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:
Nov. 16, 1993
Filed:
Apr. 06, 1992
Applicant:
Inventors:
James G Mittel, Boynton Beach, FL (US);
John J Parkes, Jr, Boynton Beach, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H03H / ;
U.S. Cl.
CPC ...
455313 ; 307520 ; 333215 ; 34082544 ; 455339 ;
Abstract
A filter (13) for providing temperature compensation for the quality factor thereof comprises transconductance amplifiers (23 and 24) in a gyrator configuration coupled between an input node (21) and an output node (22). A parallel capacitor (25) is coupled between the input node (21) and a supply voltage, and a parallel resistor (26) is coupled between the input node (21) and the supply voltage. A series capacitor (27) is coupled to the output node (22), and a series resistor (28) is coupled between the second capacitor (27) and the supply voltage.