Title:
PHANTON POWER OPTICAL MICROPHONE SYSTEM
Document Type and Number:
WIPO Patent Application WO2002076142
Kind Code:
A3
Abstract:
The invention provides a noise suppresson phantom power optical microphone system having an optical microphone consisting of a light source having an input terminal, a membrane and a photodetector having an outpout terminal, the system including a signal amplifier connectable to the outpout terminal of the photodector; a processing amplifier connected to the output of the signal amplifier for providing high amplification to relatively weak input signals and low amplification to relatively strong input signals; a first circuit connecting the input terminal of the light source to a phantom power source; a second circuit connecting the outpout of the signal amplifier to the first circuit, and a third circuit connecting the output of the processing amplifier to the first circuit.
Inventors:
PARITSKY ALEXANDER (IL)
SMIRNOV SERGEI (IL)
SMIRNOV SERGEI (IL)
Application Number:
PCT/IL2002/000192
Publication Date:
March 18, 2004
Filing Date:
March 10, 2002
Export Citation:
Assignee:
PHONE OR LTD (IL)
PARITSKY ALEXANDER (IL)
SMIRNOV SERGEI (IL)
PARITSKY ALEXANDER (IL)
SMIRNOV SERGEI (IL)
International Classes:
H04R23/00; (IPC1-7): H04R23/00
Domestic Patent References:
| WO1989012375A1 | 1989-12-14 |
Foreign References:
| GB2303991A | 1997-03-05 | |||
| US5673327A | 1997-09-30 |
Download PDF:
Previous Patent: MAGNETOSTRICTIVE ACTUATOR
Next Patent: SOLID ANGLE CROSS-TALK CANCELLATION FOR BEAMFORMING ARRAYS
Next Patent: SOLID ANGLE CROSS-TALK CANCELLATION FOR BEAMFORMING ARRAYS