simple circuit for 1/4 frequency dividing

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leo_o2

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1/4 frequency dividing

Hi Guys,



Is there a smaller circuit(with fewer transistors) for 1/4 frequency dividing than two cascoding D-flipflop?



Thanks.
 

Re: 1/4 frequency dividing

A std (master-slave) DFF needs about 30 transistors. May be these papers may help:
 

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Re: 1/4 frequency dividing

Any better idea?

Thanks.
 

Re: 1/4 frequency dividing

I read a paper (sorry i forgot its title) in which the authors used a filter to ensure the frequency division in the feedback part of a PLL.
 

1/4 frequency dividing

A digital circuit with minimized die size is expected. The main target is to minimize the die size for 1/N frequency dividing，where N is very big.
 

Re: 1/4 frequency dividing

leo_o2 said:
Hi Guys,



Is there a smaller circuit(with fewer transistors) for 1/4 frequency dividing than two cascoding D-flipflop?



Thanks.
Click to expand...

it is sure ,u can use dff such tspc
 

1/4 frequency dividing

how about realizing it using a multiplexer. A mod n counter acts as divide by n circuit. We can design a counter using a multiplexer.
 

Re: 1/4 frequency dividing

leo_o2 said:
Hi Guys,



Is there a smaller circuit(with fewer transistors) for 1/4 frequency dividing than two cascoding D-flipflop?



Thanks.
Click to expand...

it is sure ,u can use dff such tspc

Added after 49 seconds:

leo_o2 said:
Hi Guys,



Is there a smaller circuit(with fewer transistors) for 1/4 frequency dividing than two cascoding D-flipflop?



Thanks.
Click to expand...

it is sure ,u can use dff such tspc
 

What's the smallest dff for 1/2 frequency dividing?
 

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