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cordless mouse or keyboard does not obey USB protocol.
They make some changes in the protocol stack and transmit the data wirelessly.
USB supports multi-level star topology.
filler cells and corner cells
Corner cells - For pad ring connectivity.
Had heard about die seal (it is between the border of the chip and the scribe line)... but not scribe seal.
Re: CROSSTALK
If the aggressor and victim are moving in the same direction, the victim net switches faster. This may lead to hold violation.
There will be a setup violation if both the aggressor and viction are switching in different direction. (In this case, there is a crosstalk induced delay...
Whether this will work?
Data to D pin of the FF.
Data -> buf -> Input A of XOR
Data -> buf -> not -> not -> not -> not -> Input B of XOR
Output of XOR -> Input A of AND
Clk -> Input B of AND
Output of AND -> CLK pin of FF
regards,
Arun
reg aggressor
Nets switching at high frequency (Ex: clock nets, High freq data nets) (Aggressors) affect the nets adjacent to it (victim). This is due to the coupling capacitance between the two nets.
It is true negative propagation delay can be achieved. I had heard about negative propagation delay inverters. Suppose if the consider any voltage below 20% of VDD as logic 0, and if the input changes from logic 0 to logic 1, in a negative prop delay inverter, the output goes to logic 0 before...
There may more than one path through the combinational logic between the two FFs. We consider the maximum delay path between the two FFs for setup and minimum delay path for hold violations. So, if we increase the positive skew, we can avoid the setup violation with respect to the maximum delay...
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