Current source preamplifier for hydrophone beamforming
US5132940A · kind A · utility
2Cited by
0References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/348
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A preamplifier for beamforming hydrophone signals of a sonar array. The invention uses an amplifier that provides a current-source type of output for driving the beamforming network, thus avoiding the substantial signal loss inherent in using voltage-source amplification. To obtain the stability of gain required in this type of operation, the invention employs a negative feedback system that can be easily adjusted by choice of resistors to accommodate desired levels of shading and signal equalization. The advantages provided are savings in cost, reduction in size and power requirements and improved in signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.