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. 22, 2016
Filed:
Feb. 06, 2015
Koichi Maezawa, Toyama, JP;
Koichiro Tanoue, Tokyo, JP;
Koichi Maezawa, Toyama, JP;
Koichiro Tanoue, Tokyo, JP;
Kabushiki Kaisha Audio-Technica, Tokyo, JP;
National University Corporation University of Toyama, Toyama, JP;
Abstract
A digital microphone includes: a cavity resonator operatable in a micrometer, millimeter, or electromagnetic waveband, the cavity resonator having a metal wall including a conductive membranethat vibrates in response to incident acoustic waves and converts the shift of the membraneinto a resonance frequency of the cavity resonator; an FM-signal generator that modulates the resonance frequency of the cavity resonator in response to the shift of the membraneand outputs FM signals from the metal wall other than the membrane; and a ΔΣ-modulated-signal generator that generates ΔΣ-modulated signals from the FM signals. The FM-signal generator includes a slot, a micro-strip line, and a negative resistive element. The ΔΣ-modulated-signal generator includes an edge detector