Method and apparatus for iddq measuring

摘要

An IDDQ test is applied to an electronic circuit ( 16 ). A power supply unit supplies power supply current to the electronic circuit. The output impedance of the power supply unit is adjusted to a value selected for the electronic circuit, the value having been selected so that a resonance circuit ( 14 ) that comprises a connection between the power supply unit and the electronic circuit is substantially critically dampened. The current sense element ( 18 ) that is used to measure IDDQ current is coupled between an external power supply and a supply input of the power supply unit, so that the current sense element does not affect the output impedance.