A main power supply continuously provides a current to a power input terminal of an integrated circuit device under test (DUT). The DUT's demand for current at the power input terminal temporarily increases during state changes in synchronous logic circuits implemented within the DUT. To limit variation...http://www.google.com.au/patents/US6456103?utm_source=gb-gplus-sharePatent US6456103 - Apparatus for reducing power supply noise in an integrated circuit
