Programmable Frequency Divider

[yellowperil]

programmable frequency divider

Hi,

Is it possible for divide by 4 or 5 programmable frequency divider to have different max operating frequency? If yes what might possible cause it to happen? Thanks.

 

[hanif]

programmable frequency

Hi,

if you want to know the concept of frequency division check this

 

[yellowperil]

frequency divider

Thanks I get to know of different type of frequency divider circuit.

 

[biff44]

programmable frequency divider circuit

Sure. A divide by 4 can be just 2 flip flop circuits in series.

A divide by 5 circuit needs 3 flip flops, and some way to reset them to zero when the count reaches 5. That extra circuitry has propagation delay, and if the frequency gets high enough, starts to reset unreliably.

 

[Fei]

programmable post divider

Yes, it is possible that the max freqeuncy is lower down caused by the feedback/combination logic.