With the virtual enforcement of the required boundary condition (BC) at the end of a slot antenna, the area occupied by the resonant antenna can be reduced. To achieve the required virtual BC, the two short circuits at the end of the resonant slot are replaced by some reactive BC, including inductive or capacitive loadings. The application of these loads is shown to reduce the size of the reson...

This paper presents electronic ballast with dimming capability supplying a 32 W fluorescent lamp. The electronic ballast is a self-oscillating driving circuit with an additional circuit responsible for dimming the fluorescent lamp based on a signal from a lighting dependent resistor. This luminous sensor measures the luminous flux level and set the lamp power by the voltage gain variation of th...

Abstract This application note is a guide for the selection of high voltage power BJTs (Bipolar Junction Transistors), and provides a detailed description of the operation of a horizontal deflection circuit by examining its resonant mode operation. Some recommendations for reducing the case temperature of the BJT are suggested by studying its ZVS (zero voltage switching) operation, and its inhe...

This paper describes a secondary side resonant converter with particular suitability to step up and high power applications. A description of the basic circuit is followed by a detailed description and some important developments building upon the basic circuit, including inversion and bi-directional configurations. Efficiency is very good (≈94%) as a result of the zero voltage switching and ze...

Time-dependent mode-coupling theory is used to analyze a type of resonant add/drop filter based on the excitation of degenerate symmetric and antisymmetric modes. Flat-top transfer functions are achieved with higher order filters that utilize multiple resonator pairs, designed to satisfy the degeneracy conditions. The resulting analytic expressions lead to an equivalent circuit and the transfer...

This article describes the ways to preserve resonant mode in biparametric circuits with distributed parameters and studies effect of changes circuit power supply on mode. During moving part’s movement sensor due influence magnetic resistance steel part circuit, law change electrical inductance (distribution flux long conductors) differs from linear one.