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公开(公告)号：US11557971B2
公开(公告)日：2023-01-17
申请号：US17084663
申请日：2020-10-30
Applicant: MEDIATEK INC.
Inventor： Wei-Chung Chen , Kuo-Chun Hsu , Chen Tsou , Chao-Chang Chiu , Chih-Wei Chang
Abstract: A switching regulator includes a first switch circuit, a second switch circuit, and a protection circuit. The first switch circuit has a first connection node coupled to a first reference voltage, and a second connection node coupled to one end of an inductor. The second switch circuit has a first connection node coupled to a second reference voltage, and a second connection node coupled to the one end of the inductor. The protection circuit senses a voltage level at the first connection node of the first switch circuit, and selectively enables an auxiliary current path in response to the voltage level at the first connection node of the first switch circuit, wherein the auxiliary current path and at least the first switch circuit are arranged in a parallel connection fashion.
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公开(公告)号：US20220029520A1
公开(公告)日：2022-01-27
申请号：US17368782
申请日：2021-07-06
Applicant: MEDIATEK INC.
Inventor： Wei-Chung Chen , Kuo-Chun Hsu
Abstract: A current sensing circuit includes an inductor current sensing circuit and a processing circuit. The inductor current sensing circuit senses an inductor current of a direct current to direct current (DC-to-DC) converter to generate a first sensed current signal, wherein an average value of the first sensed current signal is not a constant under different input voltages of the DC-to-DC converter. The processing circuit generates a second sensed current signal, wherein the first sensed current signal is involved in generation of the second sensed current signal, the second sensed current signal is involved in current-mode control of the DC-to-DC converter, and an average value of the second sensed current signal is a constant under said different input voltages of the DC-to-DC converter.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20200066709A1
公开(公告)日：2020-02-27
申请号：US16529831
申请日：2019-08-02
Applicant: MEDIATEK INC.
Inventor： Shih-Fan Chen , Kuo-Chun Hsu , Tai-Hsiang Lai
Abstract: A semiconductor device includes a P-type substrate, a first isolation region, a plurality of first N-well walls, and an electrostatic discharge (ESD) clamp circuit. The first isolation region is formed within the P-type substrate. The ESD clamp circuit is arranged to discharge ESD current upon detection of an ESD event, and includes a clamping component that is arranged to provide a discharge path for the ESD current. The clamping component is formed on a region wrapped in the first isolation layer and the first N-well walls.
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公开(公告)号：US20190080729A1
公开(公告)日：2019-03-14
申请号：US16110936
申请日：2018-08-23
Applicant: MediaTek Inc.
Inventor： Wei-Chung Chen , Tzu-Chi Huang , Kuo-Chun Hsu
Abstract: Voltage regulators and related methods are described. The voltage regulators described in the application may include an operational amplifier, an output transistor, and a signal buffer connected between the operational amplifier and the output transistor. In some embodiments, these voltage regulators are used in connection with memory units. A voltage regulator may be arranged such that the signal amplifier clamps the voltage at the gate of the output transistor to the output voltage when the memory unit is in an idle mode. In this way, when the memory is accessed, the amplitude and duration of output voltage overshoots can be limited, relative to some voltage regulators.
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公开(公告)号：US11581795B2
公开(公告)日：2023-02-14
申请号：US17368782
申请日：2021-07-06
Applicant: MEDIATEK INC.
Inventor： Wei-Chung Chen , Kuo-Chun Hsu
Abstract: A current sensing circuit includes an inductor current sensing circuit and a processing circuit. The inductor current sensing circuit senses an inductor current of a direct current to direct current (DC-to-DC) converter to generate a first sensed current signal, wherein an average value of the first sensed current signal is not a constant under different input voltages of the DC-to-DC converter. The processing circuit generates a second sensed current signal, wherein the first sensed current signal is involved in generation of the second sensed current signal, the second sensed current signal is involved in current-mode control of the DC-to-DC converter, and an average value of the second sensed current signal is a constant under said different input voltages of the DC-to-DC converter.
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公开(公告)号：US20210143736A1
公开(公告)日：2021-05-13
申请号：US17084663
申请日：2020-10-30
Applicant: MEDIATEK INC.
Inventor： Wei-Chung Chen , Kuo-Chun Hsu , Chen Tsou , Chao-Chang Chiu , Chih-Wei Chang
Abstract: A switching regulator includes a first switch circuit, a second switch circuit, and a protection circuit. The first switch circuit has a first connection node coupled to a first reference voltage, and a second connection node coupled to one end of an inductor. The second switch circuit has a first connection node coupled to a second reference voltage, and a second connection node coupled to the one end of the inductor. The protection circuit senses a voltage level at the first connection node of the first switch circuit, and selectively enables an auxiliary current path in response to the voltage level at the first connection node of the first switch circuit, wherein the auxiliary current path and at least the first switch circuit are arranged in a parallel connection fashion.
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公开(公告)号：US10707756B2
公开(公告)日：2020-07-07
申请号：US16395354
申请日：2019-04-26
Applicant: MEDIATEK Inc.
Inventor： Chao-Chang Chiu , Kuo-Chun Hsu
Abstract: The invention provides a method for improving efficiency of a power converter which may include a switch coupled between a power source and a middle node, and may supply an inductor current at the middle node to result in an output voltage and a load current. The method may comprise: during an intermediate mode, controlling the inductor current to ripple with peaks at a peak current threshold and valleys which may vary as the load current varies.
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