"New techniques in the design of sonar power amplifiers"

The design techniques, performances, and applications are described for two new types of transistorized sonar switching amplifiers which are used to drive large transducer arrays. The amplifiers are designed to drive complex impedances and are fully protected against shorts and open circuits on the output. Tests proved these amplifiers to be free from the effects of load variations, to have high efficiencies, not to require power interlocking, and to have accurate phase control. A s a result, transducer array designs are no longer limited by the effects of reactive loads on the amplifiers. Switching amplifiers with proper design will now absorb energy from the transducer array.