![]() More importantly, the proposed configuration could simultaneously provide the multi-functionalities of logic gates, memory, and artificial synapses. Here, we propose a silicon-foundry-line-based multi-gate one-transistor design to simplify the conventional multi-transistor logic gates into one-transistor gates, thus reducing the circuit footprint by at least 40%. However, these strategies are still far from being widely applicable owing to their incompatibility with the modern silicon-based foundry lines. Pin 8 and 9 are the inputs of the third gate whose output is at pin 10.Logic gates are fundamental components of integrated circuits, and integration strategies involving multiple logic gates and advanced materials have been developed to meet the development requirements of high-density integrated circuits. Again Pin 5 and 6 are the inputs of the second gate whose output is at Pin 4. Pin 1 and 2 are the inputs of the first gate whose output is in number 3. Now see the below internal diagram of this circuit to make it more clear. In this IC there are also 4 gates together. This IC also has two inputs and one respective output. In CMOS logic i.e complimentary MOSFET logic I.C number of AND Gate is 4081. if input voltage be more than this it may cause damage to the IC. Pin 14 is the supply input which can be a maximum of 5.2 volt D.C. The inputs of the fourth are pin 12 and 13 and pin 11 is its output. Again 4 and 5 are the inputs of the second gate whose output is at pin 6. Here pins 1, 2 are the inputs of the first gate whose respective output is 3. Let us have a look at the internal diagram of 7408. 7408 is Quad 2- input IC where four gates are present together. As a result, the supply voltage +5V appears at X, and X will become logically 1 or high.įor AND Gate IC number in TTL is 7408. Enter supply voltage will drop across R and the base potential of the transistor T 3 will be zero and T 3 becomes in OFF condition. This makes both the transistor T 1 and T 2 are in ON condition. at the base of transistor T 1 and T 2 respectively. Now we will check what will be the logical value of X if both A and B are at high logical value. If any of the transistors T 1 and T 2 are in OFF condition, the same result will come at output X as both the transistors are in series. As a result, the entire supply voltage will drop across R 1, and the potential of terminal X will become low or logical zero. The current then starts flowing the supply to the ground through T 3. As the path through T 1and T 2 is an open-circuited base of transistor T 3 enough potential to makes T 3 ON. Zero base voltage makes a transistor OFF. This is because terminal A and B are base terminal of transistor T 1 and T 2 respectively. In this condition, supply voltage +5V at point C will get a path through either of diodes or both to the ground potential. Now, if either point A or B or both are applied with 0 Volt or they are grounded, the respective diode will become forward biased and hence behaves as ‘ON’ or short-circuited. As the supply voltage +5V appears at X, the output of the circuit is considered as high or logical 1. In this situation as both diodes are OFF, no current will flow through resistor R and voltage of C (+5V) will also appear at X. Now if we apply +5V at A and B, both of the diodes are reversed biased and hence behave both diodes as OFF or open circuit. ![]() In the above diode circuit, we first apply +5V at C. The basic circuit of a diode AND gate is shown below When diodes are used to design AND gate, it is called a diode AND gate. Normally an AND gate is designed by either diodes or transistors. AND Gate Circuit Diagram AND Gate Diode Circuit Diagram In digital electronics, other logic gates include NOT gates, OR gates, NAND gates, NOR gates, XOR gates, XNOR gates. The truth table of a 3 input AND gate is: ![]()
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