11/29/2023 0 Comments Transistor not gateSo it acts like a closed switch from collector to emitter i.e, almost zero resistance between collector and emitter. In this case, there is some threshold voltage at the base of the transistor. All current flow from the resistor to LED and then to ground i.e, through the path of minimum resistance. And due to this no current flow from collector to Ground. So it acts like an open switch from collector to emitter i.e, infinite resistance between collector and emitter. In this case, there is no voltage at the base of the transistor. And whenever there is no or less voltage then threshold voltage at the base, it acts like an open circuit from collector to emitter. Whenever there is some threshold voltage at base, transistor acts like a closed switch from collector to emitter. Ground- Negative terminal of the battery.īC547 Transistor acts like a switch in this circuit. Output indicator i.e LED is connected between collector and emitter(Gnd).ĥ. Emitter goes to Ground i.e, -ve terminal of the battery.Ĥ. Logic inputs is given to base of the transistor through 100 ohm resistor.ģ. ![]() Collector goes to +ve terminal of battery through 1k resistorĢ. This is the circuit we are going to build on Breadboard.ġ. You can also watch the video below for quick reference: So when the input is 0, the output is 1 and when the input is 1, the output is 0. There is only one input and one output in a NOT Gate. NOT gate is a Logic Gate and called so because NOT means “Opposite”. **Read Similar Article: And Gate using Diodes But do you know, you can build your own NOT Gate on Breadboard? So in this post, you will learn how to make a NOT Gate using a transistor on a Breadboard. What is the IC number of NOT gate?Īnswer: Mostly used NOT gate IC is 7404 available in Dual-in-line package.I am sure you must be familiar with a NOT Gate, it’s Truth Table, Logic symbol, and its working. if the input is a “LOW” signal then it converts to a “HIGH signal” and vice versa. Q.No.1: Why NOT gate called as inverter IC also?Īnswer: The property of the NOT gate is to complement or invert the INPUT signal i.e. In this article, we have learned about the NOT gate symbol, truth table, transistor circuit, and NOT gate 7404 IC details and their minimum recommended settings. Recommended setting of NOT gate 7404 IC Conclusion The detailed datasheet of NOT gate IC is available here. NOT gate IC working temperature condition is -55 degree Celsius to 125 degrees Celsius. The logic “HIGH” is considered if the voltage is higher than 2V and logic “LOW” is considered if the voltage signal is less than 0.8V. The MIN supply voltage is 4.5V required and MAX V cc should be up to 5.5V. Recommended operating conditions for NOT gate IC are provided in the following table. Recommended operating conditions of NOT gate circuit Inverter output pins are 1Y, 2Y, 3Y, 4Y, 5Y, and 6Y.Pin Number naming with 1A, 2A, 3A, 4A, 5A, and 6A are input pins.The pin diagram of NOT gate IC in different packages is provided below: SN7404 (D or N package) SN5404 (W package) SN54LS04 (FK Package) It is available in Dual In line package and Quad in line package. If the Switch (SW1) is open then the output load bulb is “ON” and if the Switch is closed then the output is “LOW”. The logic of the NOT gate is explained above as an electrical circuit. Thus the Output turns to the logic level as “LOW”. Vice versa when signal A is “HIGH” then the transistor is working and current flows from the R2 resistor to the ground and makes it a short circuit. In this case, the current flows from the R2 resistor and thus creates inverted output. If no voltage is provided from A Input signal transistor will be in an OFF state as no current flows the collector-emitter path. The Input Signal “A” is connected through the R1 resistor to the base of the transistor. NOT Gate Transistor Circuit NOT gate Transistor Circuit In the above simulation if the input signal is “LOW” or 0 then the output LED is glowing and when the input signal is “HIGH” or 1 is applied then LED remains “LOW” or off. ![]() The truth table of NOT gate can be checked in following simulation In vice versa, if the input is a “LOW” signal then the output becomes a “HIGH” signal. The truth table of not or inverter gate is follows A (Input)Īs we can see in the above table if the input A is “HIGH” not or the inverter gate complements the input and make it a “LOW” signal. NOT gate Symbol Boolean expression of NOT gate NOT Gate truth table Suppose the input signal is A and the output signal is Y so the Boolean expression of NOT gate represents as follows. If no “bubble” is available in the symbol then it works as a buffer gate. The “bubble” (o) represents at the end of the gate represents a complement of the input signal.
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