JK FLIP FLOP MULTISIM UPDATE

We used 2_1 Mux for the inputs on each flip-flop except the first one. We combine up & down counter of T-flip flop into one counter. The Mux selects one counter using the select switch which is the mode switch. This Counter combines up-counter & down-counter using 2_1 mux. When the mode M = 0 it counts up & when mode M = 1 then it counts down. There is a mode switch which switches between the two modes of the counter. This counter has two modes of counting i.e. Schematic of Synchronous Down-counter using D-flip flops is given in the figure below. Q 2 = 0, when in its previous state the OR of Q 1 & Q 0 is equal to Q 2.So D 2 = Q 2 XNOR (Q 1 + Q 0) Q 2 = 1, when in its previous state the OR of Q 1 & Q 0 is equal to Q 2. Q 1 = 1, when its previous state Q 1 &Q 0 are equal & Q 1 = 0, when its previous state Q 1 &Q 0 are not equal. Because it will toggle the state whenever a clock pulse hits the FF 0. Q 0 is continuously changing so the input to FF 0 will be D 0 = QМ… 0. so its design is different than T-flip flop design.ДЄccording to the state table of down-counter The schematic for Down-counter using T-flip flops is given belowД-flip flop updates its states according to the input D i.e. So the input to FF 2 will be the AND of complemented outputs of FF 0 & FF 1 i.e. So the input to FF 1 will be the complemented output of FF 0 i.e. Q 1 toggles its state when the previous state is QВ 0 = 0. Q 0 Вis continuously toggling so the input to the FF 0 will be permanent 1. T-flip flop toggles its state when T-input = 1 & hold its state when T=0.ДЄccording to the state table of Down-counter The state table for down counter is given below: Down counter can also be designed using T-flip flop and D-flip flop.Д¬onsider 3-bit counter with each bit represented by Q 0, Q 1, Q 2as the outputs of flip-flops FF 0, FF 1, FF 2 respectively. You may also read: Ring counter and Johnson counterДown counter counts in descending order from 15 to 0 (4-bit counter).Schematic of Synchronous Up-counter using D-flip flop is given in the figure below. Q 2 = 0, when in its previous state the AND of Q 1 & Q 0 is equal to Q 2.So D 2 = Q 2 XNOR (Q 1& Q 0) Q 2 = 1, when in its previous state the AND of Q 1 & Q 0 is not equal to Q 2. Q 1 = 1, when its previous state Q 1 &Q 0 are not equal & Q 1 = 0, when its previous state Q 1 &Q 0 are equal.

JK FLIP FLOP MULTISIM UPDATE

This implies that all the flip-flops update its value at the same time. their clock inputs are connected together and are triggered by the same external clock signal. What is Synchronous Counter?ДЄs the name implies, the synchronous counter contains flip-flops which are all in sync with each other i.e. So this counter can also be modified into a timepiece given the clock signal has a time period of 1 second. The time period of clock signal will affect time delay in the counter. So the counter will count up or down using these pulses. Digital counters mainly use flip-flops and some combinational circuits for special features.ДЄs we know flip-flop operates on clock pulses. Advantages / Disadvantages of Synchronous CountersДЄ digital binary counter is a device used for counting binary numbers.

Jk flip flop multisim