Shmoo Plots

The Shmoo plot will be illustrated by measuring the effect of power supply reduction on performance:
Nominally, a DUT operates at 1 Volt Vdd with 25 ns delay. A set of test patterns is applied repeatedly to the DUT while sweeping:

Click to restart Shmoo Setup

The expected result of the measurement is:

  1. For low supply voltages, the functional test will not pass.
  2. At a certain voltage, the DUT will pass functional test at high delay times.
  3. Increasing voltage further, the DUT will operate faster.

Click to see the Shmoo plot