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:
Aug. 11, 2015
Filed:
Feb. 25, 2014
Applicant:
Linear Technology Corporation, Milpitas, CA (US);
Inventor:
Petrus M. Stroet, Santa Cruz, CA (US);
Assignee:
Linear Technology Corporation, Milpitas, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/48 (2006.01); H03H 7/21 (2006.01); H04B 15/02 (2006.01);
U.S. Cl.
CPC ...
H03H 7/21 (2013.01); H04B 15/02 (2013.01);
Abstract
A poly-phase filter receives inphase input signals I and Ī and quadrature input signals Q and, and provides inphase output signals Iandand quadrature output signals Qand. The capacitance of each variable capacitor connected to the terminals providing inphase output signals Iandis and the capacitance of each variable capacitor connected to the terminals providing quadrature output signalsand Q, are different in value, and preferably by twice a predetermined value. This is because adjustment to the capacitance values may be made to each set of variable capacitors by the predetermined value.