detection circuit

A technology for detecting circuits and resistors, which is applied in the direction of electrical components, etc., and can solve the problems that electronic devices cannot be judged

CN104105046BActive Publication Date: 2018-03-27ACER INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-03-27

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Abstract

A detection circuit includes first and second pins, a voltage division detection circuit, a processing unit, a microphone switcher and a codec. The first and second pins are used to connect at least one signal conduction area of ​​the earphone plug, and the voltage division detection circuit is used to generate the first and second divided voltages according to the signal conduction area connected to the first and second pins. The processing unit generates a switching control signal to control the microphone switcher according to the first and second divided voltages. When the processing unit detects that the first and second pins are respectively connected to the microphone area and the grounding area of ​​the plug, the first and second pins are respectively connected to the microphone output node and ground; when the processing unit detects that the first and second When the pins are respectively connected to the ground area and the microphone area, the first and second pins are respectively connected to the ground and the microphone output node. With this detection circuit, it is possible to determine the type of earphone inserted into the jack of the earphone.
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Description

technical field

[0001] The invention relates to an electronic device, in particular to an electronic device with the function of automatically detecting earphone plugs. Background technique

[0002] Today's electronic devices are often equipped with earphone jacks, especially hand-held electronic devices, so that the earphones can be used to play music, record, make calls, and so on. Since earphones combined with microphones have become a trend, the electronic device needs to be able to judge whether it is a normal earphone or an earphone combined with a microphone by the received earphone plug. However, there are two types of plugs for microphones and earphones, and today's electronic devices usually can only determine the difference between one of the two types of microphones and earphones and ordinary earphones. If the user is holding a microphone earphone with another plug type, the electronic device cannot judge at this time.

[0003] In view of this, a new solution i...

Examples

Embodiment Construction

[0044] Devices and methods of use of various embodiments of the present invention are discussed in detail below. It should be noted, however, that the present invention provides many possible inventive concepts that can be implemented in various specific scopes. These specific examples are only used to illustrate the device and method of use of the present invention, but are not intended to limit the scope of the present invention.

[0045] figure 1 An electronic device that can accommodate three different types of plugs. As shown in the figure, the electronic device 100 includes a jack 102 and a detection circuit 200. The jack 102 can accommodate the plug 122 of the first type of microphone earphone 128, the plug 132 of the second type of microphone earphone 138, and the plug of a general earphone 148. 142. The first type of microphone earphone 128 is connected to the plug 122 via the connecting wire 129 , and the first type of microphone earphone 128 at least includes ear...