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:
Apr. 17, 2001
Filed:
May. 04, 1999
Applicant:
Inventor:
Markus Zanetti, Frauenfeld, CH;
Assignee:
K.K. Holding AG, Winterthur, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 1/00 ; H01L 4/104 ;
U.S. Cl.
CPC ...
H03F 1/00 ; H01L 4/104 ;
Abstract
A circuitry for measuring piezoelectric signals for a piezotransducer/charge amplifier combination with a range capacitor including a voltage divider with a switch element providing a feedback signal to the measuring input of a charge amplifier. The switching element is controlled by a pulse generator for zeroing. The range capacitors charge to a certain class and voltage at the commencement of the measuring. An adjustment of the range of the range capacitor is provided by a second voltage divider.