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Can someone tell me some ways that can be used to manual fix the timing violation in SOC encounter?
Now I did a case about 100MHz, Now there is about a timing slack about 0 ~ -1.8ns
for about 40 reg2reg paths. Other paths are already ok.
I let the tool itself to fix the timing violation...
I think :
1. wire pitch
2. available routing resource
3. target cell density in a certain area
4. target max circuit speed
decides some aspects of std cell's height
Thank you for your reply!
If an amp used in feedback, Vinn ≈ Vinp
then as you reply "The common mode voltage range of an opAmp is the input voltage range, where (for Vinp ≈ Vinn) the amplifier works correctly."
That is to say, the common mode voltage range = input voltage range?
Thank you!
For I look in the book that
the common vlotage=(Vinp + Vinn)/2
then if give the inverting amp's inp half of the supply as reference,
then the inn is half supply, So I think the common vlot is half supply.
According to your reply,
the common volt = ( (delta Vinn) + (delta Vinp))/2...
I found in the books that "
Inverting op amps do not suffer from common-mode rejection ration effects when
the amplifier inputs are permanently at ground for dual supply applications or half
the supply voltage in single supply applications. The non-inverting amplifier
configuration has a...
Use a rule script to see the distribute of a certain net, such as power or ground, is a quick way, but may sometime still have error due to oversight.
Maybe use a power simulation software to simulate the volt drop and EM is more accurate.
Though I have read the feedback chapter in books, still I can not analysis it.
The simplest inverting amp use what kinds of feedback?
volt-volt feedback? current-volt feedback? or others?
Please help me.
Sometimes I found in bipolar process, there are "single side junction".
But I do not know what is single side junction, Can anyone tell me ? or give me some link to explain this?
Thanks very much!
The leftmost line is ground line. This is certain.
according to the circuit analysis, the comb like area is collector, that's all.
of course, such analysis maybe wrong.
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