VAD DETECTION MICROPHONE AND METHOD OF OPERATING THE SAME
First Claim
1. A microphone, the microphone comprising:
- a microelectromechanical system (MEMS) circuit that is configured to convert a voice signal into an electrical signal,an integrated circuit coupled to the MEMS circuit that is configured to receive the electrical signal;
wherein the integrated circuit and the MEMS circuit receive an external clock signal from an external host, the external clock signal being effective to cause the MEMS circuit and integrated circuit to operate in full system operation mode during a first time period and in a voice activity mode of operation during a second time period, the voice activity mode having a first power consumption and the full system operation mode having a second power consumption, the first power consumption being less than the second power consumption, wherein the integrated circuit is configured to generate an electrical interrupt signal upon a detection of voice activity, and send the electrical interrupt signal to the host, and wherein absence of the external clock signal causes the microphone to enter a voice activity detection mode;
wherein the integrated circuit includes a delay buffer that is configured to buffer data included in the electrical signal in order to provide a time delay latency for the integrated circuit to perform further processing.
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Accused Products
Abstract
A microphone includes a microelectromechanical system (MEMS) circuit and an integrated circuit. The MEMS circuit is configured to convert a voice signal into an electrical signal, and the integrated circuit is coupled to the MEMS circuit and is configured to receive the electrical signal. The integrated circuit and the MEMS circuit receive an external clock signal from an external host, and the external clock signal is effective to cause the MEMS circuit and integrated circuit to operate in full system operation mode during a first time period and in a voice activity mode of operation during a second time period. The voice activity mode has a first power consumption and the full system operation mode having a second power consumption. The first power consumption is less than the second power consumption. The integrated circuit is configured to generate an electrical interrupt signal upon a detection of voice activity, and send the electrical interrupt signal to the host. Absence of the external clock signal causes the microphone to enter a voice activity detection mode. The integrated circuit includes a delay buffer.
26 Citations
14 Claims
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1. A microphone, the microphone comprising:
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a microelectromechanical system (MEMS) circuit that is configured to convert a voice signal into an electrical signal, an integrated circuit coupled to the MEMS circuit that is configured to receive the electrical signal; wherein the integrated circuit and the MEMS circuit receive an external clock signal from an external host, the external clock signal being effective to cause the MEMS circuit and integrated circuit to operate in full system operation mode during a first time period and in a voice activity mode of operation during a second time period, the voice activity mode having a first power consumption and the full system operation mode having a second power consumption, the first power consumption being less than the second power consumption, wherein the integrated circuit is configured to generate an electrical interrupt signal upon a detection of voice activity, and send the electrical interrupt signal to the host, and wherein absence of the external clock signal causes the microphone to enter a voice activity detection mode; wherein the integrated circuit includes a delay buffer that is configured to buffer data included in the electrical signal in order to provide a time delay latency for the integrated circuit to perform further processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for converting voice signals into electrical signals, the system comprising:
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an external host; a microphone, the microphone comprising; a microelectromechanical system (MEMS) circuit that is configured to convert a voice signal into an electrical signal, an integrated circuit coupled to the MEMS circuit that is configured to receive the electrical signal; wherein the integrated circuit and the MEMS circuit receive an external clock signal from the external host, the external clock signal being effective to cause the MEMS circuit and integrated circuit to operate in full system operation mode during a first time period and in a voice activity mode of operation during a second time period, the voice activity mode having a first power consumption and the full system operation mode having a second power consumption, the first power consumption being less than the second power consumption, wherein the integrated circuit is configured to generate an electrical interrupt signal upon a detection of voice activity, and send the electrical interrupt signal to the host, wherein absence of the external clock signal causes the microphone to enter a voice activity detection mode; wherein the integrated circuit includes a delay buffer that is configured to buffer data included in the electrical signal in order to provide a time delay latency for the integrated circuit to perform further processing. - View Dependent Claims (11, 12, 13, 14)
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Specification