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公开(公告)号：US20180190819A1
公开(公告)日：2018-07-05
申请号：US15585949
申请日：2017-05-03
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Tsung-Yi Huang
IPC: H01L29/78 , H01L29/06 , H01L23/535 , H01L29/66 , H01L21/768
CPC classification number: H01L29/7834 , H01L21/76895 , H01L23/535 , H01L29/0653 , H01L29/6659 , H01L29/66636
Abstract: The present invention provides a MOS (Metal-Oxide-Silicon) device and a manufacturing method thereof. The MOS device includes: a semiconductor substrate, a gate, a source, a drain, and two LDDs (Lightly-Doped-Drains). At least one recess is formed at an upper surface of the semiconductor substrate. The recess has a depth which is deeper than the depth of the two LDDs. The recess is filled with a conductive material. A vertical connection portion is formed at a boundary of the recess in the vertical direction, to at least connect one of the LDDs to the drain. The LDD closer to the drain is not laterally in contact with the drain but is connected to the drain by the vertical direction.
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公开(公告)号：US10014850B2
公开(公告)日：2018-07-03
申请号：US15287719
申请日：2016-10-06
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hsinlun Li
IPC: H03K3/00 , H03K17/0812 , H03K5/08 , H03K17/082 , H03K17/10 , H03K17/12
CPC classification number: H03K17/08122 , H03K5/08 , H03K17/0822 , H03K17/102 , H03K17/122
Abstract: The present invention provides a driving stage circuit, including a driving switch circuit and a conduction resistance adjusting circuit. The driving switch circuit generates an output signal according to a switch control signal. The conduction resistance adjusting circuit clamps the switch control signal to a first clamping level according to a current flowing through the driving switch circuit when the current is higher than a first current threshold, such that the conduction resistance of the driving switch circuit is not smaller than a first resistance so that a short circuit current of the driving switch circuit is not larger than a short circuit current limit, wherein a lowest level of the conduction resistance of the driving switch circuit is smaller than a second resistance and the output voltage level does not exceeds a output voltage limit when the current is lower than the first current threshold.
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公开(公告)号：US10012671B2
公开(公告)日：2018-07-03
申请号：US14931696
申请日：2015-11-03
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Shih-Chieh Lin
IPC: G01P15/125
CPC classification number: G01P15/125 , G01P15/18 , G01P21/00 , G01P2015/0814 , G01P2015/0831 , G01P2015/0868
Abstract: A MEMS device includes: a substrate; a proof mass suspended over the substrate, the proof mass including at least one proof mass body and a proof mass frame connected to and accommodating the proof mass body, the proof mass frame including at least one self-test frame; and at least one self-test electrode inside the self-test frame, and connected to the substrate; wherein when a voltage difference is applied between the self-test electrode and the self-test frame, the proof mass is driven to have an in-plane movement, and wherein the self-test electrode and the self-test frame do not form a sensing capacitor in between.
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公开(公告)号：US20180143153A1
公开(公告)日：2018-05-24
申请号：US15724076
申请日：2017-10-03
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Chao-Shiun Wang , Chang-Yu Ho
CPC classification number: G01N27/228 , C12Q1/6825 , C12Q2565/607 , G01N33/48707
Abstract: The present invention provides a bio-cell detection apparatus and a bio detection method. The bio detection method includes: in absence of a biological reagent being introduced, pre-calibrating an initial value of a bio-cell detection chip. In absence of a sample to be tested in the bio-cell detection chip, introducing only the biological reagent into the bio-cell detection chip; and, measuring a first electrical parameter between a pair of opposing electrodes of the bio-cell detection chip. Introducing both the biological reagent and the sample to be tested into the bio-cell detection chip at the same time; and, measuring a second electrical parameter between the pair of opposing electrodes of the bio-cell detection chip. Comparing the second electrical parameter and the first electrical parameter, to determine whether a target biomolecule to be detected is present.
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95.发明申请公开(公告)号：US20180083459A1
公开(公告)日：2018-03-22
申请号：US15633694
申请日：2017-06-26
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Jen Huang , Shui-Mu Lin , Tsung-Wei Huang , Chih-Hua Hou
CPC classification number: H02J7/0008 , H02J7/0045 , H02J7/0052 , H02J7/0072 , H02J7/0077 , H02J7/022 , H02J7/027 , H02M3/07
Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit, a capacitive power conversion circuit and a reverse blocking switch circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled with one or more conversion capacitors, and a conversion control circuit. The DC current is regulated to a predetermined DC current level, and the conversion control circuit controls the connections of the plural conversion capacitors such that the charging current is scaled-up of the predetermined DC current level substantially by a current scale-up factor. The reverse blocking switch circuit is coupled in series with the capacitive power conversion circuit. The body diode of the reverse blocking switch is reversely coupled to the body diode of the conversion switch.
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Patent Agency Ranking
96.发明申请公开(公告)号：US20180083458A1
公开(公告)日：2018-03-22
申请号：US15639732
申请日：2017-06-30
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Tsung-Wei Huang , Shun-Yu Huang
Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit and a capacitive power conversion circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches and being coupled with one or plural conversion capacitors, a regulation switch, and a conversion control circuit. In a current scaled-up charging mode, the DC current is regulated, and the conversion control circuit controls the connection of the plural conversion capacitors such that the charging current is scaled-up of the DC current substantially by a predetermined current scale-up factor. In a constant voltage linear charging mode, the conversion control circuit linearly controls the regulation switch to regulate the level of the charging voltage to a predetermined constant voltage level.
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公开(公告)号：US09755530B2
公开(公告)日：2017-09-05
申请号：US15144610
申请日：2016-05-02
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Li-Di Luo , Yu-Kai Chen , Yu-Chang Chen
CPC classification number: H02M3/33523 , H02M1/08 , H02M3/33592 , Y02B70/1475
Abstract: The present invention discloses a power converter with synchronous control function and control method thereof. The power converter includes: a transformer, a power switch, a switch control unit, a signal coupling circuit, a synchronous rectifying switch and a secondary side control circuit. The switch control unit generates an operation signal according to a feedback signal, and generates a first synchronous signal which is related to the operation signal. The signal coupling circuit couples the first synchronous signal to generate a second synchronous signal. The synchronous rectifying switch is turned ON/OFF according to a synchronous rectifying switch signal, for synchronous rectification. The secondary side control circuit generates the synchronous rectifying switch signal according to a secondary side level detection signal and the second synchronous signal, to control the synchronous rectifying switch. The ON time of the power switch and the ON time of the synchronous rectifying switch do not overlap.
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公开(公告)号：US20170227974A1
公开(公告)日：2017-08-10
申请号：US15284755
申请日：2016-10-04
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi LIU , Wei-Hsin WEI
IPC: G05F1/46
CPC classification number: G05F1/46 , H02J7/025 , H02M1/4225 , H02M3/06 , H02M3/156 , H02M3/158 , H02M3/1588 , H02M7/06 , H02M2001/0054 , H03H7/38
Abstract: A tunable DC voltage generating circuit includes: a resonance circuit including an inductor and an input capacitor connected in series configuration, and arranged to operably receive an input signal and generating a resonance signal at an output node between the inductor and the input capacitor; a rectifying circuit coupled with the output node and arranged to operably rectify the resonance signal; a current control unit connected with the resonance circuit in series configuration; a stabilizing capacitor coupled with an output terminal of the rectifying circuit and arranged to operably provide a DC output signal having a voltage level greater than that of the input signal; and a control circuit coupled with the output terminal of the rectifying circuit and the current control unit, and arranged to operably adjust a current passing through the current control unit to thereby change the DC output signal.
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99.发明申请公开(公告)号：US20170201178A1
公开(公告)日：2017-07-13
申请号：US15217102
申请日：2016-07-22
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hung-Yu Cheng
CPC classification number: H02M3/1582 , H02M1/08 , H02M2001/0054 , Y02B70/1491
Abstract: The present invention provides a dual constant time buck-boost switching regulator, and a control circuit and a method thereof. The buck-boost switching regulator converts an input voltage to an output voltage and it includes a buck circuit and a boost circuit. The buck circuit includes an inductor, a buck power switch and a buck power device. The boost circuit includes the inductor, a boost power switch and a boost power device. The present invention controls the buck power switch to be OFF by a constant OFF time in the buck conversion mode, and controls the boost power switch to be ON by a constant ON time in the boost conversion mode. An offset signal ensures that the buck-boost regulator operates only in pure buck conversion mode and pure boost conversion mode, but does not need to operate in a buck-boost conversion mode.
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100.发明申请公开(公告)号：US20170163162A1
公开(公告)日：2017-06-08
申请号：US15433761
申请日：2017-02-15
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Kuang-Fu Chang , Tzu-Chen Lin , Chien-Fu Tang
IPC: H02M3/335 , H03K17/785 , H02M1/08 , H03L7/00
CPC classification number: H02M3/33523 , H02M2001/0032 , Y02B70/16
Abstract: The present invention provides a flyback power converter with a programmable output and a control circuit and a control method thereof. The flyback power converter converts an input voltage to a programmable output voltage according to a setting signal, wherein the programmable output voltage switches between different levels. The flyback power converter includes: a transformer circuit, a power switch circuit, a current sense circuit, an opto-coupler circuit, and a control circuit. The control circuit adaptively adjusts an operation signal according to a level of the programmable output voltage, to maintain a same or relatively higher operation frequency of the operation signal when the programmable output voltage switches to a relatively lower level, so as to maintain a phase margin while supplying the same output current.
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