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1.发明授权公开(公告)号：US11968503B2
公开(公告)日：2024-04-23
申请号：US17755882
申请日：2020-09-24
发明人： Zhifei Yang , Haijun Zhang , Liming Du , Jiantao Cheng , Hongjun Sun
CPC分类号： H04R3/007 , G01R19/2509
摘要： A current detection circuit and method for protecting a speaker, and a chip are provided. The current detection circuit includes a current detection module and an analog-to-digital converter. The current detection module samples a current flowing through the speaker based on current mirror technology, and converts the current into a voltage to output a first voltage signal and a second voltage signal. The analog-to-digital converter converts the first voltage signal and the second voltage signal into a PDM code, to calculate a current parameter of the speaker.
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公开(公告)号：US11907437B2
公开(公告)日：2024-02-20
申请号：US17595403
申请日：2020-05-14
发明人： Tao Cheng , Zhong Zhang , Jiantao Cheng , Liming Du , Hongjun Sun
IPC分类号： G06F3/041 , G06F3/02 , G06F3/023 , G06F3/0346 , H04M1/23
CPC分类号： G06F3/0202 , G06F3/023 , G06F3/0346 , H04M1/236
摘要： A terminal control system and method, and a terminal device are provided. The terminal control system includes: a detection chip and at least one terminal key arranged on a side surface of a terminal device. The detection chip is connected to the terminal key. The terminal key is configured to generate an inductive capacitance and an interelectrode capacitance corresponding to an external control instruction, in response to a reception of the external control instruction. The detection chip is configured to detect the inductive capacitance and the interelectrode capacitance; determine inductive capacitance variation corresponding to the inductive capacitance and interelectrode capacitance variation corresponding to the interelectrode capacitance; determine a control type corresponding to the control instruction according to the inductive capacitance variation and the interelectrode capacitance variation; and trigger the terminal device to perform a control operation corresponding to the control type.
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公开(公告)号：US11196399B2
公开(公告)日：2021-12-07
申请号：US16682978
申请日：2019-11-13
发明人： Wei Yao , Songying Jiang , Ma Zhu , Liming Du
摘要： A signal processing method, device and system are provided. A fitting amplitude of an input signal is acquired by performing fitting on the input signal according to a predetermined fitting model. A determination result about whether to apply a gain on the input signal is determined based on the fitting amplitude, and a gain signal is obtained based on the determination result. A delay signal acquired by delaying the input signal is processed based on the gain signal, to obtain an output signal. With the signal processing device and system, a simple structure and a small calculation amount are achieved, and the signal processing efficiency and the signal processing effect are improved.
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公开(公告)号：US11770120B2
公开(公告)日：2023-09-26
申请号：US17764699
申请日：2020-09-22
发明人： Zhifei Yang , Haijun Zhang , Liming Du , Jiantao Cheng , Hongjun Sun , Yongqing Qiao
IPC分类号： H03K17/04 , H03K17/041
CPC分类号： H03K17/04106 , H03K2217/0081
摘要： A bootstrap circuit supporting fast charging and discharging and a chip. A voltage measurement module (12) and a switch module (11) are arranged, and the voltage measurement module (12) controls an operating state of the switch module (11); during charging, under a specific condition, the switch module (11) is enabled to be in an on state so as to achieve fast charging of a voltage output end; and during discharging, the purpose of fast discharging is achieved by means of a second field effect transistor (MP5) arranged in the bootstrap circuit.
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公开(公告)号：US11698393B2
公开(公告)日：2023-07-11
申请号：US17423346
申请日：2020-01-13
发明人： Zhifei Yang , Haijun Zhang , Wei Yao , Liming Du , Jiantao Cheng
CPC分类号： G01R19/0069 , H03F3/217 , H04R3/00
摘要： The present disclosure provides a current detection circuit for a loudspeaker 500, comprising a first detection resistor RSP, a second detection resistor RSN, a sampling selection circuit 100, an input selection circuit 200, and a processing circuit 300. By adding the sampling selection circuit 100 and the input selection circuit 200, voltages on two ends of the corresponding detection resistors (RSP, RSN) are sampled according to the fact that potential differences of an output stage VOP and an output stage VON of a class-D audio power amplifier 400 are in different semi-periods, and the current of the loudspeaker 500 is obtained through processing, thereby detecting the current of the loudspeaker 500 without adding an anti-clipping distortion function to the class-D audio power amplifier 400.
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公开(公告)号：US10992222B2
公开(公告)日：2021-04-27
申请号：US16224417
申请日：2018-12-18
发明人： Zhifei Yang , Haijun Zhang , Wei Yao , Jianing Zhou , Liming Du
摘要： A detection circuit and an electronic device using the detection circuit are provided. The detection circuit includes a fourth branch, a fifth branch and a third energy storage unit. The fourth branch includes multiple fourth switches, and the fifth branch includes multiple fifth switches. A preset electrical signal threshold is sampled and applied to the third energy storage unit by controlling the multiple fourth switches in the fourth branch, and a voltage difference between two detection terminals of a first energy storage unit is sampled and applied to the third energy storage unit by controlling the multiple fifth switches in the fifth branch, to compare the voltage difference between the two detection terminals with the preset electrical signal threshold.
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