Digital Equipment Corporation

Instrument Systems Gmbh

Siegbert Sadowski

Florian Schewe

Martin Mangstl

Christian Rixner

Angel Gavrailov

Christian Dotzler

Reto Häring

Methods and devices for the sequential measurement of a plurality of semiconductor-based light sources that operate faster, more accurately and more sensitively than known methods and devices. In accordance with one implementation, a current pulse is applied by a pulsed current source to the low-luminosity light sources consecutively or simultaneously. The emitted light pulse of LED is converted into electric charge carriers by a photodiode, the electric charge carries are added up by means an integrator circuit, the added-together charge carriers are converted by an A/D converter into a digital signal and the digital signal is forwarded to a measurement and control unit.

Device and method for measuring semiconductor-based light sources

In a method and a circuit arrangement for recovering a digital signal having digital pulses from a recorded signal which is read by a read head of a storage device, the shape of the recorded signal, being a reproduction of the digital signal, is compared with the shape of a normal read signal previously stored as a comparison pattern of voltage values. In the case of agreement, which is given on the presence of a certain correlation, the recorded signal is evaluated as a digital pulse and otherwise on non-agreement as a digital non-pulse.

Method and apparatus for recovering digital signals from recorded

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Irsee, Germany

Siegbert Sadowski