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:
Oct. 12, 2021
Filed:
Feb. 11, 2020
Applicant:
Realtek Semiconductor Corporation, Hsinchu, TW;
Inventors:
Assignee:
REALTEK SEMICONDUCTOR CORPORATION, Hsinchu, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/01 (2006.01); H03F 1/26 (2006.01); H03F 1/02 (2006.01); H03F 3/217 (2006.01);
U.S. Cl.
CPC ...
H03F 1/26 (2013.01); H03F 1/0205 (2013.01); H03F 3/217 (2013.01);
Abstract
A filter includes M filter circuits. The M filter circuits are sequentially cascaded from an input terminal to an output terminal, in order to generate an output signal according to an input signal, in which M is a positive integer greater than or equal to 2. The M filter circuits include at least one first filter circuit and at least one second filter circuit. Each of the at least one first filter circuit is set to be an active filter circuit, and each of the at least one second filter circuit is set to be a passive filter circuit.