integrator

Розглянуто принцип роботи і блок-схему селектора сейсмічних подій для авто- матичних пристроїв сейсмологічних станцій. Обґрунтовано вибір середовища для моделювання. Наведені результати імітаційного візуального моделювання.

The article deals with the work principles and the block scheme of the seismic actions selector for automated devices of seismological stations. The sphere modeling selection has been substantiated. The results of visual imitation modeling has been presented.

The work is devoted to the problem of signal transducers of high-sensitivity differential temperature sensors. The conducted  studies  have  shown  that  the  scheme  of  the  signal  converter with  the  stabilization  of  the  total  emitter  currents  of  a transistors pair is characterized by a combination of high sensitivity and stability of the steepness of a transformation function. In particular,  as  compared  to  the  circuit with  the  stabilization  of  the  collector  current  of  a  reference  transistor,  the  instability  of steepness is reduced 20-fold.

The results of the pulse-width modulation algorithms analysis are presented in the paper. The following two algorithms are analyzed: pulse-width modulator (PWM) based on the sawtooth waveform generator and PWM based on an integrator and a switch element. Mathematical formulae for designing the tuning parameters of PWM algorithms are presented. An improved PWM algorithm is suggested for a programmable logic controller (PLC) operating with integer variables without a filter of the input signal.