Home / Flip Flops – Notes – 1

# Flip Flops – Notes – 1

1. A flip-flop is a logic circuit with a memory characteristic such that its $Q$ and $\bar{Q}$ outputs will go to a new state in response to an input pulse and will remain in that new state after the input pulse is terminated.

2. A NAND latch and a NOR latch are simple FFs that respond to logic levels on their SET and RESET inputs.

3. Clearing (resetting) a FF means that its output ends up in the $Q=0/\bar{Q}=1$ state. Setting a FF means that it ends up in the   $Q=1/\bar{Q}=0$ state.

4. Clocked FFs have a clock input (CLK, CP, CK) that is edge-triggered, meaning that it triggers the FF on a positive-going transition (PGT) or a negative-going transition (NGT).

5. Edge-triggered (clocked) FFs can be triggered to a new state by the active edge of the clock input according to the state of the FF’s synchronous control inputs (S,R or J, K or D).

6. Most clocked FFs also have asynchronous inputs that can set or clear the FF independently of the clock input.

7. The D latch is a modified NAND latch that operates like a D flip-flop except that it is not edge-triggered.

8. Some of the principal uses of FFs include data storage and transfer, data shifting, counting, and frequency division. They are used in sequential circuits that follow a predetermined sequence of states.

9. A one-shot (OS) is a logic circuit that can be triggered from its normal resting state $( Q=0)$ to its triggered state $( Q=1 )$, where it remains for a time interval proportional to an RC time constant.

 Flip-Flops – Mcq Flip-Flops – Notes Flip-Flops – IQ

General Knowledge Books

## -23% General Knowledge 2019 Price: INR 23.00 Was: INR 30.00 -5% General Knowledge Price: INR 205.00 Was: INR 216.00 -20% Objective General Knowledge Chapterwise Collection of 6250+ Questions Price: INR 236.00 Was: INR 295.00 Concise General Knowledge 2018 Price: Check on Amazon -10% General Knowledge 2018 (Old Edition) Price: INR 27.00 Was: INR 30.00 -21% Objective General Knowledge Price: INR 310.00 Was: INR 390.00 ‹›

Be a Part of the New & Next

Share the Knowledge

Copy Protected by Chetan's WP-Copyprotect.