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公开(公告)号：US10911045B1
公开(公告)日：2021-02-02
申请号：US17005350
申请日：2020-08-28
IPC: H03K17/687
Abstract: A segmented direct gate drive circuit of a depletion mode GaN power device, a gate voltage of the GaN power device is charged from a negative voltage turn-off level to a threshold voltage of the GaN power device; when the gate voltage of the GaN power device is charged to the threshold voltage of the GaN power device, a current mirror charging module first turns on less than N of charging current mirror modules to charge the gate voltage of the GaN power device from the threshold voltage of the GaN power device to a Miller platform voltage of the GaN power device, and turns on N charging current mirror modules to charge the gate voltage of the GaN power device from the Miller platform voltage of the GaN power device to a zero level.
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72.发明申请公开(公告)号：US20210029816A1
公开(公告)日：2021-01-28
申请号：US16935200
申请日：2020-07-22
Inventor： Wenjie FU , Chaoyang ZHANG , Cong NIE , Xiaoyun LI , Yang YAN
IPC: H05H1/46
Abstract: A compound double coaxial line atmospheric pressure low-temperature microwave plasma jet source includes an outer coaxial line, and an inner coaxial line arranged inside the outer coaxial line. The outer coaxial line includes a tube body. A metal tube is arranged in the tube body. A short-circuit plunger is arranged at the bottom of the metal tube. The inner coaxial line includes a needle electrode, and the needle electrode is arranged in the metal tube. A first gas inlet is arranged on the tube body, and the first gas inlet is connected between the tube body and the metal tube. A second gas inlet is arranged at the bottom of the metal tube, and the second gas inlet is connected between the metal tube and the needle electrode. The tube body is further provided with a microwave input port, and the microwave input port is connected to the metal tube.
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公开(公告)号：US10823762B2
公开(公告)日：2020-11-03
申请号：US16005763
申请日：2018-06-12
Inventor： Qinchuan Zhang , Feng Tan , Huiqing Pan , Hao Zeng , Luonan Zheng
IPC: G01R13/02
Abstract: The present invention provides a method and apparatus for automatically adjusting the hold-off time of a DSO based on real-time cycle measurements of the system trigger signal: obtaining a cycle sequence by measuring the system trigger signal, the maximum cycle and minimum cycle, then judging the difference of the maximum cycle and minimum cycle: if the difference is greater than a threshold set by user, setting the hold-off time to the maximum cycle, the minimum cycle or the median cycle, then returning; otherwise terminating the adjustment of the hold-off time. At this point, the hold-off time is correctly set. Therefore, the present invention reduces the complexity and time consumption of the hold-off adjustment, and allows the test signal to be quickly and stably displayed on screen of DSO, meanwhile, which makes the trigger adjustment of DSO more convenient.
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公开(公告)号：US20200341301A1
公开(公告)日：2020-10-29
申请号：US16502514
申请日：2019-07-03
Inventor： Lichuan Jin , Kancheng Jia , Dainan Zhang , Huaiwu Zhang , Zhiyong Zhong , Qinghui Yang , Xiaoli Tang , Feiming Bai
Abstract: The present invention relates to the technical field of superlattice magneto-optical material technologies, and in particular, to a superlattice material, and a preparation method and application thereof. According to description of embodiments, the superlattice material provided in the present invention has both a relatively good magnetic property of a ferrous garnet material and a good photoelectric absorption characteristic of a two-dimensional semiconductor material such as graphene. Magneto-optical Kerr effect data obtained through testing shows that: A saturated magneto-optical Kerr angle of the superlattice material in the present invention is 13 mdeg in a magnetic field of 2500 Oe, and a magneto-optical Kerr angle of the superlattice material is increased by 2.5 times compared with a nonsuperlattice ferrimagnetic thin film material into which no two-dimensional material is inserted, thereby achieving magneto-optical effect enhancement.
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公开(公告)号：US20200259235A1
公开(公告)日：2020-08-13
申请号：US16858750
申请日：2020-04-27
Inventor： Yaxin Zhang , Shixiong Liang , Xilin Zhang , Ziqiang Yang Yang , Zhihong Feng
Abstract: A high-electron mobility transistor (HEMT) array terahertz wave modulator loaded in a waveguide is provided, which belongs to the technical field of electromagnetic functional devices and focuses on fast dynamic functional devices in the terahertz band. The device comprises a waveguide cavity and a modulation chip. The modulation chip comprises a semiconductor material substrate, a heterostructure material epitaxial layer, an artificial microstructure, and a socket circuit. The applied voltage controls the distribution change of the two-dimensional electron gas in the HEMT, which in turn controls the resonance mode conversion in the artificial microstructure, thereby control the transmission of electromagnetic waves in the waveguide. The modulator has a modulation depth of up to 96% and a modulation rate above 2 GHz. The invention can be realized by using micro-processing technology, and the preparation process is mature and reliable.
