Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1995-03-20
1997-12-23
Wambach, Margaret Rose
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327335, 327336, 327345, 327509, G06G 712
Patent
active
057011010
ABSTRACT:
The present invention is a charge amplifier that directly produces a low impedance voltage output proportional to the charge at its input. The invention consists of an operational amplifier, an input capacitor, a feedback capacitor and a feedback resistor in a parallel configuration. The change amplifier of the present invention can be said to be a differentiator followed by an integrator so that the "noisy" differentiation process precedes the integration and, thus the integration produces less signal degradation.
REFERENCES:
"High Accuracy Analog-Differentiation" Nordlund Nov. 1972 The Review of Sntific Instruments, vol. 43, No. 11, 1699-1700.
IBM Tech. Disc. Bul. "Varicap Compensation of Output Amplifiers" vol. 27 No. 11 Apr. 1985 p. 6734.
George A. Philbrick Researches, Inc. 230 Congress St. Boston 10, Mass. Sep. 20, 1952.
Lindfors Allen J.
Rieger, deceased James L.
Weinhardt Robert
Church Stephen J.
Sliwka Melvin J.
The United States of America as Represented by the Secretary of
Wambach Margaret Rose
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