Kryzhanovskyi V. Methods of improving the noise and power characteristics of microwave analog integrated circuits operating in switching modes

Object - processes of energy and signal transformation in key amplification, generation and transformation devices based on field transistors. Aim - to upgrade energy and noise parameters of low-energy transmitter/receiver units based on CMOS technology by using off-again modes. Subject - approaches and methods of upgrading energy parameters and noise level reduction in self-excited oscillators, amplifiers and mixers in high-frequency and microwave equipment, including in integrated form. Methods - semiconductor devices theories, methods of numerical analysis and experimental research of device model characteristics. Results - development of the method to form a transmitter microwave spectrum featuring generation of a triangular radio frequency pulse due to the key control of output signal of microwave range self-excited oscillator; development of the method to produce exponential transfer characteristic of voltage converter using approximation formula with linear argument; development of a new design and improvement of the parameter determination method by means of changing feedback ring; for the first time there were proved and calculated the parameters of double-balanced mixer using CMOS transistors with differential operation under 0.18 m technology as a subharmonic mixer with a low level of flicker noise. Implementation - in scientific research activities at IRE NASU, in academic activities at DonNU (Vinnytsia). Application - development of energy-efficient microwave microcircuits