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How OR and AND NOT gates are Realised using diode and transistor?
Discrete OR gates may be realized by using diodes or transistors. The inputs represented as X and Y may be either 0V or +5V correspondingly. The output is represented by Z . In the diode of OR gate, when both the inputs are of same value, X=0V and Y= 0V, then both the diodes are in OFF condition.
Why transistor is used in not gate?
It gives only one output which is the negation value of the corresponding input. When the input is forced to low value it gives high value at the output and vice – versa. A transistor is used for switching or amplification purpose. Due to this property, we are using it as a switch for NOT gate operation.
How to construct logic gates from resistors and diodes?
B.2 Logic Gates from Resistors, Diodes, and Transistors In this subsection, we investigate how to construct logic functions from fundamental electrical objects like resistors, diodes, and transistors. B.2.1 Voltage Dividers
How are transistors used in a gate circuit?
When both the inputs are held high, both transistors are active, but the same voltage is dropped across the emitter resistor, and the output is still high. This circuit shows perfect OR behaviour.
How are diodes connected in an integrated circuit?
In an integrated circuit version of the DTL gate, R3 is replaced by two level-shifting diodes connected in series. Also the bottom of R4 is connected to ground to provide bias current for the diodes and a discharge path for the transistor base. The resulting integrated circuit runs off a single power supply voltage.
Which is a function of a diode AND gate?
At the left of the figure is a diode AND gate, and at the right a diode OR gate. Let’s examine the AND gate first. If one of the inputs Aor Bis grounded, current flows through the diode and the output node Xis at a low voltage. The only way to get a high output is by having both inputs high. This is clearly a logical AND function.