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. 29, 1992
Filed:
Jun. 24, 1991
Applicant:
Inventor:
John E Hanna, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; G06G / ;
U.S. Cl.
CPC ...
328127 ; 307490 ; 307494 ; 328149 ;
Abstract
A differentiator circuit is provided with a subtracter circuit connected to the input and output of the final stage of a main signal processing filter, the latter of which processes an input signal for providing a filtered output signal. The difference between the input and output signals of the final stage of the main signal processing filter provides a differentiated output signal having the same natural frequency and damping factor as the filtered output signal.