Accession Number:

AD0901236

Title:

Final Study and Development Report of High Efficiency Sonar Transmitters.

Descriptive Note:

Final rept. 15 Jun 70-1 Jun 72 on Phase 2,

Corporate Author:

BOSE CORP FRAMINGHAM MA

Personal Author(s):

• Veranth, Joseph L.

Report Date:

1972-06-01

Pagination or Media Count:

225.0

Abstract:

The basic issues of high-power audio-frequency amplification are reviewed. A study of a class of high-frequency switching sonar transmitters is presented. Basic design considerations for linear, baseband, switching, and high-frequency switching amplifiers are discussed. The application of presently available solid state devices to power amplification is considered. System and circuit considerations lead to the development of the current-controlled two-state modulation system. The operation of the current-controlled two-state modulation system as an audio power amplifier is analyzed. System characteristics are related to design parameters, and the design of a 1000 VA, 3.5 kHz amplifier is presented. A 500 VA breadboard circuit is used to evaluate this concept. A 1000 VA, 3 kHz current-controlled three-state brassboard amplifier is constructed and tested. This amplifier is used to evaluate various three-state control schemes and the practicality of variable output impedance control. Author

Descriptors:

• *AUDIO AMPLIFIERS
• *POWER AMPLIFIERS
• *TRANSISTOR AMPLIFIERS
• SONAR PROJECTORS
• SONAR PROJECTORS
• ELECTRONIC SWITCHES
• MODULATION
• CONTROL
• ELECTRIC CURRENT
• LOGIC CIRCUITS
• SWITCHING CIRCUITS
• FEEDBACK
• LINEAR SYSTEMS
• HIGH FREQUENCY
• IMPEDANCE MATCHING
• THYRATRONS

Subject Categories:

• Electrical and Electronic Equipment
• Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE