Some supplementations

unifications

and simplifications of the problem of optimum band-width of a filter approximately matched to high-frequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular high-frequency pulse

the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular high-frequency signal was discussed and the formula for calculating the optimum band-width of the system was obtained.For the case of pulse trains with uniform amplitudes

simplification and unification of some results of the other authors were made

it was pointed out that there exists a simple relation between the optimum value of attenuation of the delayed feedback system with unlimited band-width and the optimum teeth-width of a comb filter with single-tuned characteristic of the teeth. The comparison between these two systems was made by the use of the data of the other authors.For the case of rectangular pulse trains with non-uniform amplitudes

the accumulation of the rectangular pulse trains with trapezoidal envelope by the delayed feedback system with finite bandwidth was discussed

and formula of the signal to noise ratio at the output terminals was obtained. For finding the optimum bandwidth of the delayed feedback system

some numerical calculations were made

and curves of the signal to noise ratio with respect to the band-width were plotted. From these curves we found that in this case there exists an optimum band-width of the system

the value of which is wider then the optimum band-width of the system in the case of accumulation of rectangular pulse trains with uniform amplitudes.