An air blowing on-off method of a mobile phone
A technology for switching machines and mobile phones, which is applied to electrical components, telephone communications, branch office equipment, etc.
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[0021] Below in conjunction with accompanying drawing, further illustrate how the present invention is implemented:
[0022] as attached figure 1 , 2 As shown, before blowing air: the voltage on the signal of the microphone 10 is its bias voltage, which is obtained by dividing the battery voltage 11 through two MIC_BIAS voltage dividing resistors 4, and it always exists when the microphone is turned on and off. The value of this voltage needs to meet the minimum value of the high-level input of the mobile phone signal. The content in the dotted box is an optional module, in which the low-pass filter 5 is for more accurate detection of the blowing sound (the blowing sound of the microphone is mainly low-frequency, and the high-frequency components that are not blowing sounds can be filtered out by low-pass filtering ), the NOT gate 6 is used for the mobile phone chip logic high level power-on situation (the NOT gate directly bypasses when the logic level is low). Assuming th...
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