Patents by Inventor Longxing Shi

Longxing Shi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20150331799
    Abstract: Disclosed are a pre-decoding analysis-based configuration information cache management system, comprising a streaming media processing module, a configuration information prefetch FIFO module, a configuration information storage unit, and a cache controller module. Also disclosed is a management method for the pre-decoding analysis-based configuration information cache management system. The present invention allows for increased dynamic reconfiguration efficiency of a large-scale coarse-grained reconfigurable system.
    Type: Application
    Filed: November 13, 2013
    Publication date: November 19, 2015
    Applicant: Southeast University
    Inventors: Peng Cao, Jun Yang, Longxing Shi, Bo Liu, Jinjiang Yang, Leibo Liu, Shouyi Yin, Shaojun Wei
  • Publication number: 20150309897
    Abstract: Disclosed is an error recovery circuit facing a CPU assembly line, comprising: on-chip monitoring circuits (1), an error signal statistics module (2), a voltage frequency control module (3), an error recovery control module (4), an in-situ error recovery module (5) and an upper-layer error recovery module (6), wherein each of the on-chip monitoring circuits (1) is integrated at the end of each stage of assembly lines of the previous N?1 stages of assembly lines of a CPU kernel with an N-stage assembly line structure, so as to monitor the time sequence information about each clock period of an operating circuit, wherein N is a positive integer which is greater than or equal to 3 and less than 20.
    Type: Application
    Filed: August 30, 2013
    Publication date: October 29, 2015
    Inventors: Weiwei SHAN, Chaoxuan TIAN, Huafang SUN, Longxing SHI
  • Patent number: 9159818
    Abstract: A high-current, N-type silicon-on-insulator lateral insulated-gate bipolar transistor, including: a P-type substrate, a buried-oxide layer disposed on the P-type substrate, an N-type epitaxial layer disposed on the oxide layer, and an N-type buffer trap region. A P-type body region and an N-type central buffer trap region are disposed inside the N-type epitaxial layer; a P-type drain region is disposed in the buffer trap region; N-type source regions and a P-type body contact region are disposed in the P-type body region; an N-type base region and a P-type emitter region are disposed in the buffer trap region; gate and field oxide layers are disposed on the N-type epitaxial layer; polycrystalline silicon gates are disposed on the gate oxide layers; and a passivation layer and metal layers are disposed on the surface of the symmetrical transistor. P-type emitter region output and current density are improved without increasing the area of the transistor.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: October 13, 2015
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Weifeng Sun, Siyang Liu, Jing Zhu, Qinsong Qian, Shen Xu, Shengli Lu, Longxing Shi
  • Publication number: 20150270377
    Abstract: A transverse ultra-thin insulated gate bipolar transistor having current density includes: a P substrate, where the P substrate is provided with a buried oxide layer thereon, the buried oxide layer is provided with an N epitaxial layer thereon, the N epitaxial layer is provided with an N well region and P base region therein, the P base region is provided with a first P contact region and an N source region therein, the N well region is provided with an N buffer region therein, the N well region is provided with a field oxide layer thereon, the N buffer region is provided with a P drain region therein, the N epitaxial layer is provided therein with a P base region array including a P annular base region, the P base region array is located between the N well region and the P base region, the P annular base region is provided with a second P contact region and an N annular source region therein, and the second P contact region is located in the N annular source region.
    Type: Application
    Filed: December 27, 2012
    Publication date: September 24, 2015
    Inventors: Weifeng Sun, Jing Zhu, Shen Xu, Qinsong Qian, Siyang Liu, Shengli Lu, Longxing Shi
  • Publication number: 20150254180
    Abstract: Disclosed is a cache structure for use in implementing reconfigurable system configuration information storage, comprising: layered configuration information cache units: for use in caching configuration information that may be used by a certain or several reconfigurable arrays within a period of time; an off-chip memory interface module: for use in establishing communication; a configuration anagement unit: for use in managing a reconfiguration process of the reconfigurable arrays, in mapping each subtask in an algorithm application to a certain reconfigurable array, thus the reconfigurable array will, on the basis of the mapped subtask, load the corresponding configuration information to complete a function reconfiguration for the reconfigurable array. This increases the utilization efficiency of configuration information caches.
    Type: Application
    Filed: November 13, 2013
    Publication date: September 10, 2015
    Inventors: Longxing Shi, Jun Yang, Peng Cao, Bo Liu, Jinjiang Yang, Leibo Liu, Shouyi Yin, Shaojun Wei
  • Patent number: 9048820
    Abstract: A high-speed fully differential clock duty cycle calibration circuit applied to calibrating the clock duty cycle in a high-speed system. The circuit detects the duty cycle with a continuous time integrator, and directly adjusts the duty cycle on a clock transmission link so as to increase the working speed. Being of a fully differential circuit structure, the circuit can calibrate the duty cycle under a designated process within a higher and wider frequency range, and has relatively good constraining force for process mismatch and common mode noise. The circuit comprises adjustment level ADJ1 and ADJ2, a first buffer level BUF1, a second buffer level BUF2 and a duty cycle detection level DCD.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: June 2, 2015
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Longxing Shi, Danhong Gu, Junhui Gu, Jianhui Wu, Wei Zhao, Zhiyi Ye, Dahai Hu, Meng Zhang, Hong Li
  • Patent number: 8933534
    Abstract: An isolation structure of a high-voltage driving circuit includes a P-type substrate and a P-type epitaxial layer; a high voltage area, a low voltage area and a high and low voltage junction terminal area are arranged on the P-type epitaxial layer; a first P-type junction isolation area is arranged between the high and low voltage junction terminal area and the low voltage area, and a high-voltage insulated gate field effect tube is arranged between the high voltage area and the low voltage area; two sides of the high-voltage insulated gate field effect tube and an isolation structure between the high-voltage insulated gate field effect tube and a high side area are formed as a second P-type junction isolation area.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: January 13, 2015
    Assignee: Southeast University
    Inventors: Longxing Shi, Qinsong Qian, Weifeng Sun, Jing Zhu, Xianguo Huang, Shengli Lu
  • Publication number: 20150008971
    Abstract: Disclosed is a noise current compensation circuit. The circuit is provided with two input and output terminals A and B, and two control terminals CON and CONF. The control terminals control a work mode (work state and pre-charge state) of the compensation circuit. The compensation circuit consists of 7 PMOS transistors and 8 NMOS transistors. In the normal work state, by detecting changes of potential change rate of two signal lines in an original circuit, the noise current compensation circuit automatically enables one end of the original circuit that discharges slowly to discharge a signal more slowly, and enables one end of the original circuit that discharges rapidly to discharge a signal more rapidly, thus eliminating the influence of the noise current on the circuit and providing assistance for correct identification of subsequent circuit signals.
