BUFFERS VS CLOCK BUFFERS

[praneshcn]

What is differeence B/W normal BUf and CLK BUF?

 

[prithivikumars]

hi,

The clock buffers are designed with some special property like high drive strength and less delay. Because clock net is the more fanout and longest running net. Even you can use the normal buffers in the clock path.

Prithivi.

 

[aaronkong]

The rise & fall time is almost the same of the CLKBUF, it can min the skew for CTS.

 

[praneshcn]

hi ,

wat exactly makes the clk buf to drive to minimixe skew. y cant a normal buffer do it?

 

[onlymusic16]

Normal buffers are designed with p/n ratio such that sum of rise delay and fall delay is minimum (atleast for high speed libraries) whereas Clock buffers have equal rise and fall slew rates. Reason for doing this is to prevent duty cycle of clock signal from changing when it passes through a chain of clock buffers.

 

[santuvlsi]

dear friend,

In clock buffer we are unable to alter the rise time, fall time, clock period once if it designed to a particular period or frequency

whereas

Normal buffers we are able to alter to our wish.

Santu

 

[madan_soc]

50 % duty cycle