公开(公告)号：US20180308448A1

公开(公告)日：2018-10-25

申请号：US15904722

申请日：2018-02-26

申请人： Samsung Display Co., Ltd.

发明人： Jongjae LEE ,  Dae-sik LEE ,  Yanguk NAM ,  Yoomi KIM ,  Songyi HAN

IPC分类号： G09G3/36 ,  H03K5/1252 ,  H03K5/24

CPC分类号： G09G3/3696 ,  G09G2330/04 ,  G09G2330/12 ,  H03K5/1252 ,  H03K5/24 ,  H03K21/08

摘要： A voltage generation circuit of a display device includes an over-current detection circuit that provides a driving voltage to a voltage terminal and outputs an over-current detection signal. The over-current detection circuit includes a current detector that outputs a detection signal at a first level when a voltage corresponding to an output current flowing through the voltage terminal during a blank period, in which a blank signal is activated, is lower than a first reference level or higher than a second reference level, a glitch remover that outputs a noise detection signal when a time period in which the detection signal is maintained at the first level is longer than a reference maintenance time, and a noise filter that activates the over-current detection signal when the noise detection signal is activated at least twice during a predetermined time period.

公开(公告)号：US20180287596A1

公开(公告)日：2018-10-04

申请号：US15938648

申请日：2018-03-28

申请人： Matthew Murphy ,  Andrew D. Bendtsen

发明人： Matthew Murphy ,  Andrew D. Bendtsen

IPC分类号： H03K5/1252 ,  H05B37/02 ,  H05B33/08 ,  G01R33/422

CPC分类号： H03K5/1252 ,  G01R33/283 ,  G01R33/422 ,  G01R33/5659 ,  H05B33/0845 ,  H05B37/0263

摘要： A filter with five or more electrically isolated inputs filtering EMI is provided for configurable lighting systems in an MRI room. The LED driver can be remote or on board the luminaire. Fixtures with no on-board electronics and Cat5 wiring are also possible given the MZPS characteristics. The embodiment of the filter includes independent, electrically isolated, low voltage, and low current feedthroughs. While the filter housing can take any form, the preferred embodiment is DB (or D-subminiature which contains two or more rows of pins or sockets surrounded by a D-shaped metal shield that, among other things, screens against EMI). Individual feedthrough filters may be paralleled to increase total current required for increase load demand for MRI lighting systems. Further, the use of electrically isolated AC/DC or DC/DC drive electronics, enable the use of a low cost multi-input filter which supplies an MRI scan room with power to drive luminaires.

公开(公告)号：US20180262199A1

公开(公告)日：2018-09-13

申请号：US15873758

申请日：2018-01-17

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Ankur CHAUHAN ,  Abhrarup BARMAN ROY

IPC分类号： H03L7/183 ,  H03K5/1252 ,  H03K5/24 ,  H03K17/041 ,  H03K17/62 ,  H03K17/693 ,  H03K19/0185 ,  H03M1/74 ,  H03M1/46

CPC分类号： H03L7/183 ,  H03K5/1252 ,  H03K5/24 ,  H03K17/04106 ,  H03K17/62 ,  H03K17/693 ,  H03K19/0185 ,  H03M1/46 ,  H03M1/747

摘要： In some examples, a device comprises a first driver coupled to a first node, the first node to couple to a first load external to the device. The device comprises a second driver coupled to a second node, the second node coupled to a second load internal to the device. The device comprises a comparison circuit having an inverting input coupled to the first node and a non-inverting input coupled to the second node. Sizes of the second driver and the second load are configured proportionately to sizes of the first driver and the first load, respectively.

公开(公告)号：US10063159B1

公开(公告)日：2018-08-28

申请号：US15640315

申请日：2017-06-30

申请人： DIALOG SEMICONDUCTOR INC.

发明人： Pengju Kong ,  Tao Li ,  Hien Bui ,  Wenbo Liang ,  Hanguang Zhang

IPC分类号： H02M3/335 ,  H02M1/08 ,  H03K5/1252

CPC分类号： H02M3/33592 ,  H02M1/08 ,  H03K5/1252 ,  Y02B70/1475

摘要： A synchronous rectifier controller for controlling the on and off periods of a synchronous rectifier switch transistor in a switching power converter. In particular, the synchronous rectifier controller is configured to adaptively enable and disable a deglitch filter for filtering a turn-on signal for the synchronous rectifier switch transistor. In this fashion, the synchronous rectifier switch transistor may be switched on more rapidly during periods when the deglitch filter is disabled for greater efficiency yet the switching power converter is protected by the deglitch filter when it is not disabled.

公开(公告)号：US10056904B2

公开(公告)日：2018-08-21

申请号：US15620432

申请日：2017-06-12

申请人： SK hynix Inc. ,  Seoul National University R&DB FOUNDATION

发明人： Mino Kim ,  Suhwan Kim ,  Deog-Kyoon Jeong

IPC分类号： H03F3/45 ,  H03K19/003 ,  H03K3/037 ,  H03K19/20 ,  H03K5/1252

CPC分类号： H03K19/003 ,  H03F2203/45051 ,  H03K3/037 ,  H03K5/1252 ,  H03K19/20

摘要： A receiver includes a first input buffering circuit configured to output a first signal by comparing an input signal and a first offset signal; a second input buffering circuit configured to output a second signal by comparing the input signal and a second offset signal; and a signal mixing circuit configured to output an output signal with a corrected duty ratio by combining the first signal and the second signal.

