Sense-Amplifier Flip-Flop

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dshoter13

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Hi.
I'm trying to design the following Sense-Amplifier Flip-Flop
I'm using TSMC 90nm CMOS technology, and I'm having troubles doing the design. I'm not getting what I expect at the output node.
Can anyone give me some ideas about the correcto sizing of the transistors? I'm trying to achieve a low metastability region, and a low Clock-to-Q delay.


The out is the Q, fast correspondes to the D and slow is the Clock.


Thank you for your atention.

Best regards.
 

After all, I was measuring in the wrong place. Now, I get Q always gnd and Q_ always High (VDD). Any sugestions?
 

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