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:
Mar. 09, 1999
Filed:
Nov. 11, 1997
Applicant:
Inventor:
Thomas Heinke, Santa Cruz, CA (US);
Assignee:
Raytek Subsidiary, Inc.,, Santa Cruz, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; G05F / ;
U.S. Cl.
CPC ...
356224 ; 356226 ; 356218 ; 307311 ; 323226 ;
Abstract
A measurement circuit having high dynamic range includes high-gain and low-gain amplifiers connected in parallel. A shunt feedback circuit is activated to prevent the high-gain amplifier from saturating when the magnitude of an input signal exceeds its dynamic range. The output of the high-gain amplifier is utilized to measure small input signals and the output of the low-gain amplifier is utilized to measure large input signals.