Hydrophone preamplifier and calibration circuit

Details Hydrophone preamplifier and calibration circuit Hydrophone preamplifier and calibration circuit

1978-11-20

1980-07-15

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330 2, 330 59, 330202, 330300, 330308, H03F 1700, H03F 316

Patent

active

042130999

ABSTRACT:
Calibration means, including an optiosolator, for a hydrophone preamplifier hich couples to a remote DC supply source and a remote load through a long, two-wire cable. The output signal of the optoisolator is fed to the amplifier in series with the hydrophone output signal, the input to the optoisolator being an AC calibration signal. In an array of preamplifiers, the same calibration signal is fed to all the preamplifiers by connecting the optoisolators in series with each other and the source of the AC calibration signal.

REFERENCES:
patent: 3501711 (1970-03-01), Moran
patent: 3602830 (1971-08-01), Hurd
patent: 4009447 (1977-02-01), Wolf et al.
patent: 4013992 (1977-03-01), Dewberry et al.
patent: 4126830 (1978-11-01), Schade

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