Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Write short note on the Johnson counter.
Ans:
Johnson Counter: It is a synchronous counter, where all flip-flops are clocked concurrently and the clock pulses drive the clock input of all the flip-flops together therefore there is no propagation delay. Fig.(a) demonstrates the circuit of Johnson counter. In case of the D input of FF0 is driven by Q‾ output of FF3, that is, the complement of the output of the final flip flop is fed to the D of FF0. Feedback of this arrangement generates the sequence of states illustrated in Table no.1. The 4 bit sequence has a total of 8 states (there is n bit sequence will have 2n states). Therefore an n bit Johnson counter will have a modulus of 2n.
The Q output of all stage feeds the D input of next stage. Although the Q‾ output of the final stage feeds the D input of primary stage. The counter fills up along with 1's from left to right and after that fills up 0s again as demonstrated in Table no.2. Fig. (b) Demonstrates the wave shapes/timing diagram of 4 bit Johnson counter.
Fig.(a) Logic Diagram of Johnson counter
Clock Pulse
Q0
Q1
Q2
Q3
0
1
2
3
4
5
6
7
Table no.1 Sequence of states of 4 bit Johnson Counter
Fig.(b) Timing Diagram of 4-bit Johnson Counter
Clear operation The clear operation compares words present in A and B and produces an all 0's result if two numbers are equal. This operation is achieved by the exclusive-OR mi
Q. Evaluation Stack Architecture? A stack is a data structure which implements Last-In-First-Out (LIFO) access policy. You can add an entry to the with a PUSH(value) as well as
Execution of a program in CPU is completed employing different set of registers and their individual circuitry. As CPU registers are used for execution of interrupt service routine
Classification of Systems Systems may be categorized as follows: a) Formal or Informal b) Abstract or Physical c) Closed or Open d) Automated orManual.
Q. What is Instruction Register? Instruction Register (IR): Here instructions are loaded before execution. Comments on figure above are as below: All representations are
design modulo 12 up synchronous counter using t flip flop
Explain how presentation layer helps in establishing and processing data in End to End layers. The idea of the presentation layer is to stand for information to the communicati
Disadvantages of Stateful Multi-Layer Inspection A firewall such as the SMLI remains completely transparent to both users and applications. Consequently, SMLI firewall does no
With a neat diagram explain operation of time multiplexed space switching. Time division switches, an inlet or an outlet corresponded to a particular subscriber line with one s
If quicksort is so quick, why bother with anything else? If bubble sort is so bad, why even mention it? For that matter, why are there so many sorting algorithms?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd