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1.发明申请
公开(公告)号：WO2022026814A1
公开(公告)日：2022-02-03
申请号：PCT/US2021/043874
申请日：2021-07-30
IPC分类号： H04W72/04 , H04L5/00 , H04W74/0816 , H04W74/0841 , H04W84/12
摘要： A method can include wireless device operations, including receiving a trigger communication that identifies available random access resource units (RA RUs), the RA RUs being portions of transmission channel for a wireless system. In response to a back-off value and a number of available RA RUs, selecting or not selecting one RA RU as a transmission RA RU. In response to not selecting a transmission RA RU, monitoring for wireless responses following the trigger communication to determine unselected RA RUs, designating one unselected RA RUs as an alternate RA RU; and transmitting uplink data on the alternate RA RU. The unselected RA RUs comprise any RA RUs that remain after other wireless devices have selected RA RUs in response to the trigger communication. Corresponding devices and systems are also disclosed.
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2.发明申请
公开(公告)号：WO2021061455A1
公开(公告)日：2021-04-01
申请号：PCT/US2020/050913
申请日：2020-09-15
发明人： SHAH, Pulkit , RAJESH, Karri , KHAMESRA, Arun , RAI, Hariom
IPC分类号： H02M7/217
摘要： A secondary-side controller for an AC-DC converter that has a single synchronous rectifier sensing (SR_SNS) terminal, coupled to a synchronous rectifier (SR) of the AC-DC converter, and a voltage divider circuit coupled to the single SR_SNS terminal configured to provide signals to a sensing circuit. The voltage divider includes an active diode, an internal resistive element, and a switch, in which the active diode is configured to control the switch to enable or disable the internal resistive element based on a comparison result of a voltage at the single SR_SNS terminal and a reference voltage.
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公开(公告)号：WO2021055203A1
公开(公告)日：2021-03-25
申请号：PCT/US2020/049922
申请日：2020-09-09
发明人： RAJESH, Karri , KHAMESRA, Arun
摘要： Techniques for avoiding false negative sense (NSN) detection in a flyback AC-DC converter are described herein. In an example embodiment, a secondary side controller of the AC-DC converter comprises a frequency detector, a negative sense detector, and control logic. The frequency detector is configured to determine a frequency of an input signal from the drain node of a synchronous rectifier (SR) circuit on the secondary side of the AC-DC converter. The negative sense detector is configured to determine a negative voltage of the input signal. The control logic is configured to: enable the negative sense detector, when the frequency of the input signal rises above a frequency threshold value; and turn on the SR circuit to transfer power to the secondary side of the AC-DC converter, when the negative voltage of the input signal falls below a voltage threshold value.
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公开(公告)号：WO2021034861A1
公开(公告)日：2021-02-25
申请号：PCT/US2020/046859
申请日：2020-08-18
发明人： AHMED, Rashed , RAI, Hariom
摘要： Controlling an active clamp field effect transistor (FET) in a secondary-controlled active clamp converter is described. In one embodiment, an apparatus includes a primary-side FET coupled to a transformer, a secondary-side FET coupled to the transformer, and an active clamp FET disposed on a primary side of the transformer. A secondary-side controller is configured to control the active clamp FET across a galvanic isolation barrier.
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5.发明申请
公开(公告)号：WO2020263530A1
公开(公告)日：2020-12-30
申请号：PCT/US2020/036201
申请日：2020-06-04
发明人： KHAMESRA, Arun , RAI, Hariom , SHAH, Pulkit
摘要： Communicating fault indications between primary and secondary controller in a secondary-controlled flyback converter is described. In one embodiment, an apparatus includes a primary-side field effect transistor (FET) coupled to a flyback transformer coupled to the primary-side FET, and a primary-side controller coupled to the flyback transformer. The primary-side controller is configured to receive a signal from a secondary-side controller across a galvanic isolation barrier, apply a pulse signal to the primary-side FET in response to the signal to turn-on and turn-off the primary-side FET, communicate information to the secondary-side controller across the flyback transformer by varying a first pulse width of the pulse signal to a second pulse width and applying the pulse signal with the second pulse width to the primary-side FET.
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公开(公告)号：WO2020251721A1
公开(公告)日：2020-12-17
申请号：PCT/US2020/032964
申请日：2020-05-14
摘要： Disclosed are methods and systems for delaying packet transmissions over a wireless communication channel until a more favorable channel condition is detected. A device may measure a channel metric when it receives periodic beacon signals. The device may compare the channel metric against a programmed metric threshold. If the channel metric is less than the metric threshold, the device may delay the transmission of a packet until a later transmission window or transmit opportunity (TXOP) when the channel metric rises above the metric threshold, indicating the presence of a more favorable condition for transmission, or until a preconfigured timeout period elapses before the more favorable condition is found.
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公开(公告)号：WO2020185304A1
公开(公告)日：2020-09-17
申请号：PCT/US2020/013949
申请日：2020-01-16
摘要： Disclosed are methods and systems for a WLAN device to select an operating dynamic frequency selection (DFS) channel that minimizes the probability of radar interference by using aiding information. The aiding information may be a crowd-sourced database of geo-tagged radar zones including one or more DFS channels used within the geo-tagged radar zones that are detected by a plurality of WLAN devices. The WLAN device may query the crowd-sourced database for a geo-tagged radar zone that is nearby to determine if a radar operates on an overlapping DFS channel so it may switch to a different channel. In one aspect, the aiding information may be periodic special action frames broadcast by a WLAN beaconing device over the operating channel of the WLAN device. The special action frames may carry information on one or more channels used by a near-by radar and recommended alternative channels to use by the WLAN device.
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公开(公告)号：WO2019209466A1
公开(公告)日：2019-10-31
申请号：PCT/US2019/025117
申请日：2019-04-01
摘要： A semiconductor device for a USB Type-C cable includes a first terminal to couple to a first VCONN line from a first end of the cable, a second terminal to couple to a second VCONN line from the second end of the cable, a charge pump, and a switch circuit coupled to the first terminal and the second terminal. The switch circuit includes a first drain-extended n-type field effect transistor (DENFET) coupled between the first terminal and an internal power supply of the semiconductor device; a first pump switch coupled between the charge pump and a gate of the first DENFET; a second DENFET coupled between the second terminal and the internal power supply; and a second pump switch coupled between the charge pump and a gate of the second DENFET.
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公开(公告)号：WO2019055316A1
公开(公告)日：2019-03-21
申请号：PCT/US2018/050035
申请日：2018-09-07
摘要： A method, apparatus, and system measure, at a first channel of a processing device, a first signal indicative of a touch object proximate to an electrode layer. The first signal includes a touch data component and a first noise component generated by a noise source. The method, apparatus, and system measure, at a second channel of the processing device, a second signal including a second noise component generated by the noise source. The second channel is coupled to a shield layer disposed between the noise source and the electrode layer. The method, apparatus, and system generate an estimated noise signal using the second noise component of the second signal that is associated with the second channel. The method, apparatus, and system subtract the estimated noise signal from the measured first signal to obtain the touch data component of the first signal.
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公开(公告)号：WO2018231469A1
公开(公告)日：2018-12-20
申请号：PCT/US2018/034169
申请日：2018-05-23
发明人： ZOPF, Robert
IPC分类号： G10L11/00 , G10L19/005 , G10L19/008 , G10L19/018
摘要： In a reliable multi-cast, a concealment scheme may be applied to recover or conceal lost or otherwise corrupted packets of audio information for one channel based on the audio information of other channels in the reliable multi-cast.
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