ITPEC FE Morning October 2019 Question 22
ITPEC FE Morning October 2019 — Question 22 of 80
Flip-flop — a sequential circuit with exactly two stable states.
A flip-flop (trigger) stores 1 bit of data by maintaining one of two stable states (0 or 1). It is the fundamental building block of memory and registers in digital circuits.
Key distinction:
- Sequential circuit — has memory, output depends on current input and previous state
- Combinational circuit — no memory, output depends only on current input
Why not others:
- (a) Adder circuit — combinational circuit that performs arithmetic addition
- (b) Capacitor — passive electronic component, not a logic circuit
- (d) NAND gate — combinational logic gate with no memory capability
Key rule: "Sequential circuit + two stable states" = flip-flop.
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