Oct 7, 2008 #1 K kkokkogom Newbie level 4 Joined Sep 26, 2008 Messages 6 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,323 Hi~ I made J-K flip-flop, but it doens't work properly (I attached my schematic and results) output of Q_b looks OK ,but Q is not right Nand and Nand_3 works well. I thought JK flip flop is quite easy though... Please give me some advice [/img]
Hi~ I made J-K flip-flop, but it doens't work properly (I attached my schematic and results) output of Q_b looks OK ,but Q is not right Nand and Nand_3 works well. I thought JK flip flop is quite easy though... Please give me some advice [/img]
Oct 7, 2008 #2 S saro_k_82 Full Member level 6 Joined May 17, 2007 Messages 385 Helped 106 Reputation 212 Reaction score 45 Trophy points 1,308 Location India Activity points 3,835 With this circuit you can only expect this. Q won't toggle and worse it can take a lot of glitch current. Design a better JK flop.
With this circuit you can only expect this. Q won't toggle and worse it can take a lot of glitch current. Design a better JK flop.
Oct 8, 2008 #3 K kkokkogom Newbie level 4 Joined Sep 26, 2008 Messages 6 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,323 saro_k_82 said: With this circuit you can only expect this. Q won't toggle and worse it can take a lot of glitch current. Design a better JK flop. Click to expand... Thank you I googled website but I couldn't find 'better' one. do you mean master-slave jk-flip flop?
saro_k_82 said: With this circuit you can only expect this. Q won't toggle and worse it can take a lot of glitch current. Design a better JK flop. Click to expand... Thank you I googled website but I couldn't find 'better' one. do you mean master-slave jk-flip flop?
Oct 8, 2008 #4 diemilio Full Member level 6 Joined Sep 19, 2006 Messages 383 Helped 64 Reputation 126 Reaction score 15 Trophy points 1,298 Location Framingham, MA Activity points 3,797 I've used this circuit and it works fine. Remember you need to latches for a Flip-flop to work properly (by "work properly" I mean that the output value changes only when you have rising edge or falling edge of clk) **broken link removed** Hope this helps, diemilio
I've used this circuit and it works fine. Remember you need to latches for a Flip-flop to work properly (by "work properly" I mean that the output value changes only when you have rising edge or falling edge of clk) **broken link removed** Hope this helps, diemilio
Oct 8, 2008 #5 K kkokkogom Newbie level 4 Joined Sep 26, 2008 Messages 6 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,323 Thank you~
Oct 9, 2008 #6 diemilio Full Member level 6 Joined Sep 19, 2006 Messages 383 Helped 64 Reputation 126 Reaction score 15 Trophy points 1,298 Location Framingham, MA Activity points 3,797 no problem