Driving stage circuit with plural clamping levels

    公开(公告)号:US10014850B2

    公开(公告)日:2018-07-03

    申请号:US15287719

    申请日:2016-10-06

    Inventor: Hsinlun Li

    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.

    Micro-electro-mechanical system device

    公开(公告)号:US10012671B2

    公开(公告)日:2018-07-03

    申请号:US14931696

    申请日:2015-11-03

    Inventor: Shih-Chieh Lin

    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.

    BIO-CELL DETECTION APPARATUS AND BIO DETECTION METHOD

    公开(公告)号:US20180143153A1

    公开(公告)日:2018-05-24

    申请号:US15724076

    申请日:2017-10-03

    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.

    CHARGER CIRCUIT AND CAPACITIVE POWER CONVERSION CIRCUIT AND CHARGING CONTROL METHOD THEREOF

    公开(公告)号:US20180083458A1

    公开(公告)日:2018-03-22

    申请号:US15639732

    申请日:2017-06-30

    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.

    Power converter with synchronous control function and control method thereof

    公开(公告)号:US09755530B2

    公开(公告)日:2017-09-05

    申请号:US15144610

    申请日:2016-05-02

    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.

    TUNABLE DC VOLTAGE GENERATING CIRCUIT

    公开(公告)号:US20170227974A1

    公开(公告)日:2017-08-10

    申请号:US15284755

    申请日:2016-10-04

    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.

    DUAL-CONSTANT-TIME BUCK-BOOST SWITCHING REGULATOR AND CONTROL CIRCUIT AND METHOD THEREOF

    公开(公告)号:US20170201178A1

    公开(公告)日:2017-07-13

    申请号:US15217102

    申请日:2016-07-22

    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.

    FLYBACK POWER CONVERTER WITH PROGRAMMABLE OUTPUT AND CONTROL CIRCUIT AND CONTROL METHOD THEREOF

    公开(公告)号:US20170163162A1

    公开(公告)日:2017-06-08

    申请号:US15433761

    申请日:2017-02-15

    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.

Patent Agency Ranking