[time-nuts] low power divide by 5

[jimlux]

On 7/1/20 5:24 AM, Detlef Schuecker via time-nuts wrote:
> Hi,
> 
> there are three JK-FF, with Q1 as MSB, Q3 as LSB. J1,K1 ist input to Q1,
> etc. .
> There are 8^6 possibilties (6 inputs to the Qx or QxNOT or to HIGH or to
> LOW) of which
> 2069 generate a cycle length of 5.
> 
> The following wiring will generate the cycle 1 3 5 2 4 :
> 
> J1=Q2
> K1=Q1
> J2=Q3
> K2=Q2
> J3=Q2NOT
> K3=Q1
> 
> Q3 is output with a 3/5 duty cycle.
> The unused state 0 will migrate to 1,6->0,7->0.
> So the machine does not get stuck.
> 
> Cheers
> Detlef
> 
> 


And one can still buy 74AC109 dual JK which supposedly toggle at >100MHz.