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Maestro - get instant value of net for delay measurement

I have vdd ramping up & clkout follows the same vdd. But when measuring delay, threshold should be instant value of vdd / 2 rather than fixed vdd from variable. How to get this instant_vdd value for threshold entry? Attached picture shows plots & required expression format. Thanks.

Andrew Beckett 11 months ago
The threshold can't currently vary, but this is easily solvable by reformulating it slightly.

Change:

Signal1: VT("/clk_out")-VT("/vdd")/2

Signal2: VT("/clk_out")-VT("/vdd")/2

Threshold Value 1: 0

Threshold Value 2: 0

By subtracting half the supply voltage from the input signal, your threshold now is a fixed 0 value at all times - you've just "normalised" it to half the supply voltage.

Andrew
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firebolt3 11 months ago in reply to Andrew Beckett

Excellet Andrew. Thanks a lot.
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