Broken line and short circuit detection circuit and method for earphone/headset speaker

Abstract

The invention relates to a broken line and short circuit detection circuit and method for an earphone / headset speaker. The detection circuit comprises an MCU, a measurement signal voltage division circuit and a high frequency signal amplification and protection circuit; a detection control signal output end of the MCU is connected with the high frequency signal amplification and protection circuit, and a voltage signal input end of the MCU is connected with the high frequency signal amplification and protection circuit through the measurement signal voltage division circuit; and the high frequency signal amplification and protection circuit is arranged between the earphone / headset speaker and an audio signal output circuit. The method comprises the following steps: sending a DC or AC detection control signal by the MCU, and reading a detection voltage value of the earphone / headset speaker by the measurement signal voltage division circuit; and judging whether the broken line or short circuit occurs according to a threshold. The circuit and the method of the invention are used for radio interphones, mobile phones and electronic sound playback equipment, and can timely detect the broken line / short circuit faults of the earphone / headset speaker, so as not to affect the use. The broken line and short circuit detection circuit and the method for the earphone / headset speaker provided by the invention have the advantages of being low in cost, simple in circuit, practical, reliable and so on.

Description

technical field [0001] The invention relates to walkie-talkies, mobile phones, electronic sound propagation and playback fields, earphone / headset speaker disconnection and short circuit detection circuit and method, specifically a kind of earphone / headset speaker disconnection for radio receivers, electronic sound propagation and playback equipment (device) Line and short circuit detection circuit and method. Background technique [0002] In modern life, with the development of electronic technology, radio walkie-talkies, mobile phones, and electronic sound playback systems are more and more widely used. When people use walkie-talkies / mobile phones / radios and other transmission and playback devices, they need to use speaker earphones / headsets, but when they are disconnected or short-circuited, users cannot detect them in time, especially if the earphone / headset speaker is disconnected when turning on the phone. Or a short circuit occurs, and the sound cannot be received or ...

AI Technical Summary

Problems solved by technology

When people use walkie-talkies / mobile phones / radios and other transmission and playback devices, they need to use speaker earphones / headsets, but when they are disconnected or short-circuited, users cannot detect them in time, especially if the earphone / headset speaker is disconnected when turning on the phone. Or a short circuit occurs, and the sound cannot be received or played after starting up, and it cannot be found in time, which will affect the use of radio walkie-talkies, mobile phones, and electronic sound playback systems

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