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Patent Agency Ranking
公开(公告)号：US10670467B2
公开(公告)日：2020-06-02
申请号：US15865297
申请日：2018-01-09
Inventor： Chao Wang , Jun Hu , Fei Wang , Zezhan Zhang , Jing Jiang , Jie Xiong , Yueming Wang , Tiezhong Ma , Dong Yan , Xueke Gou , Ting Zhou , Yi Niu , Pei Huang
Abstract: A device for measuring surface-temperature of a turbine blade, the device including a probe having a front-end mirror for receiving infrared radiation of a surface on the blade, a collimation lens for refracted the infrared radiation, a PD detector to receive the infrared radiation, and a focal-length servo; and a radial-scanning servo connected to the probe. The front-end mirror, the collimation lens, and PD detector are disposed along the optical axis of the collimation lens. The focal-length servo is adapted to move the collimation lens along the optical axis of the collimation lens. The radial-scanning servo is adapted to move the probe along the optical axis of the collimation lens. The device of the invention is capable of accurately targeting a particular point on the blade having an irregular shape for temperature measurement to accurately detect the temperature distribution on the surface of the blade.
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公开(公告)号：US10670464B2
公开(公告)日：2020-06-02
申请号：US15871033
申请日：2018-01-14
Inventor： Chao Wang , Ying Duan , Jun Hu , Zezhan Zhang , Yang Yang , Xueke Gou , Fei Wang , Jing Jiang , Jinguang Lv , Yueming Wang , Hongchuan Jiang , Li Du , Jiexiong Ding , Jingqiu Liang , Xianfu Liu , Xiaojiang Shi , Bing Xiong
Abstract: A method of collecting radiation information of a turbine blade, the method including: 1) collecting a radiated light from the surface of the turbine blade, analyzing the radiated light using a spectrometer to calculate compositions and corresponding concentrations of combustion gas; 2) calculating an absorption coefficient of the combustion gas at different concentrations; 3) calculating a total absorption rate of the combustion gas at different radiation wavelengths under different concentrations of component gases; 4) obtaining a relationship between the radiation and a wavelength; 5) finding at least 3 bands with a least gas absorption rate; 6) calculating a distance between a wavelength of a strongest radiation point of the turbine blade and the center wavelength, and selecting three central wavelengths closest to the wavelength with the strongest radiation; and 7) acquiring radiation data of the turbine blade in the windows obtained in 6).
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公开(公告)号：US10564012B2
公开(公告)日：2020-02-18
申请号：US15874672
申请日：2018-01-18
Inventor： Zinan Wang , Ji Xiong , Lianlian Xie , Yunjiang Rao
Abstract: A method of improving measurement speed of distributed optical fiber sensors by adopting orthogonal signals and the system thereof is disclosed, which is related to the optical fiber sensor field and solves the problems that conventional technology will increasing the bandwidth of the received signal, reducing the signal-to-noise ratio of the received signal or distortion the spatial resolution of the system. The method comprises steps of generating N periodic orthogonal optical pulse sequence; injecting the N periodic orthogonal optical pulse sequence into the optical fiber under test(5); collecting the scattered light signal; demodulating the scattered light signal with the local oscillating light and then converting into digital signals; extracting the scatter information of the orthogonal optical pulses from the collected digital signals; and arranging the scattered information in order of precedence of the infusion. The measurement speed of the distributed optical fiber sensors is improved by N−1 times.
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公开(公告)号：US10530258B1
公开(公告)日：2020-01-07
申请号：US16392664
申请日：2019-04-24
Inventor： Zekun Zhou , Yunkun Wang , Yandong Yuan , Shilei Li , Zhuo Wang , Bo Zhang
Abstract: A predictive dead time generating circuit includes a dead time detecting module configured to detect a dead time between the switching off of the upper power transistor and the switching on of the lower power transistor, and a dead time between the switching off of the lower power transistor and the switching on of the upper power transistor, and to generate a first detecting signal and a second detecting signal according to the condition of whether the detected dead time reaches an optimal value. The logic control module changes the output of the delay module according to the judgment result of the dead time detecting module, so as to change the dead time between the driving signal of the upper power transistor and the driving signal of the lower power transistor.
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公开(公告)号：US20190392551A1
公开(公告)日：2019-12-26
申请号：US16435465
申请日：2019-06-08
Inventor： Wuhuang HUANG , Pan WANG , Jun JIANG , Peng YE , Kuojun YANG , Lianping GUO , Hao ZENG , Shuo WANG , Jian GAO
Abstract: The present invention provides a method for 3D waveform mapping of full-parallel structure, first, a 3D waveform mapping database is created according to the size of a 3D waveform image, the number of bits of probability value and the ADC's resolution of data acquisition module, then the 3D waveform mapping database is divided into Mt×Ma independent mapping storage areas along the time axis and the amplitude axis, and each independent mapping storage area is assigned a RAM, then RAMs are selected and addresses are calculated based on the sampling values and the structure of created 3D waveform mapping database, finally, parallel mappings are performed simultaneously on the time axis and the amplitude axis according to the selected RAMs and calculated addresses. Thus, the mapping time are shorten, especially in vector mapping mode, several RAMs are used for mapping, so the WCR of DSO is improved.
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