Abstract: The present invention provides a judging circuit including a comparison module and a control module for positive and negative terminals of an earphone MIC and a method thereof, and an electronic device; the control module controls any one first terminal of two terminals of the MIC to inject an excitation current, and control the other second terminal of the two terminals to be connected to the ground via an analog switch, also to judge whether the first terminal and the second terminal is the positive terminal or the negative terminal according to comparison result information; the comparison module compares the current voltage with a preset reference voltage value after excitation current is injected into the first terminal and the second terminal is grounded to obtain comparison result information and to send it to the connected control module. The present invention improves the flow and process without two sets of detection device.

Abstract: The present invention provides an electronic device and an accessory with quick charging and audio transmission functions. The electronic device can be respectively connected to a charger and an audio connector through the accessory. The electronic device includes a quick charging controller and a device Type-C female socket. The quick charging controller is used for performing quick charging protocol communication by utilizing the SBU pins of the device Type-C female socket and the D+ pin and the D? pin of a charger connected to the accessory when the accessory is connected to the device Type-C female socket and the charger is connected to the accessory. The present invention breaks through the usual thought of using the CC pin to perform quick charging protocol communication in the existing quick charging mode. Further, when the accessory with the audio transmission function is used, the quick charging can also be performed.

Abstract: The present invention provides an electronic device and an accessory with quick charging and audio transmission functions. The electronic device can be respectively connected to a charger and an audio connector through the accessory. The electronic device includes a quick charging controller and a device Type-C female socket. The quick charging controller is used for performing quick charging protocol communication by utilizing the SBU pins of the device Type-C female socket and the D+ pin and the D? pin of a charger connected to the accessory when the accessory is connected to the device Type-C female socket and the charger is connected to the accessory. The present invention breaks through the usual thought of using the CC pin to perform quick charging protocol communication in the existing quick charging mode. Further, when the accessory with the audio transmission function is used, the quick charging can also be performed.

Abstract: The present invention provides a single-pole double-throw switch circuit with a Type-C interface, an analog switch chip and an electronic device, which can generate a reverse bias voltage across a first diode, so that a capacitance value of a PN junction can be significantly reduced after the reverse bias voltage is applied to the PN junction. Further, a ground capacitance corresponding to a COM point when the first diode is turned off can be effectively reduced, avoiding the reduction of a bandwidth of a digital path due to excessive capacitance. It can be seen that the present invention can realize a large size of a first field effect transistor and a high bandwidth of the digital path simultaneously, thereby facilitating the simultaneous improvement of the THD performance of an analog audio path and the bandwidth of the digital path, and avoiding conflicts between the two.

Abstract: The present invention provides a single-pole double-throw switch circuit with a Type-C interface, an analog switch chip and an electronic device, which can generate a reverse bias voltage across a first diode, so that a capacitance value of a PN junction can be significantly reduced after the reverse bias voltage is applied to the PN junction. Further, a ground capacitance corresponding to a COM point when the first diode is turned off can be effectively reduced, avoiding the reduction of a bandwidth of a digital path due to excessive capacitance. It can be seen that the present invention can realize a large size of a first field effect transistor and a high bandwidth of the digital path simultaneously, thereby facilitating the simultaneous improvement of the THD performance of an analog audio path and the bandwidth of the digital path, and avoiding conflicts between the two.

Abstract: The invention provides a docking charging circuit and an electronic device, including a power supply side module and a receiving side module that can be docked with each other, wherein the power supply side module further includes a power supply side drive unit, a power generating unit, a first switch unit and a first intermediate terminal, and the receiving side module further includes a second intermediate terminal, a first resistance circuit and a second resistance circuit, with the control of the first switch unit by the power supply side drive unit, the first switch unit can be controlled to be turned on when in positive connection to realize power supply, and the first switch unit can be controlled to be turned off when in reverse connection to avoid damage to the devices in the power supply side module and the receiving side module caused by power supply during the reverse connection.

Abstract: The invention provides a docking charging circuit and an electronic device, including a power supply side module and a receiving side module that can be docked with each other, wherein the power supply side module further includes a power supply side drive unit, a power generating unit, a first switch unit and a first intermediate terminal, and the receiving side module further includes a second intermediate terminal, a first resistance circuit and a second resistance circuit, with the control of the first switch unit by the power supply side drive unit, the first switch unit can be controlled to be turned on when in positive connection to realize power supply, and the first switch unit can be controlled to be turned off when in reverse connection to avoid damage to the devices in the power supply side module and the receiving side module caused by power supply during the reverse connection.

Abstract: The present invention provides a judging circuit includes including a comparison module and a control module for positive and negative terminals of an earphone MIC and a method thereof, and an electronic device; the control module controls any one first terminal of two terminals of the MIC to inject an excitation current, and control the other second terminal of the two terminals to be connected to the ground via an analog switch, also to judge whether the first terminal and the second terminal is the positive terminal or the negative terminal according to comparison result information; the comparison module compares the current voltage with a preset reference voltage value after excitation current is injected into the first terminal and the second terminal is grounded to obtain comparison result information and to send it to the connected control module. The present invention improves the flow and process without two sets of detection device.