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Hi z0123hello everyone.
I have a problem about D Flip-flop.
What kind of D Flip-flop can work at GHz.
Please tell me.
Thank you.
Normal CMOS F/F can work in GHz range make sure the ft for the MOSFET used in that technology is very high. Typically for 5GHz kind of result, devices with ft > 30-40GHz should work.
(Though its not a thumb rule .... just from experience).
Any thing higher than that you can look into CML architectures ... just Google it up ... Hope it will help
hello everyone.
I have a problem about D Flip-flop.
What kind of D Flip-flop can work at GHz.
Please tell me.
Thank you.
I want to design a D Flip-flop .
I want to design a DFF for phase detection.hello everyone.
I have a problem about D Flip-flop.
What kind of D Flip-flop can work at GHz.
Please tell me.
Thank you.
First of all, I'm not sure why this question is in the Analog forum, and second, I think the OP is looking to BUY a FF, not design one. There are no OTS CMOS FF's that I'm aware of that will run anywhere near 1GHz.
I want to design a DFF for phase detection.
I used TSPC DFF to do that. but output is wrong.
**broken link removed**
the DFF clock catch low but output q is high.
this is why I want to design a high frequency DFF.
Thanks
Hi barry,
I agree that the post should not have been in the analog forum.
and CMOS F/F does work in >1GHz range for technology below 130nm where MOSFET have ft > 30-40GHz ....
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Hi z0123,
I dont know why I am unable to open your attachment ... can you check that once ...
Any ways for high speed digital ckts in CMOS domain you have to look at the MOS ft numbers first and then decide whether you can design it in your desired range.
Refer to my first post ..... hope it will help ..