Floating shunt seismic amplifier

Details Floating shunt seismic amplifier Floating shunt seismic amplifier

1979-01-19

1980-12-30

Birmiel, Howard A.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

330258, 330 84, 333 12, 367 65, 367135, G01V 138

Patent

active

042427410

ABSTRACT:
A differential amplifier circuit comprised of two operational amplifiers for use as a differential output and differential input amplifier for any two-terminal impedance transfer function. The input impedance is very low between the two input terminals, yet it is very high between either input terminal and the common or ground terminal, thus giving this amplifier many of the desirable characteristics of a transformer-coupled amplifier. High common mode voltage rejection ratios can be achieved even when moderate differential imbalances exist in the input and feedback networks due to the unique balancing feature of the circuit.

REFERENCES:
patent: 3223940 (1965-12-01), Early et al.
patent: 3469255 (1969-09-01), Hoffman et al.
patent: 3566298 (1971-02-01), Stevens
patent: 3939468 (1976-02-01), Mastin
patent: 4088961 (1978-05-01), Ashley
"AF120 Generalized Impedance Converter", 1975, National Semiconductor Corp. Publication.

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