Active Low S R Latch and Flip Flop

There is one type of latch which is SET when S = 0(LOW), and this latch is known as Active Low S R Latch.This latch is normally designed by using NAND gates. The logical circuit is shown below. In the above logic circuit if S = 0 and R = 1, Q becomes 1. Let … Read more

S R Flip Flop S R Latch

Most simple type of flip flop is S R Flip Flop. It has two inputs S and R and two outputs Q and . The state of this latch is determined by condition of Q. If Q is 1 the latch is said to be SET and if Q is 0 the latch is said … Read more

Latches and Flip Flops

Flip flop is an important basic memory element for digital circuit. Flip-flop is designed by assembling different logic gates. Single logic gate does not have any information storing capacity but by combining different such gates one can make such a digital circuit which can store digital information. Flip flop is such circuit. There are different … Read more

Application of Flip Flops

Registers Registers are the devices which are meant to store the data. As known, each flip-flop can store a single-bit of information. This means that by cascading n flip-flops, one can store n bits of information. Such an arrangement is called an n-bit register. For example by cascading three D flip-flops as shown in Figure … Read more

Conversion of Flip Flops

Conversion of flip-flops causes one type of flip-flop to behave like another type of flip-flop. In order to make one flip-flop mimic the behavior of another certain additional circuitry and/or connections become necessary. Conversion of JK Flip-Flop to SR Flip-Flop Step 1: Write the Truth Table of the Desired Flip-Flop Here SR flip-flop is to … Read more

D Flip Flop or D Latch

In Active High S-R Flip Flop when S and R both are 0, there will be no change in the output of the latch and when both S and R are 1 the output of the latch is totally unpredictable. In Active Low S-R Flip Flop when S and R both are 1, there will … Read more

Gated S R Latches or Clocked S R Flip Flops

In latch we so far discussed can change its state instantaneously on the application of required inputs conditions. They are asynchronous latches. On the other hand, a gated S-R latch can only change its output state when there is an enabling signal along with required inputs. That means the inputs can only act upon when … Read more

Sequence Generator

We all know that there are counters which pass through a definite number of states in a pre-determined order. For example, a 3-bit up-counter counts from 0 to 7 while the same order is reversed in the case of 3-bit down counter. These circuits when suitably manipulated can be made to count till an intermediate … Read more

J K Flip Flop

JK flip-flop is a sequential bi-state single-bit memory device named after its inventor by Jack Kil. In general it has one clock input pin (CLK), two data input pins (J and K) and two output pins (Q and Q̅…) as shown by Figure 1. JK flip-flop can either be triggered upon the leading-edge of the … Read more

Master Slave Flip Flop

Master Slave flip flop are the cascaded combination of two flip-flops among which the first is designated as master flip-flop while the next is called slave flip-flop (Figure 1). Here the master flip-flop is triggered by the external clock pulse train while the slave is activated at its inversion i.e. if the master is positive … Read more