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11. 发明申请

US20230074921A1 Hybrid Analog/Digital Phase Locked Loop with Fast Frequency Changes 有权
公开(公告)号：US20230074921A1
公开(公告)日：2023-03-09
申请号：US17800480
申请日：2020-02-21
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Henrik Sjöland , Razvan-Cristian Marin
IPC分类号： H03L7/099 , H03L7/089 , H03L7/093 , H04B1/40
摘要： A hybrid Phase Locked Loop, PLL (10, 34A, 34B, 38) employs an analog control loop during a first period of operation, such as steady-state operation, to achieve a simple design, stable operation at very high frequency, and low phase noise. During a second period of operation, such as frequency changes, a digital control loop takes over. Under digital control, charge pump (14) inputs are forced to be at or near 100% duty cycle for maximum loop filter (16) charging and fast, linear frequency change. The digital control loop monitors when the target frequency is reached, and exits the second period of operation with the proper feedback signal phase. The digital control loop can operate in two control modes. In a first mode, the phase of the divided VCO output signal is synchronized with the phase of a periodic reference signal throughout the frequency change. In a second mode, the frequency and phase are controlled in separate steps, by controlling the integer and fractional parts of delta-sigma generated division number. Three embodiments are disclosed. In a first embodiment, a switch substitutes constant charge pump (14) inputs for the outputs of a phase frequency detector, PFD (12) to maximize the loop filter (16) current. In a second embodiment, one pulse of one of the periodic signals is suppressed, forcing the PFD (12) to output charge pump input signals at near 100% duty cycle. In a third embodiment, all the cycles of one of the periodic signals are suppressed, forcing PFD (12) output signals to 100% duty cycle.

12. 发明申请

US20230073655A1 JUMP-START POWER AMPLIFIER BOOST CONVERTER 有权
公开(公告)号：US20230073655A1
公开(公告)日：2023-03-09
申请号：US17930561
申请日：2022-09-08
申请人： SKYWORKS SOLUTIONS, INC.
发明人： Wendy Ng , James Jason LoCascio
IPC分类号： H03F1/30 , H03F3/20 , H02M1/14 , H02M3/157 , H04B1/40 , H02M3/158 , H03F3/24 , H04B1/04
摘要： A power management integrated circuit (PMIC) can improve the ramp up speed of a boost converter with the inclusion of a controllable switch that may modify the connection of an output capacitor to reduce the ramp time as the output voltage is ramping to a desired boost setpoint. The switch may be controlled using jump start logic to switch a first plate or terminal of the output capacitor from a ground connection to a voltage supply connection. Once a threshold voltage is reached, the first plate of the capacitor may be switched from the supply voltage to ground. In certain cases, by switching the connection of the output capacitor between ground and a supply voltage based on one or more threshold voltages or a boost setpoint, the time to ramp from an initial voltage to a desired boost setpoint may be reduced.

13. 发明申请

US20230072490A1 ASYMMETRIC DOHERTY POWER AMPLIFIERS 有权
公开(公告)号：US20230072490A1
公开(公告)日：2023-03-09
申请号：US17814627
申请日：2022-07-25
申请人： Skyworks Solutions, Inc.
发明人： Mingming Liu
IPC分类号： H03F1/02 , H03F3/24 , H03F1/56 , H04B1/40
摘要： Asymmetric Doherty power amplifiers are disclosed. In certain embodiments, a Doherty power amplifier includes a carrier amplifier that generates a radio frequency carrier signal based on amplifying a radio frequency input signal, a peaking amplifier that generates a radio frequency peaking signal based on amplifying the radio frequency input signal, and a phase shifting and combining circuit configured to combine the radio frequency carrier signal and the radio frequency peaking signal to generate a radio frequency output signal. The carrier amplifier and the peaking amplifier have asymmetric amplifier sizes.

14. 发明授权

US11601154B2 Multi-chip integrated circuit and interactive communication method for the same 有权
公开(公告)号：US11601154B2
公开(公告)日：2023-03-07
申请号：US17405886
申请日：2021-08-18
申请人： SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
发明人： Chuanxin Wu , Qinfen Hu
IPC分类号： H04B1/40 , H01M10/42 , H01M10/48
摘要： A multi-chip integrated circuit and an interactive communication method for the multi-chip integrated circuit are provided. The multi-chip integrated circuit includes multiple low-voltage chips connected in series with each other instead of an ultra-high voltage chip, to reduce requirements on technology for the chip. In addition, the multiple chips communicate with each other through internal communication ports based on a differential signal, to enhance reliability of communication. Two adjacent chips are connected in series and a low-voltage power supply is arranged, so that a voltage difference between communication ports of the two adjacent chips is small.

15. 发明授权

US11595075B2 Amplifier circuitry for carrier aggregation 有权
公开(公告)号：US11595075B2
公开(公告)日：2023-02-28
申请号：US17341159
申请日：2021-06-07
申请人： Apple Inc.
发明人： Seyed Mohammad Hossein Mohammadnezhad , Xi Yao , Aly Ismail
IPC分类号： H03F3/19 , H03F1/26 , H04B1/40 , H03F1/22 , H03F3/24 , H03F3/195 , H03F3/68
摘要： An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode. The common source amplifier stage may include additional switches for activating and deactivating the common source amplifier stage to help maintain the gain in the non-carrier-aggregation mode and the carrier-aggregation mode.

