Back to results
US 11,388,534 B2Granted
Electroacoustic convertor, audio device and audio method thereof
AssigneexMEMS Labs, Inc.
InventorJemm Yue Liang
Life of this patent
Estimating the term…
Abstract
An audio device includes an electroacoustic convertor and a differential amplifier. The electroacoustic convertor has a first output terminal and a second output terminal. A first polarity of a first capacitance variation corresponding to the first output terminal is opposite to a second polarity of a second capacitance variation corresponding to the second output terminal. The first capacitance variation and the second capacitance variation are associated with a magnitude of acoustic pressure. The differential amplifier has a first input terminal coupled to the first output terminal and a second input terminal coupled to the second output terminal.
Claims13
An audio device, comprising:
- an electroacoustic convertor, having a first output terminal and a second output terminal, wherein a first polarity of a first capacitance variation corresponding to the first output terminal is opposite to a second polarity of a second capacitance variation corresponding to the second output terminal, wherein the first capacitance variation and the second capacitance variation are associated with a magnitude of acoustic pressure, wherein the electroacoustic convertor comprises:
- at least one first sensing capacitor, wherein each of the at least one first sensing capacitor comprises:
- a first upper electrode;
- a first lower electrode, wherein the first capacitance variation is associated with a first distance between the first upper electrode and the first lower electrode;
- and
- at least one first spacer, configured to separate the first upper electrode and the first lower electrode;
- and
- at least one second sensing capacitor, wherein each of the at least one second sensing capacitor comprises:
- a second upper electrode, wherein a first tip vertex of the first upper electrode is aligned to a second tip vertex of the second upper electrode;
- a second lower electrode, wherein the second capacitance variation is associated with a second distance between the second upper electrode and the second lower electrode;
- and
- at least one second spacer, configured to separate the second upper electrode and the second lower electrode;
- and
- a differential amplifier, having a first input terminal coupled to the first output terminal and a second input terminal coupled to the second output terminal.
11 more elements
An electroacoustic convertor, comprising:
- an upper electrode;
- a lower electrode;
- and
- at least one spacer, configured to separate the upper electrode and the lower electrode, wherein each of the at least one spacer is disposed at a reentrant vertex or a tip vertex of the upper electrode, wherein the upper electrode, or a layer of the lower electrode has permanent electric charges.
1 more element
An audio device, comprising:
- an electroacoustic convertor, having a first output terminal and a second output terminal, wherein a first polarity of a first capacitance variation corresponding to the first output terminal is opposite to a second polarity of a second capacitance variation corresponding to the second output terminal, wherein the first capacitance variation and the second capacitance variation are associated with a magnitude of acoustic pressure, wherein the electroacoustic convertor comprises:
- at least one first sensing capacitor, wherein each of the at least one first sensing capacitor comprises:
- a first upper electrode;
- a first lower electrode, wherein the first capacitance variation is associated with a first distance between the first upper electrode and the first lower electrode;
- and
- at least one first spacer, configured to separate the first upper electrode and the first lower electrode, wherein each of the at least one first spacer is disposed at a first reentrant vertex of the first upper electrode;
- and
- at least one second sensing capacitor, wherein each of the at least one second sensing capacitor comprises:
- a second upper electrode;
- a second lower electrode, wherein the second capacitance variation is associated with a second distance between the second upper electrode and the second lower electrode;
- and
- at least one second spacer, configured to separate the second upper electrode and the second lower electrode, wherein each of the at least one second spacer is disposed at a second tip vertex of the second upper electrode;
- and
- a differential amplifier, having a first input terminal coupled to the first output terminal and a second input terminal coupled to the second output terminal.
11 more elements
Dependencies are inferred from the claim text.