Abstract: A light emitting diode assembly consisting of separate dies, individually mounted or commonly packaged into one assembly providing an energy spectrum compliant with a night vision imaging system standard, such as NVIS Green A class A. The light emitting diode combination or assembly does not require any external filtering and/or fluorescent material to achieve the NVIS Green A class A chromaticity and radiance requirements. An optical filter absorbing part of visible energy to improve radiance performance. A conformal coating including an absorbing agent for filtering small infrared emissions may be used for improving compliance performance. Use of light emitting diode with conformal coating with absorbing for compliance to NVIS Green B, class A.

Abstract: A temperature compensation technique is disclosed which allows to obtain a compensated clock signal. The temperature compensation technique comprises the use of a thermal model of the oscillator with a temperature sensor in order to accurately compute the oscillator frequency, irrespective of time-variations and rates.