Table of Contents
How is an AND gate built?
A simple 2-input logic AND gate can be constructed using RTL Resistor-transistor switches connected together as shown below with the inputs connected directly to the transistor bases. Both transistors must be saturated “ON” for an output at Q.
What is the AND gate rule?
The AND gate is a basic digital logic gate that implements logical conjunction (∧) from mathematical logic – it behaves according to the truth table above. A HIGH output (1) results only if all the inputs to the AND gate are HIGH (1). If none or not all inputs to the AND gate are HIGH, LOW output results.
How do you make a logic gate?
Simple digital logic gates can be made by combining transistors, diodes and resistors with a simple example of a Diode-Resistor Logic (DRL) AND gate and a Diode-Transistor Logic (DTL) NAND gate given below.
How do you make an AND gate from NAND?
AND: You can create an AND gate by using two NAND gates. The first NAND gate does what NAND gates do: returns LOW if both inputs are HIGH and returns HIGH if both inputs are anything else. Then the second NAND gate is configured as a NOT gate to invert the output from the first NAND gate.
Can AND gate have 3 inputs?
Like the AND gate, the OR function can have any number of individual inputs. However, commercial available OR gates are available in 2, 3, or 4 inputs types. Additional inputs will require gates to be cascaded together for example.
IS AND gate multiplication?
The crucial difference between AND gate and OR gate is that AND gate performs multiplication of the digital inputs. As against the OR logic gate is used to execute the addition of the digital inputs.
What are the three basic gates?
All digital systems can be constructed by only three basic logic gates. These basic gates are called the AND gate, the OR gate, and the NOT gate. Some textbooks also include the NAND gate, the NOR gate and the EOR gate as the members of the family of basic logic gates.
How many two input AND and OR gates are required?
So, three AND gates of two inputs are required. As only two input OR gates are available, so two OR gates are required to get the logical sum of three product terms.Digital Circuits Questions and Answers – Logic Gates and Networks – 1. INPUT OUTPUT A B C 0 0 1 0 1 0 1 0 0.
How do you make a 4 input OR gate?
What are universal gates?
A universal gate is a gate which can implement any Boolean function without need to use any other gate type. The NAND and NOR gates are universal gates.
What does a NOT gate look like?
The standard NOT gate is given a symbol whose shape is of a triangle pointing to the right with a circle at its end. This circle is known as an “inversion bubble” and is used in NOT, NAND and NOR symbols at their output to represent the logical operation of the NOT function.
How many NAND gates make and gate?
Using two NAND gates one can make an AND gate.
What is negative or gate?
An OR gate with inverted inputs is called a negative OR gate, and an AND gate with inverted inputs is called a negative AND gate. Thus, a NAND gate is equivalent to a negative OR gate.
What is the truth table for AND gate?
The table used to represent the Boolean expression of a logic gate function is commonly called a Truth Table. A logic gate truth table shows each possible input combination to the gate or circuit with the resultant output depending upon the combination of these input(s).
What is the only function of not gate?
A NOT gate performs logical negation on its input. In other words, if the input is true, then the output will be false. Similarly, a false input results in a true output. The truth table for a NOT gate appears to the right.
How do you make an AND gate out of an OR gate using inverter?
To build an inverter from NAND, simply connect the two inputs of the NAND together and use this junction as input of the inverter. Therefore an AND gate can be realized simply as a NAND followed by another NAND with 2 inputs tied together.
HOW IS AND gate different from or gate?
What is the difference between AND gate and OR gate? 1. AND gate gives a ‘true’ output only when both inputs are ‘true’, whereas OR gate gives an output of ‘true’ if at least one of the inputs is ‘true’. AND gate implements logical conjunction and OR gate implements logical disjunction.
Can we convert or gate to gate?
It is still possible to create an OR function from an AND / NAND gate and inverters, or an AND gate from a NOR / OR function. The diagram below gives some of the conversions. As an example it can be seen that a NOR gate is the same as an AND gate with two inverters on the input.
How do gates work?
“In a computer, a gate controls the flow of electric current through a circuit. The gate consists of transistors; the transistors are selected by the chip designer from two basic types (PMOS and NMOS transistors) that are found in the ubiquitous CMOS (complementary metal-oxide semiconductor) technology.
What are derived gates?
The Derived Gates are the gates that are derived from the fundamental gates. Explanation. The three logic gates AND, OR and NOT are known as fundamental gates. The Derived Gates are the gates that are derived from these fundamental gates. For Example: NAND, NOR, XOR, XNOR.
What are the seven logic gates?
There are seven basic logic gates: AND, OR, XOR, NOT, NAND, NOR, and XNOR. The AND gate is so named because, if 0 is called “false” and 1 is called “true,” the gate acts in the same way as the logical “and” operator.
Which gate is an inverted and gate?
Inverted AND gate is called NAND gate and Inverted OR gate is called NOR gate. इनवर्टर गेट किस गेट को कहा जाता है।.
Why XOR gate is called an inverter?
Why XOR gate is called an inverter? Explanation: The XOR (Exclusive Or) gate has a true output when the two inputs are different. When one input is true, the output is the inversion of the other. When one input is false, the output is the non-inversion of the other.
How many stages a DTL consists of?
How many stages a DTL consist of? Explanation: The DTL circuit shown in the picture consists of three stages: an input diode logic stage, an intermediate level shifting stage and an output common-emitter amplifier stage.
