Double contact mobile phone headphone socket
A headphone socket and dual-contact technology, applied in the direction of earpieces/headphone accessories, etc., can solve the problems of large size of headphone sockets, inability to recognize headphone insertion, low versatility, etc., and achieve the effect of solving impedance matching and bias voltage problems.
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[0026] In order to illustrate the idea and purpose of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] See Figure 4 as shown, Figure 4 It is the schematic diagram of the circuit using the low level detection of the male head in the present invention. The invention provides a low-level detection circuit for the male earphone of a mobile phone, which includes an earphone socket JK601 and a mobile phone CPU. Pin 2 is the microphone pin MIC, pin 3 is the right channel pin MP3R, pin 5 is the left channel pin MP3L, pin 4 is the signal detection pin, and the signal detection pin is connected to the detection signal input of the mobile phone CPU through the reserved resistor R63 terminal HEAD_DET, and the reserved resistor R63 is connected to the power supply through a current limiting resistor; the right channel pin MP3R is connected to the audio signal input terminal XMP3...
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