The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 1997
Filed:
Mar. 20, 1995
Robert Weinhardt, Ridgecrest, CA (US);
Allen J Lindfors, Ridgecrest, CA (US);
James L Rieger, deceased, late of Ridgecrest, CA (US);
The United States of America as Represented by the Secretary of the Navy, Washington, DC (US);
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.