Ilchenko O. Radiomeasuring devices on the basis of optical transducers with frequency output

The research object is the process of converting optical radiation power to frequency signal in sensitive semiconductor structures. The reserch purpose is sensitisation of radiomeasuring devices on the basis of optical transducers due to the electric signal converting to frequency with the use of reactive properties of the transistor structures with negative resistance. Methods are based on the use of mathematical physics equalizations, theory of complex variable functions, theory of nonlinear electric circuits calculation. The theoretical results - the method of optical power measuring is improved on the basis of dependence of reactive properties of transistor structures with negative resistance from optical power. The mathematical models of radiomeasuring devices on the basis of optical transducers are improved for measuring optical radiation power, which take into account the influence of optical power on the elements of devices equivalent circuits on the basis of reactive properties of transistor structures with negative resistance, that enabled to get the convertion functions of optical power to frequency and sensitivity equation. The mathematical model of photosensitive MOSFET, which takes into account the change of electrophysics parameters of device from optical radiation power, is improved and takes into account optical radiation action both from the side of gate and from the side of channel, consequently sensitivity is increased; practical results - the new class of high-sensitive radiomeasuring devices on the basis of optical transducers with a frequency output with the use of reactive properties of the transistor structures with negative resistance is created and the microprocessor-based system for optical power measuring with telecommunication is developed. The results of dissertation research are introduced in research institute of indicator devices "Helium" (Vinnytsia) and in an educational process at the study of the special course the "Semiconductor transducers of information". The application field is the control and measuring systems of meteorological centers.