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:
Feb. 20, 2018
Filed:
Mar. 24, 2016
Applicant:
Sijie Chi, Shenzhen, CN;
Inventor:
Sijie Chi, Shenzhen, CN;
Assignee:
AAC TECHNOLOGIES PTE. LTD., Singapore, SG;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 9/08 (2006.01); H04R 19/04 (2006.01); H01F 17/00 (2006.01); H01P 1/203 (2006.01); H04R 3/00 (2006.01);
U.S. Cl.
CPC ...
H04R 19/04 (2013.01); H01F 17/00 (2013.01); H01P 1/20345 (2013.01); H04R 3/00 (2013.01); H04R 3/007 (2013.01);
Abstract
A microstrip filter is provided in the present disclosure. The microstrip filter includes a substrate having a first surface and a second surface opposite to each other, a first spiral metal line formed on the first surface of the substrate, and a second spiral metal line formed on the second surface of the substrate. At least part of the first spiral metal line overlaps and is coupled to the second spiral metal line for forming a filter capacitor. The present disclosure also provides a microphone device using the microstrip filter.