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. 09, 2005
Filed:
Nov. 13, 2000
Applicants:
Tapio Mantysalo, Littoinen, FI;
Nina Muurinen, Preitila, FI;
Karl-erik Gustafsson, Turku, FI;
Inventors:
Assignee:
Nokia Mobile Phones Ltd., Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R003/00 ; H04M001/00 ;
U.S. Cl.
CPC ...
Abstract
A microphone structure comprising a microphone (M) and an electro-static discharge protector (ZD) placed close to microphone capsule (), preferably inside it. Further the structure comprises within the microphone capsule an e.g. ladder-type filter having parallel capacitors (C, C, C) and series resistors or coils (R, Z) protecting the microphone from radio frequency disturbances. Structure parts may be on same circuit board or in same integrated circuit (IC). Structure is less susceptible to RF disturbances than known structures and its production costs are lower.