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公开(公告)号：US20240235494A1
公开(公告)日：2024-07-11
申请号：US18404711
申请日：2024-01-04
CPC分类号： H03F1/42 , H03F3/45475 , H03F2200/129 , H03F2200/36
摘要： This disclosure provides methods, devices, and systems for operational amplifier frequency compensation. The present implementations more specifically relate to techniques for dynamically calibrating the capacitance of a compensation capacitor based on the frequency at which an operational amplifier oscillates. In some aspects, an operational amplifier may include a differential input stage, a high gain stage, and a frequency compensation controller configured to operate the operational amplifier in a normal mode or a calibration mode. Compensation capacitors are switchably coupled between the outputs of the differential input stage and the outputs of the high gain stage based on the operating mode of the operational amplifier. More specifically, in the calibration mode, the coupling of the capacitors causes an output voltage of the op amp to oscillate relative to an input voltage. By contrast, in the normal mode, the coupling of the capacitors causes the output voltage to track the input voltage.
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公开(公告)号：US20190181688A1
公开(公告)日：2019-06-13
申请号：US16275251
申请日：2019-02-13
摘要： Method and apparatus for wirelessly transmitting and receiving power between devices are provided. A first device may convert power into RF energy and transmit the RF energy to a second device. In some implementations, the first device may steer the RF energy using beamforming techniques to the second device. The second device may receive and convert the RF energy into power for the second device. In some implementations, the second device may be powered solely or in part by power transmitted by the first device. In some implementations, the first device may include two or more RF energy harvesters and a power combiner. The power combiner may combine power from the two or more RF energy harvesters to power the second device and/or charge a battery.
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公开(公告)号：US20190181687A1
公开(公告)日：2019-06-13
申请号：US16275217
申请日：2019-02-13
摘要： Method and apparatus for wirelessly transmitting and receiving power between devices are provided. A first device may convert power into RF energy and transmit the RF energy to a second device. In some implementations, the first device may steer the RF energy using beamforming techniques to the second device. The second device may receive and convert the RF energy into power for the second device. In some implementations, the second device may be powered solely or in part by power transmitted by the first device. In some implementations, the first device may include two or more RF energy harvesters and a power combiner. The power combiner may combine power from the two or more RF energy harvesters to power the second device and/or charge a battery.
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公开(公告)号：US20240231408A1
公开(公告)日：2024-07-11
申请号：US18543801
申请日：2023-12-18
IPC分类号： G05F1/67
CPC分类号： G05F1/67
摘要： Systems and methods for energy harvesting are disclosed. An example method is performed by a computing device coupled to an energy harvesting circuit and includes identifying a first time period required for the energy harvesting circuit to complete a first number of energy extraction events, the first time associated with an initial harvest voltage, determining a first value of an estimated extracted power based on the initial harvest voltage and the first number of energy extraction events, and iteratively adjusting the harvest voltage and determining the optimal harvest voltage based at least in part on values of the estimated extracted power value corresponding to the adjusted harvest voltage.
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公开(公告)号：US20190281555A1
公开(公告)日：2019-09-12
申请号：US15916728
申请日：2018-03-09
摘要： Method and apparatus for controlling the power consumption of a wireless device are provided. A wireless device may include a configurable radio frequency (RF) front-end that may be configured to use fewer hardware stages and/or processing steps to reduce power consumption based at least in part on a signal quality, detected interference, or system information associated with a received RF signal. In some implementations, the configurable RF front-end may be configured to consume less power while receiving strong RF signals and configured to consume more power while receiving weak RF signals.
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公开(公告)号：US20240219948A1
公开(公告)日：2024-07-04
申请号：US18532986
申请日：2023-12-07
发明人： Manolis Terrovitis
IPC分类号： G05F3/08
CPC分类号： G05F3/08
摘要： Implementations are disclosed for a power switching regulator defined to be used for power harvesting but is instead configured to include an additional power rail. A switching regulator includes a first contact defined as a first power input to the switching regulator (with the first contact coupled to a first power source), a second contact defined as a second power input to the switching regulator (with the second contact defined to be coupled to a harvester), and a third contact whose output is defined as a storage voltage for harvesting. Instead of the third contact being used for outputting a storage voltage for harvesting, the third contact is coupled to a voltage (VSTORE) power rail for providing power (that may be configurable) to one or more electronic components of the electronic device (such as a CPU to perform dynamic voltage scaling or by a power amplifier sensitive to power efficiency).
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公开(公告)号：US20190181685A1
公开(公告)日：2019-06-13
申请号：US15836504
申请日：2017-12-08
摘要： Method and apparatus for wirelessly transmitting and receiving power between devices are provided. A first device may convert power into RF energy and transmit the RF energy to a second device. In some implementations, the first device may steer the RF energy using beamforming techniques to the second device. The second device may receive and convert the RF energy into power for the second device. In some implementations, the second device may be powered solely or in part by power transmitted by the first device. In some implementations, the first device may include two or more RF energy harvesters and a power combiner. The power combiner may combine power from the two or more RF energy harvesters to power the second device and/or charge a battery.
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公开(公告)号：US20240235240A1
公开(公告)日：2024-07-11
申请号：US18127190
申请日：2023-03-28
CPC分类号： H02J7/007182 , H02J7/00032 , H02J7/0063 , H02J7/345 , H02J7/35 , H02J9/04 , H02J50/001 , H02J50/20
摘要： A method for powering a wireless device includes determining a presence or absence of a USB power source connected to the wireless device, determining a presence or absence of a battery connected to the wireless device, obtaining a level of energy harvested from a surrounding environment of the wireless device, and powering a load of the wireless device using one of the USB power source, the battery, or the harvested energy based on the presence or absence of the USB power source, the presence or absence of the battery, and the harvested energy level.
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公开(公告)号：US20240235234A1
公开(公告)日：2024-07-11
申请号：US18124974
申请日：2023-03-22
IPC分类号： H02J7/00 , G05F1/56 , H01M10/0525 , H01M10/42 , H01M10/44 , H01M50/109 , H02J7/34 , H02J50/00 , H02J50/20 , H02J50/80
CPC分类号： H02J7/007 , G05F1/56 , H01M10/0525 , H01M10/4264 , H01M10/44 , H01M50/109 , H02J7/345 , H02J50/001 , H02J50/20 , H02J50/80 , H01M2220/30 , H02J2207/20
摘要： A wireless device includes an energy harvester configured to convert energy harvested from radio-frequency (RF) signals into a harvested voltage, a storage capacitor to store a voltage, a first port selectively connected to an external USB power source, a second port connected to a battery, a load including a non-volatile memory storing configuration data indicating a plurality of charging configurations, and a power management circuit including a controller and a switcher matrix. The controller is configured to select one of the plurality of charging configurations based on one or more of a presence of a connection with the external USB power source, a type of the battery, an amount of the harvested voltage, or a level of the voltage stored on the storage capacitor. The switcher matrix is configured to charge the battery based on the selected charging configuration.
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公开(公告)号：US10862343B2
公开(公告)日：2020-12-08
申请号：US16275251
申请日：2019-02-13
摘要： Method and apparatus for wirelessly transmitting and receiving power between devices are provided. A first device may convert power into RF energy and transmit the RF energy to a second device. In some implementations, the first device may steer the RF energy using beamforming techniques to the second device. The second device may receive and convert the RF energy into power for the second device. In some implementations, the second device may be powered solely or in part by power transmitted by the first device. In some implementations, the first device may include two or more RF energy harvesters and a power combiner. The power combiner may combine power from the two or more RF energy harvesters to power the second device and/or charge a battery.
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