16. 发明申请

US20230049081A1 AUDIO NON-LINEARITY CANCELLATION FOR SWITCHES FOR AUDIO AND OTHER APPLICATIONS 有权
公开(公告)号：US20230049081A1
公开(公告)日：2023-02-16
申请号：US17974030
申请日：2022-10-26
申请人： QUALCOMM Incorporated
发明人： Kshitij YADAV , Vijayakumar DHANASEKARAN
IPC分类号： H04B1/40 , H03F3/185 , H03F3/193
摘要： An aspect includes an apparatus including a first amplifier; a first field effect transistor (FET) including a first source coupled to an output of the first amplifier, and a first drain for coupling to a first load; and a first gate drive circuit including an input coupled to the output of the first amplifier and an output coupled to a first gate of the first FET. Another aspect includes a method including amplifying a first audio signal using a first audio amplifier to generate a first voltage; generating a first gate voltage based on the first voltage; applying the first gate voltage to a first gate of a first field effect transistor (FET) coupled between the first audio amplifier and a first audio transducer; and applying the first voltage to a first source of the first FET.

17. 发明授权

US11581877B1 Negative-feedback four-phase generator with twenty-five percent duty cycle output 有权
公开(公告)号：US11581877B1
公开(公告)日：2023-02-14
申请号：US17516927
申请日：2021-11-02
申请人： NXP B. V.
发明人： Mark Stoopman , Erik Olieman , Peter van der Cammen
IPC分类号： H03K3/037 , H03K5/04 , H03K5/01 , H03H7/06 , H04B1/40 , H03F3/45 , H03K5/00
摘要： A four-phase (or multi-phase) generation circuit, related method of operation, and transceivers or other systems utilizing such a circuit, are disclosed herein. In one example embodiment, the circuit includes two input ports respectively configured to receive positive and negative differential input signals, and four output ports respectively configured to output first, second, third and fourth output signals, respectively, the second, third, and fourth output signals being respectively phase-shifted relative to the first output signal by or substantially by 90, 180, and 270 degrees. Also, the circuit includes four SR latches respectively including output terminals that are respectively coupled to the respective output ports. Further, the circuit includes two tunable delay circuits respectively coupled at least indirectly between the input ports and latches, and two comparison circuits configured to output respective feedback signals. The latches receive two delayed input signals provided by the delay circuits based upon the feedback signals.

18. 发明申请

US20230039234A1 SURGICAL INSTRUMENT WITH SINGLE WIRE DIGITAL COMMUNICATION OVER DIFFERENTIAL BUS 有权
公开(公告)号：US20230039234A1
公开(公告)日：2023-02-09
申请号：US17973591
申请日：2022-10-26
申请人： Covidien LP
发明人： Travis Jones
IPC分类号： H04L12/40 , H04B1/40
摘要： A single wire digital communication system for use with an ultrasonic surgical instrument and an ultrasonic surgical instrument including a single wire digital communication system. The single wire digital communication system includes first transmitter logic buffer and first receiver logic buffer operably coupled to a first single wire device via a first single wire communication bus. The single wire digital communication system also includes a first differential transceiver operational amplifier operably coupled to the first transmitter logic buffer via a first transmitter signal line and operably coupled to the first receiver logic buffer via a first receiver signal line. A second differential transceiver operational amplifier is operably coupled to the first differential transceiver operational amplifier via at least one differential bus. A second single wire device is operably coupled to the differential bus and configured to communicate with the first single wire device.

19. 发明申请

US20230036435A1 METHOD AND APPARATUS FOR CANCELLING FRONT-END DISTORTION 有权
公开(公告)号：US20230036435A1
公开(公告)日：2023-02-02
申请号：US17813753
申请日：2022-07-20
申请人： Marvell Asia Pte Ltd
发明人： Ray Luan Nguyen , Benjamin Tomas Reyes , Geoffrey Hatcher , Stephen Jantzi
IPC分类号： H04B1/12 , H04B1/40
摘要： Transceiver circuitry in an integrated circuit device includes a receive path including an analog front end for receiving analog signals from an analog transmission path and conditioning the analog signals, and an analog-to-digital converter configured to convert the conditioned analog signals into received digital signals for delivery to functional circuitry, and a transmit path including a digital front end configured to accept digital signals from the functional circuitry and to condition the accepted digital signals, and a digital-to-analog converter configured to convert the conditioned digital signals into analog signals for transmission onto the analog transmission path. At least one of the analog front end and the digital front end introduces distortion and outputs a distorted conditioned signal. The transceiver circuitry further includes distortion correction circuitry at the one of the analog front end and the digital front end, to determine and apply a distortion cancellation function to the distorted signal.

20. 发明授权

US11570631B2 Concentric cells in a wireless communication system 有权
公开(公告)号：US11570631B2
公开(公告)日：2023-01-31
申请号：US17167628
申请日：2021-02-04
申请人： SMARTSKY NETWORKS LLC
发明人： Douglas Hyslop , Andrew P. Caplan
IPC分类号： H04W40/00 , H04W16/30 , H04W16/24 , H01Q21/29 , H01Q1/24 , H01Q21/00 , H04B1/40 , H01Q21/28 , H01Q25/00 , H04W16/28 , H04B7/185 , H04W88/08
摘要： Aspects described herein relate to a base station for providing air-to-ground wireless communication over various altitudes. The base station includes a first antenna array comprising one or more antennas configured to form a first cell coverage area extending substantially from a horizon up to a first elevation angle away from the first antenna array to a predetermined distance from the first antenna array. The base station further includes a second antenna array configured at an uptilt elevation angle to form a second cell coverage area extending at least from the first elevation angle to a second elevation away from the second antenna array, wherein the first cell coverage area and the second cell coverage area are concentric to define the ATG cell at least to the predetermined distance and up to a predetermined elevation.

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