Question
Which circuit is bistable?
Answer Options
- A) An AND gate
- B) An OR gate
- C) A flip-flop
- D) A bipolar amplifier
Correct Answer: C
Explanation
A bistable circuit is a fundamental digital logic circuit capable of sustaining two stable output states indefinitely (a logic ‘1’ or a logic ‘0’) and switching between these states only when an external trigger signal is applied. This capability makes it an ideal component for memory and counting functions.
A flip-flop is the classic example of a bistable circuit . Its outputs remain in a constant state until a clock pulse or input change forces it to transition to the other stable state. This ability to store a single bit of binary data makes flip-flops the building blocks of counters, registers, and sequential logic devices in digital systems.
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