Accession Number : ADA282299

Title :   The Optimum Transfer Characteristic of an Amplifier for an Individual Pulse.

Corporate Author : ARMY ENGINEER RESEARCH AND DEVELOPMENT LABS FORT BELVOIR VA

Report Date : 14 OCT 1949

Pagination or Media Count : 96

Abstract : The optimum transfer characteristic of an amplifier for an individual pulse is defined as that transfer characteristic for which the ratio of the peak of the output signal to the root mean square value of the output noise is greater than for any other transfer characteristic. An optimum network is understood to be one with an optimum transfer characteristic. The optimum transfer characteristic is expressed as a function of the Fourier representation of the input pulse and the following results are derived therefrom: (l) The length of the optimum output pulse is twice that of the input pulse. (2) The shape of the optimum output pulse is symmetrical in time, i.e., the function representing the optimum output pulse is an even function of time. (3) The peak of the optimum output pulse is proportional to the square root of the total energy delivered to the amplifier input resistance by the input pulse. (4) The optimum transfer characteristic for a pulse of finite length is realizable by a physical network if its delay time is not smaller than half the pulse length.

Descriptors :   *PULSE AMPLIFIERS, AMPLIFIERS, DELAY, NETWORKS, NOISE, PULSES, RESISTANCE, SHAPE, SIGNALS, SQUARE ROOTS, FOURIER TRANSFORMATION, SIGNAL TO NOISE RATIO.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE