Stroboscopic photometer

Details Stroboscopic photometer Stroboscopic photometer

1996-05-24

1997-07-08

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250330, 2503581, G01N 2572

Patent

active

056464061

ABSTRACT:
An apparatus for collecting photons emitted by hot spots in an integrated circuit. Means are provided for intermittently energizing the circuit. A photon receptor detects the photons emitted by the circuit, and produces a photon signal. A shutter, disposed between the circuit and the photon receptor, is opened by a controller when the circuit is not energized, and closed by the controller when the circuit is energized. By thus closing the shutter when the circuit is energized, the photon receptor is shielded from receiving the photons generated during the refresh cycle of the energized device, and is able to detect photons from a defect in the circuit over a period of time that is longer than the refresh rate of the circuit.

REFERENCES:
patent: 5302830 (1994-04-01), Shivanandan
patent: 5396068 (1995-03-01), Bethea

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