In a logic circuit, three SPST (Single Pole Single Throw) switches are used to implement a logic gate. The switches are connected in series. What is the output of the circuit if all switches are closed?
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In a digital logic circuit, SPST (Single Pole Single Throw) switches can be used to represent basic logic operations. When switches are connected in series, they function as an AND gate. This is because the current can only flow through all switches if every switch is closed (i.e., all input conditions are true or 1). Therefore, the logic operation performed by this configuration is:
Output = A AND B AND C
Explanation:
- When a switch is closed, it represents a logic state of 1 (True).
- For a series configuration of switches (AND logic), the output will only be 1 if all switches are closed.
- If any switch is open, the circuit is broken, and the output will be 0.
In this specific scenario:
- All switches are closed.
- Therefore, all inputs are 1.
- The AND operation with inputs 1, 1, and 1 results in an output of 1.
Thus, the output of the circuit is 1.
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Important Questions from Logic Gates
Which logical gate is used to represent product of sum expression?
Which gate is represented by the following truth table?
Input
Output
A
B
C
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
0
Which logical gate is included in a binary adder circuit to enable binary addition and subtraction?
Which of the following represents the XNOR gate?
A Circuit that operates in such a way that its output is high only when all its inputs are high
