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Re: role played by W/L ratio
1. Current carrying capability depends on the W/L ratio of the device.
2. Resitance is inversely proportional to this ratio.
3. in CMOS Device PMOS is generally a weak device & NMOS is a strong device to control the delay. As strong PMOS results in high delay...
synopsys set_mode
set_mode command is used for the timing analysis of blocks which have multiple operating modes.
like RAM-read ,write .Earlier for timing analysis all modes are enabled and most restrictive arcs were used for analysis.
With this command mode based timing analysis is possible.
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