Communications – electrical: acoustic wave systems and devices – Receiver circuitry
Patent
1993-09-23
1995-04-18
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Receiver circuitry
367901, H04B 106
Patent
active
054084423
ABSTRACT:
Disclosed are a filtered hydrophone circuit and a method of filtering hydrophone output signals. The circuit, in its most elemental embodiment comprises: (1) a hydrophone having first and second output conductors, the hydrophone producing an electrical signal of varying frequency, (2) an operational amplifier having first and second inputs and an output, the first amplifier input coupled to the first hydrophone output conductor, (3) a first resistor coupling the amplifier output to a second resistor, the second resistor further coupled to an electrical ground and (4) a capacitor coupling the second amplifier input to a point between the first and second resistors to thereby define a feedback path between the amplifier output and the second amplifier input for portions of the hydrophone electrical signal above a selected cutoff frequency, an output signal of the amplifier thereby substantially freed of the portions of the output signal below the selected cutoff frequency.
REFERENCES:
patent: 2614143 (1952-10-01), Williams
patent: 2708742 (1955-05-01), Harris
patent: 2782059 (1957-02-01), Stranberg
patent: 2900536 (1959-08-01), Palo
patent: 3177016 (1965-04-01), Holmgren
patent: 3258739 (1966-06-01), Hurley
patent: 3333236 (1967-07-01), Schloss
patent: 3418624 (1968-12-01), Massa
patent: 3739326 (1973-06-01), Kerr et al.
patent: 3764848 (1973-10-01), Berlincourt
patent: 3996553 (1976-12-01), Siems et al.
patent: 4012649 (1977-03-01), Cook et al.
patent: 4092629 (1978-05-01), Siems et al.
patent: 4160229 (1979-07-01), McGough
patent: 4204188 (1980-05-01), Weichart et al.
patent: 4437689 (1984-03-01), Goebel et al.
patent: 4491939 (1985-01-01), Carpenter
patent: 4733379 (1988-03-01), Lapetina et al.
patent: 4736969 (1988-04-01), Fouts
patent: 4782470 (1988-11-01), Poturnicki et al.
patent: 4787069 (1988-11-01), Beauducel et al.
patent: 4819216 (1989-04-01), Fraioli
patent: 4901287 (1990-02-01), Hathaway et al.
patent: 4951265 (1990-08-01), Buckles
patent: 5008581 (1991-04-01), Kumada et al.
Schilling et al., Electronic Circuits, 1979, pp. 355-357.
Profitt, Jack M "A History of Innovation in Marine Seismic Data Acquisition", Geophysics: The Leading Edge of Exploration, p. 24 (Mar. 1991).
Pihulic Daniel T.
Whitehall Corporation
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