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
Diiference between ROM and PROM. ROM: It also called Read Only Memory is a Permanent Memory. The data is permanently stored and cannot be changed in Permanent ROM. This can o
What are the components of I-way Infrastructure? There are three mechanism of the I-way infrastructure: Consumer access equipment Local on-Ramps Global informa
Q. Show Organisation of Clos network? Clos network: This network was designed by Clos (1953). It's a non-blocking network and offers full connectivity similar to crossbar netw
State the SELECTIVE CLEAR - logic micro operations The selective-clear operation clears to 0 bits in register A only where there are corresponding 1's in the register B. For
Q. Show the Memory Hierarchy of computer system ? Memory in a computer system is essential for storage and subsequent retrieval of instructions and data. A computer system uses
a) Briefly describe the relationship between distributed computing, mobile computing and pervasive computing. b) Suppose the following scenario, which demonstrate the possibili
Prolog: Still we can take our card game from the previous lecture like a case study for the implementation of a logic-based expert system. So there the rules were: four cards
Q. Illustrate about First Generation Computers? It is certainly ironic that scientific inventions of great impact have frequently been linked with supporting a very sad as well
Students are needed to work in group of 3 and make an Android mobile application falling under the following categories: Multimedia o Eg: Camera app, mp3 player, ga
Instruction Cycle The instruction cycle consists of a series of steps needed for the implementation of an instruction in a program. A typical instruction in a program is descri
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