Electronic equipment and earphone detection circuit, method and device
A technology of earphone detection and circuit, which is applied in transducer circuits, electrical components, sensors, etc., can solve the problems of false detection of earphones, and achieve the effects of accurate insertion/extraction, simple structure and wide application
Active Publication Date: 2015-06-03
SPREADTRUM COMM (SHANGHAI) CO LTD
View PDF6 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The technical solution of the present invention solves the problem of false detection in the existing solution for detecting earphones
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] The technical solution of the present invention provides an earphone detection circuit, comprising: a first detection unit adapted to detect a signal at a first detection end to output a first detection signal; the first detection end is adapted to be connected to a first interface of an earphone, so The voltage of the first detection terminal is related to the voltage of the first power supply;
[0042] The second detection unit is adapted to detect the signal of the second detection terminal to output the second detection signal; the second detection terminal is suitable for connecting the second interface of the earphone, and the voltage of the second detection terminal is related to the voltage of the second power supply .
[0043] The earphone detection circuit is suitable for being connected with the earphone interface circuit, the earphone interface circuit includes a first detection terminal, a second detection terminal, a first power supply and a second power s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates electronic equipment, an earphone detection circuit, an earphone detection method and an earphone detection device. The earphone detection circuit comprises a first detection unit and a second detection unit, wherein the first detection unit is suitable for detecting a signal of a first detection end so as to output a first detection signal; the first detection end is suitable for being connected with a first interface of an earphone; a voltage of the first detection end is related to that of a first power supply; the second detection unit is suitable for detecting a signal of a second detection end so as to output a second detection signal; the second detection end is suitable for being connected with a second interface of the earphone; a voltage of the second detection end is related to that of a second power supply. According to the technical scheme adopted by the invention, whether the earphone is plugged in or pulled out is determined according to the signals of the two detection ends so as to enable plug-in or pull-out detection of the earphone to be more accurate.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to electronic equipment and earphone detection circuits, methods and devices. Background technique [0002] There are two existing pin-type earphone interface standards, such as figure 1 The OMTP standard is left channel L-right channel R-microphone MIC-ground GND, such as figure 2 The CTIA standard shown is left channel L-right channel R-ground GND-microphone MIC. [0003] After the earphone is plugged into the electronic device, the left channel L interface is in contact with the shrapnel, the shrapnel is connected to the first power supply VDD_IO through the resistor R2, one end of the resistor R3 is connected to the resistor R2, and the other end of the resistor R3 is connected to the detection terminal HEADSET_L_INT and one end of the capacitor C1, the capacitor The other end of C1 is grounded. The GND interface of the ground wire is connected to the ground term...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H04R3/00
Inventor 张洵
Owner SPREADTRUM COMM (SHANGHAI) CO LTD