Automatic detection circuit for socket insertion and mobile terminal

Abstract

The invention provides an automatic detection circuit for socket insertion. The automatic detection circuit for socket insertion includes a power supply, a transistor, a jack module and a control module, the jack module has a grounded terminal, the power supply is connected to a base electrode of the triode, the base electrode of the triode is connected to the grounded terminal of the jack terminal to form a circuit, an emitter of the triode is grounded to form a circuit with the power supply, the base electrode of the triode is connected to the power supply, and a collector of the triode is connected to the control module to form a circuit with the control module and the power supply; and when a socket is inserted into the jack module, the base electrode is disconnected from the groundedterminal of the jack module so that the collector of the transistor is in a short circuit with to ground. Furthermore, the present invention also proposes a mobile terminal. A signal terminal of the jack module is improved in the invention, that is, the detection circuit for identifying whether the socket is inserted into the jack module is added to the signal end of the jack module, and it is unnecessary to add or introduce other interfaces, thus circuit design is simplified, the production cost is reduced, and the broad adaptability of the product is improved.

Description

technical field [0001] The invention relates to the technical field of socket hole identification, in particular to a socket insertion automatic detection circuit and a mobile terminal. Background technique [0002] Various mobile terminals or smart terminals currently on the market are usually equipped with 3.5mm jacks to realize the function of plugging in earphones. In the prior art, in order to realize the automatic switching function of the 3.5mm jack, the jack needs to automatically identify whether there is an earphone plugged in. However, the traditional plug-and-plug identification requires an additional independent detection switch, which is completely independent from the signal line of the jack, resulting in many pins, making the circuit design more complicated, and the selection limitations increased. Contents of the invention [0003] The main purpose of the present invention is to provide an automatic detection circuit for socket insertion, which aims to so...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide an automatic detection circuit for socket insertion, which aims to solve the problems in the prior art that an additional independent detection switch needs to be provided for socket insertion and removal recognition, which makes the circuit design more complicated and the limitation of model selection increases.

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