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Adaptive vibration damping mechanism to eliminate acoustic noise in electronic systems
专利权人:
发明人:
David A. Hardell
申请号:
US13861596
公开号:
US09208774B2
申请日:
2013.04.12
申请国别(地区):
US
年份:
2015
代理人:
摘要:
A system to eliminate acoustic noise caused by a first Multi-Layer Ceramic Capacitor (MLCC) array positioned on a printed circuit board (PCB) is disclosed. The first MLCC array generates a first vibration responsible for the acoustic noise in response to receiving a varying input voltage. A third MLCC array senses the first vibration and generates a feedback signal. An adaptive filter then uses the feedback signal to generate an output signal that is used by a second MLCC to generate a second vibration that acts as a counter to dampen the first vibration. Because the input voltage signal is varying in time, the adaptive filter continually samples the varying input voltage and the feedback signal to generate the output signal that minimizes the acoustic noise. The second and third MLCC arrays are selectively positioned and oriented on the PCB for optimum performance.
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