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:
Sep. 10, 2002
Filed:
Feb. 02, 2001
Applicant:
Inventors:
Vyacheslav D. Kats, East Rockaway, NY (US);
Arnold S. Gordon, Woodmere, NY (US);
Assignee:
Circuits & Systems Inc., East Rockaway, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01G 3/14 ; G01G 3/16 ;
U.S. Cl.
CPC ...
G01G 3/14 ; G01G 3/16 ;
Abstract
A weighing apparatus includes a SAW oscillator and a “push oscillator” to force the SAW oscillator into a desired mode of operation. A SAW temperature oscillator and a thermistor are also provided. The frequency of the “push oscillator” is made immune to temperature changes by generating it via a mixer mixing the SAW temperature oscillator with an adjustable fixed frequency oscillator. Long term stability of the SAW temperature oscillator is achieved by periodic calibration with the thermistor.