’. It can also say that if the inputs 1, A B = = then the output Y is 1. Thus, the NOR gate is equivalent to the AND gate with inverted inputs and it can be realized by a bubbled AND gate.
- The logical expression for the output is
- The NOR gate is also called active LOW AND gate.
- The switching circuit of a NOR gate is,
When any of the switches either A or B is closed, the bulb will not glow.
- NOR gate follows the commutative law as
Note: Unused input in any multi input NOR gate is always connected to the enable logic or Pull-Down.
<< Previous | Next >>
Must Read: What is Boolean algebra?
Dear Aspirants,
Your preparation for GATE, ESE, PSUs, and AE/JE is now smarter than ever — thanks to the MADE EASY YouTube channel.
This is not just a channel, but a complete strategy for success, where you get toppers strategies, PYQ–GTQ discussions, current affairs updates, and important job-related information, all delivered by the country’s best teachers and industry experts.
If you also want to stay one step ahead in the race to success, subscribe to MADE EASY on YouTube and stay connected with us on social media.
MADE EASY — where preparation happens with confidence.
MADE EASY is a well-organized institute, complete in all aspects, and provides quality guidance for both written and personality tests. MADE EASY has produced top-ranked students in ESE, GATE, and various public sector exams. The publishing team regularly writes exam-related blogs based on conversations with the faculty, helping students prepare effectively for their exams.
