Question

In: Electrical Engineering

Explain how the BJTs are used as switches to implement the NAND and NOR gates respectively.

Explain how the BJTs are used as switches to implement the NAND and NOR gates respectively.

Solutions

Expert Solution

BJT:

bipolar junction transistor

they can operate in reverse, saturation and active modes depending upon the biasing used

BJT can acts as a switch when the biasing is such that any form on input present at the base can lead to the conduction of current from emitter to collector. In this situation, the BJT will work as a switch.

as we know that Nand gate truth table the output is 0 when both the inputs are 1.

hence the two BJT will be series hence the collector of 1 will be connected to emitter and inputs will be given to the base o the two transistors. as shown the output is taken right after the supply to the first BJT since the output is always 1 until both the transistors are ON.

similarly with nor gates.

the output is 0 even if any 1 of transistors is on hence the transistors should be parallel. the output is taken near the vcc .

as shown:

Manojponduru answered 2 months ago
Next > < Previous

Related Solutions

Why are NAND gates considered to be a universal logic gate? How are NAND gates utilized?
Why are NAND gates considered to be a universal logic gate? How are NAND gates utilized?
Implement the following function using a binary decoder and as few NAND gates as possible. F=...
Implement the following function using a binary decoder and as few NAND gates as possible. F= A’B’C’D’ + A’B’C D’ + A’BCD’ + AB’CD’ + ABC’D’ + ABCD’ a) Draw the truth table for the function. (8 Pts) b) Implement the function using only one 74x138 decoder and as few NAND gates as possible. Clearly name all the signals in accordance with the documentation standards. (12 Pts) b) Implement the function using only one 74x138 decoder and as few NAND...
Build AND, OR and NOT gates using NOR gates only. (draw the circuit and show the...
Build AND, OR and NOT gates using NOR gates only. (draw the circuit and show the Boolean logic behind it - formulae Prove A' + AB = A + B using Venn diagram (set concepts) Write ALL the maxterms for a combination of three variables.
Construct a decoder for binary1100 using two input NAND gates only.
Construct a decoder for binary1100 using two input NAND gates only.
VLSI Question: Find the estimated rise and fall time of 5-input NOR and NAND
VLSI Question: Find the estimated rise and fall time of 5-input NOR and NAND
I need to implement the gates on Logism, please clearly explain all steps. Part A: Design...
I need to implement the gates on Logism, please clearly explain all steps. Part A: Design and wire a circuit to implement the Boolean expression S (x, y, z) = ∑m (1, 2, 4, 7) usingan 8-to-1 multiplexer . Verify the operation by checking all input combinations in the Boolean function's truth table. Part B: Implement the function S (x, y, z) from Part A using only a 4-to-1 multiplexer .You may use NOT gates as needed. Part C: Implement...
explain different types of switches and scanning and provide examples of when they can be used...
explain different types of switches and scanning and provide examples of when they can be used My major is rehabilitation services. the class is assistuve technology. the book is assistive technology for people with disabilities
Use as few 3-input NOR gates as possible to design a bubble detector circuit for 8-bit...
Use as few 3-input NOR gates as possible to design a bubble detector circuit for 8-bit thermometer code. An n-bit thermometer code represents an integer m, with m 1s followed by (n-m) 0s. 1-bit bubble is an error in coding when a solitary 0 (or 1) is found in between two 1s (or 0s). What is the size of your circuit in terms of the number of NOR gates used? Implement using structural verilog and include a test bench.
Use as few 3-input NOR gates as possible to design a bubble detector circuit for 8-bit...
Use as few 3-input NOR gates as possible to design a bubble detector circuit for 8-bit thermometer code. An n-bit thermometer code represents an integer m, with m 1s followed by (n-m) 0s. 1-bit bubble is an error in coding when a solitary 0 (or 1) is found in between two 1s (or 0s). Implement using structural verilog. Please do not answer unless familiar with Xilinx and verilog.
2. Design a digital circuit, using a decoder, only Nor gates, a 7-segment display, and D...
2. Design a digital circuit, using a decoder, only Nor gates, a 7-segment display, and D Flip Flops, that repeatedly outputs the sequences of characters ‘P’, ‘E’, ‘A’, ‘L’ if x=0 and ‘L’, ‘E’, ‘A’, ‘P’ if x=1 .
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT