AMPLIFICATORE A GUADAGNO VARIABILE NEL TEMPO ED IMPIANTO SONAR CHE LO COMPRENDE

摘要

A time varying gain amplifier for a side scanning sonar system having a predetermined gain versus time relationship is disclosed. The gain is substantially proportional to the square of the elapsed time measured from the last sonar pulse initiating trigger signal. The amplifier in one embodiment employs a series connection of two amplifiers, each of which has a gain which varies linearly with the elapsed time.