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:
Jun. 28, 1994
Filed:
May. 18, 1992
Applicant:
Inventors:
Paul T Bennett, Phoenix, AZ (US);
David F Mietus, Tempe, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01P / ;
U.S. Cl.
CPC ...
324661 ; 324684 ; 7351 / ; 328162 ;
Abstract
A detection circuit for sensing small capacitive changes has been provided. The detection circuit includes a dummy integrator stage that compensates for a voltage step that results from charge injection due to an existing switch in a first integrator stage. As a result, the detection circuit is insensitive to switch injection and amplifier offset voltages.