首页>
外国专利>
Power supply method for avoiding audio noise and power supply apparatus for avoiding audio noise
Power supply method for avoiding audio noise and power supply apparatus for avoiding audio noise
展开▼
机译:避免音频噪声的电源方法和避免音频噪声的电源设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
A power supply apparatus (10) includes a voltage input side (102), a power switch circuit (104), a voltage output side (106), a pulse width modulation signal generating circuit (108) and a burst frequency detection circuit (110). According to a pulse width modulation signal (114), the pulse width modulation signal generating circuit (108) controls the power switch circuit (104), so that the power supply apparatus (10) enters a burst mode. The burst frequency detection circuit (110) detects a burst frequency of the power switch circuit (104). The burst frequency detection circuit (110) informs the pulse width modulation signal generating circuit (108) that the burst frequency is in an audio frequency range if the burst frequency is in the audio frequency range. The power supply apparatus (10) leaves from the burst mode to avoid audio noise.
展开▼