I am looking for a JK flip-flop triggered by the rising and the falling edge of the clock signal. Does it exist? What is it's code?
- posted
17 years ago
edge triggered ff
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- posted
17 years ago
No, they're either + or - clock. Use a clock double in front?
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- posted
17 years ago
there is a couple of ways to work around that. i am sure such a FF does exist but i can't seem to find one in a single package.. any ways.. 1 approach is to use 2 different FF's one is a JK with Preset/Reset with lets say a negative edge trigger. the other FF is more of a generic JK type working with the Reset/preset of the first FF via a couple of and gates that also worked with the Q and /Q of the edged FF .. this would give you and effect of double pulses..
-- the other avenue would be to simply pass the clk pulse to a buffer and inverter stage and then use the output's of each decouple with a cap to the input of the CLK on the edged FF.. this would thus give you 2 pulses of the polarity that your looking for. this i have done my self in the past and it works find, you must select a just large enough where it will give the minimum on time required by the FF to activate. just and idea..