公开(公告)号：US10020801B2

公开(公告)日：2018-07-10

申请号：US15357099

申请日：2016-11-21

申请人： CT-Concept Technologie GmbH

发明人： Jan Thalheim ,  Olivier Garcia

IPC分类号： H02M3/335 ,  H02M1/00 ,  H02M1/10 ,  H03K17/16 ,  H01F27/28 ,  H01F38/14 ,  H03K5/1252 ,  H03K17/61 ,  H03K17/691 ,  H04L25/02 ,  H03K17/56

CPC分类号： H03K17/16 ,  H01F27/2823 ,  H01F38/14 ,  H02M1/00 ,  H02M3/33576 ,  H02M2001/0012 ,  H03K5/1252 ,  H03K17/56 ,  H03K17/61 ,  H03K17/691 ,  H04L25/0266 ,  H04L25/028

摘要： A switch controller for controlling a power switch includes a signal transformer to galvanically isolate a primary side from a secondary side and receive and transfer a transition signal to transition the power switch to an on or off state between the primary side and the secondary side. The transition signal pulses to a first value to indicate the power switch transitions to the on state, to a second value to indicate the power switch transitions to the off state, and remains at a third value when there is no transition. A transmission circuit is coupled to a primary winding to control a switch to generate the transition signal. The switch switches a substantially low impedance onto the primary winding when there is no transition. A receiver circuit is coupled to a secondary winding to generate a drive signal to control the power switch in response to the transition signal.

公开(公告)号：US20180175836A1

公开(公告)日：2018-06-21

申请号：US15739550

申请日：2016-06-24

申请人： THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE

发明人： Elisa Nicole HURWITZ

IPC分类号： H03K4/02 ,  H03K5/1252 ,  H03K5/12

CPC分类号： H03K4/023 ,  H03K3/57 ,  H03K5/12 ,  H03K5/1252 ,  H03K17/166 ,  H03K2005/00013

摘要： Method and apparatus to produce a step function with a designed transition (rise and/or fall) time on the order of

公开(公告)号：US09960756B1

公开(公告)日：2018-05-01

申请号：US15367560

申请日：2016-12-02

申请人： Silicon Laboratories Inc.

发明人： Navin Harwalkar

IPC分类号： H03K5/1252 ,  H05K1/02 ,  H03F3/195 ,  H01L23/66

CPC分类号： H03K5/1252 ,  H01L23/64 ,  H01L23/66 ,  H03F1/223 ,  H03F3/195 ,  H03F2200/114 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/451 ,  H03K19/00346 ,  H05K1/0216 ,  H05K1/023 ,  H05K1/0243 ,  H05K3/328 ,  H05K2203/049

摘要： Bypass techniques are provided herein to protect noise sensitive circuits from both internal and external noise sources. According to one embodiment, an integrated circuit (IC) chip may include a noise sensitive circuit coupled between a power supply pad and a first ground pad of the IC chip. In order to protect the first ground pad of the noise sensitive circuit, two distinct bypass paths are provided to route noise current around the noise sensitive circuit. Each bypass path terminates in its own ground pad (e.g., a second ground pad and third ground pad), which is separate from the first ground pad of the noise sensitive circuit.

公开(公告)号：US20180109246A1

公开(公告)日：2018-04-19

申请号：US15783930

申请日：2017-10-13

申请人： Ricardo Zaplana

发明人： Ricardo Zaplana

IPC分类号： H03K5/1252 ,  H03K3/84 ,  H03K3/017 ,  H03K5/24 ,  H03B5/12

CPC分类号： H03K5/1252 ,  H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H02M3/33523 ,  H02M3/33569 ,  H03B5/1265 ,  H03B2200/004 ,  H03B2201/025 ,  H03K3/017 ,  H03K3/84 ,  H04B5/0075 ,  Y02B70/1433

摘要： It is often desirable to transmit data between circuits or components operating at a relatively high voltage and circuits operating at a relatively low voltage. Such a task can be performed by use of an isolator. Some isolator designs use magnetic coupling to transfer the data as this is more robust against inadvertently transmitting high voltage transients than capacitor based isolators. However it is often desirable to encode the data for exchange across the transformer of the isolator and decode after transmission across the transformer. This requires power for the encoding and decoding circuits. To ensure both sides are powered, power may be transferred by another transformer. The transformer primary is driven by an oscillating signal. The system disclosed in some embodiments herein varies the frequency of the oscillating signal to mitigate the risk of it interfering with other circuits or systems associated with the isolator.

公开(公告)号：US09793904B1

公开(公告)日：2017-10-17

申请号：US15469434

申请日：2017-03-24

申请人： MICRO LAMBDA WIRELESS, INC.

发明人： Oleksandr Chenakin

IPC分类号： H03L7/06 ,  H03L7/087 ,  H03L7/099 ,  H03K5/1252

CPC分类号： H03L7/087 ,  H03K5/1252 ,  H03L7/099 ,  H03L7/18

摘要： An improved noise-corrected phase-locked loop frequency synthesizer configured to reduce noise, such as phase noise and spurious signals, without the use of switching circuits. The synthesizer uses a phase shifter device configured to accept a noise containing frequency signal from a voltage controlled oscillator (VCO) circuit, such as an integer-N single loop PLL synthesizer, as well as noise reducing control signals from a noise detecting sensor or circuit, and output a noise reduced VCO frequency signal. In some embodiments, the noise reducing sensor may be formed from a second, lower noise, phase locked loop circuit. The frequency synthesizer circuit, noise detecting sensor, and the phase shifter device are configured to all run continuously, with the noise reducing sensor and frequency shifter continually acting to reduce noise, produced by higher noise integer-N PLL frequency synthesizer.