Earphone interface circuit and electronic device provided with the same

An electronic device and earphone interface technology, applied in transducer circuits, earpiece/earphone accessories, electrical components, etc., can solve the problems of lack of universality, three-channel earphones and four-channel earphones cannot be applied to electronic devices, etc.

Active Publication Date: 2012-05-16
东莞市桔外人电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the above-mentioned three-channel earphones and four-channel earphones suitable for MP3 and computers cannot be applied to the above-mentioned electronic devices, which is not universal

Method used

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  • Earphone interface circuit and electronic device provided with the same
  • Earphone interface circuit and electronic device provided with the same
  • Earphone interface circuit and electronic device provided with the same

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] see Figure 4 , the preferred embodiment of the present invention provides an electronic device 100 that is compatible with different types of earphones. The headset can be a three-channel headset or a four-channel headset. In this embodiment, for the convenience of description, the figure 2 The four-channel earphone whose contact structure from outside to inside is the left channel contact REC-L, the right channel contact REC-R, the microphone contact MIC and the ground contact GND is defined as the first type four-channel earphone; image 3 The four-channel earphone whose contact structure from the outside to the inside is the left channel contact REC-L, the right channel contact REC-R, the ground contact GND and the microphone contact MIC is defined as the second type of four-channel earphone.

[0018] The electronic device 100 includes an earphone interface circuit 11 , a detection port 12 , a control port 13 , a judgment circuit 14 , a receiving port 15 and a vo...

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PUM

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Abstract

The invention provides an earphone interface circuit and an electronic device provided with the earphone interface circuit. The earphone interface circuit comprises an earphone jack socket and a shift switch, wherein the shift switch comprises a first switch and a second switch, one end of a stationary contact of the first switch is connected to a second switching spring piece, and the other end of the stationary contact of the first switch is grounded; a movable contact of the first switch is connected to a first power supply, and a node is formed; stationary contacts of the second switch are respectively connected to a first switching spring piece and the node, and a movable contact of the second switch is grounded; when earphones are inserted, a left sound channel spring piece, a right sound channel spring piece, the first switching spring piece and the second switching spring piece are respectively connected to corresponding connection points on the earphones. Types of the earphones can be judged by means of detecting a voltage of the node, and switching of the shift switch can be correspondingly controlled.

Description

technical field [0001] The invention relates to an earphone interface circuit compatible with different types of earphones and an electronic device having the earphone interface circuit. Background technique [0002] At present, the audio interface used in MP3 and computer is generally a headphone jack with a diameter of 3.5mm, and the headphones used in conjunction with the headphone jack with a diameter of 3.5mm are generally divided into two types: three-section type and four-section type. The three-section headphones are also called three-channel headphones, please refer to figure 1 , and its structure is defined as the left channel contact REC-L, the right channel contact REC-R and the ground contact GND from the outside to the inside, which are used to transmit the left channel audio signal and the right channel signal. see figure 2 and image 3 , The four-section earphone is also called the four-channel earphone. Specifically, any one of the front and rear contac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/00
Inventor 张若坚
Owner 东莞市桔外人电子有限公司
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