Earphone interface circuit and electronic equipment

Abstract

The invention discloses an earphone interface circuit and electronic equipment, relating to the technical field of electrons and solving the technical problem that the traditional earphone interface circuit can not accurately detect whether an earphone is in an inserting state or not when an audio signal is a non-biased voltage signal. The earphone interface circuit comprises a socket interface, an audio signal output pin, an audio input pin, a grounding pin, an elastic pin, an earphone state testing end, a power supply module and a control detection module, wherein the socket interface is connected with the grounding pin; when the earphone is inserted into the socket interface and in the inserting state, the grounding part of the earphone abuts against the socket interface; the power supply module is connected with the audio input pin and used for inputting electric energy to the audio input pin; and the control detection module is connected with the earphone state testing end and used for judging whether the earphone is in the inserting state or not according to the change of a level at the earphone state testing end. The electronic equipment comprises the earphone interface circuit. The invention is applied to the electronic equipment provided with the earphone interface circuit.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an earphone interface circuit and electronic equipment provided with the earphone interface circuit. Background technique [0002] With the continuous development of electronic technology, earphones have become one of the indispensable important devices on electronic equipment such as mobile phones and computers. [0003] When the earphone is plugged into the earphone jack and is in the plugged state, it can be connected to the control and detection module of the electronic device through the earphone interface circuit. The control and detection module of the electronic device inputs an audio signal to the earphone through the earphone interface circuit, and the speaker of the earphone recognizes the audio signal And play out the sound corresponding to the audio signal, the microphone of the earphone can receive the user's voice, convert the user's voice into an audio signal,...

AI Technical Summary

Problems solved by technology

[0019] The embodiment of the present invention provides an earphone interface circuit and an electronic device equipped with the earphone interface circuit, which solves the problem that the existing earphone interface circuit cannot accurately detect whether the earphone is in the inserted state when the audio signal is a signal without bias voltage technical issues

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