Johnson Counter | 4 Bit Johnson counter using DFF | Twisted ring counter | Switch tail counter

#digitalelectronics
#digitalsystemdesign
#counter
#dsd
Johnson Counter using D flip flop
#applicationofshiftregister#dsd
switch tail ring counter
Johnson counter is an application of shift register
this is also called twisted ring counter
in this compliment output of last flip flop fed back to the input of first flip flop.
an n bit Johnson counter can count 2n states while n nit Ring counter can count only n states
link for Ring Counter
• U3 L6 | Ring counter |...
link for Johnson counter using JK FLIP FLOP
• U3L7 |Johnson Counter|...
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[@shivtejdeshmukh130]

you are the best out there among many teachers.... I know because I've watched almost everyone, you ma'am are just best 🙏🏻

[@TechnoTutorials2783]

Thank you so much

[@palsahab127]

Thanks for your concern mam, for our study.

[@ashishsavaratkar3418]

Mam how to design Johnson counter for initial state 0110

[@TechnoTutorials2783]

If u want to Initialize then u can use a initial pulse like ring counter and connect clear of 1st and last flip flop and preset of 2 and 3 ff to that pulse
One more thing after each clock 1st and last flip flop will not hold same value bcoz input of 1st connected with complemented output of last

[@igaming_]

Do i need to make clr=1 in the second step

[@TechnoTutorials2783]

Yes
And it will be high for rest all steps

[@ANUSH_STUDIO_]

What about 3 bit

[@TechnoTutorials2783]

There will be 3 flip flop and inverted output of last flip flop connected to the input of first ff

[@ANUSH_STUDIO_]

@techno tutorials ( e-learning)

[@ANUSH_STUDIO_]

Okay ma'am

[@metalhead3908]

what will be the state of twisted ring after 4th clock pulse if is initial stage is 1001001?
ih that 1001001 clock pulse which need to be changed according to stage??

[@TechnoTutorials2783]

clk data
initial 1001001
1st 0100100
2nd 1010010
3rd 1101001
4th 0110100

[@metalhead3908]

@@TechnoTutorials2783 thanks. Can you make video 0n 5 bit sequence recognizer with table and time graph

[@TechnoTutorials2783]

@@metalhead3908 ok

[@TechnoTutorials2783]

If possible send me the question

[@metalhead3908]

design sequence recognizer with state diagram and table to recognize 11001 pattern