    Type: Application
    Filed: December 27, 2012
    Publication date: January 8, 2015
    Inventors: Na Bai, Longxing Shi, Jun Yang, Xinning Liu, Jiafeng Zhu, Yue Feng, Cai Gong, Fei Pan, Hong Chang, Yifeng Deng, Yuan Chen, Yingcheng Xia
  • Patent number: 8922265
    Abstract: Disclosed is a noise current compensation circuit. The circuit is provided with two input and output terminals A and B, and two control terminals CON and CONF. The control terminals control a work mode (work state and pre-charge state) of the compensation circuit. The compensation circuit consists of 7 PMOS transistors and 8 NMOS transistors. In the normal work state, by detecting changes of potential change rate of two signal lines in an original circuit, the noise current compensation circuit automatically enables one end of the original circuit that discharges slowly to discharge a signal more slowly, and enables one end of the original circuit that discharges rapidly to discharge a signal more rapidly, thus eliminating the influence of the noise current on the circuit and providing assistance for correct identification of subsequent circuit signals.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: December 30, 2014
    Assignee: Southeast University
    Inventors: Na Bai, Longxing Shi, Jun Yang, Xinning Liu, Jiafeng Zhu, Yue Feng, Cai Gong, Fei Pan, Hong Chang, Yifeng Deng, Yuan Chen, Yingcheng Xia
  • Publication number: 20140376305
    Abstract: The present invention discloses a circuit for improving process robustness of sub-threshold SRAM memory cells, which serves as an auxiliary circuit for a sub-threshold SRAM memory cell. The output of the circuit is connected to the PMOS tube of the sub-threshold SRAM memory cell and the substrate of a PMOS tube in the circuit. The circuit comprises a detection circuit for threshold voltage of PMOS tube and a differential input and single-ended output amplifier. The circuit changes the substrate voltage of the PMOS tubes in the sub-threshold SRAM memory cell and the substrate voltage of the PMOS tube in the circuit in a self-adapting manner by detecting threshold voltage fluctuations of PMOS tubes and NMOS tubes resulted from process fluctuations and thereby regulate the threshold voltages of the PMOS tubes, so that the threshold voltage of PMOS tubes matches the threshold voltage of NMOS tubes.
    Type: Application
    Filed: December 27, 2012
    Publication date: December 25, 2014
    Inventors: Na Bai, Longxing Shi, Jun Yang, Xinning Liu, Jiafeng Zhu, Yue Feng, Cai Gong, Fei Pan, Hong Chang, Yifeng Deng, Yuan Chen, Yingcheng Xia
  • Patent number: 8909999
    Abstract: A dynamic voltage scaling system based on on-chip monitoring and voltage prediction is disclosed, comprising a main circuit that has integrated on-chip monitoring circuits, a supply voltage scaling module, and voltage converters, wherein, the supply voltage scaling module comprises a sampling and statistics module designed to calculate the error rate of the main circuit in the current time slice, a state recording module designed to record the error rate and the corresponding supply voltage, an error prediction module, and a state transition probability generation module; the error prediction module predicts the error trend of the main circuit in a future time slice according to the state recording module and the state transition probability generation module, and generates regulation signals and sends to the corresponding voltage converters, so as to generate the voltage required for operation of the entire main circuit.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: December 9, 2014
    Assignee: Southeast University
    Inventors: Longxing Shi, Weiwei Shan, Jun Yang, Haolin Gu, Xinning Liu, Yang Zhang
  • Publication number: 20140306266
    Abstract: A high-current, N-type silicon-on-insulator lateral insulated-gate bipolar transistor, including: a P-type substrate, a buried-oxide layer disposed on the P-type substrate, an N-type epitaxial layer disposed on the oxide layer, and an N-type buffer trap region. A P-type body region and an N-type central buffer trap region are disposed inside the N-type epitaxial layer; a P-type drain region is disposed in the buffer trap region; N-type source regions and a P-type body contact region are disposed in the P-type body region; an N-type base region and a P-type emitter region are disposed in the buffer trap region; gate and field oxide layers are disposed on the N-type epitaxial layer; polycrystalline silicon gates are disposed on the gate oxide layers; and a passivation layer and metal layers are disposed on the surface of the symmetrical transistor. P-type emitter region output and current density are improved without increasing the area of the transistor.
    Type: Application
    Filed: October 24, 2012
    Publication date: October 16, 2014
    Inventors: Weifeng Sun, Siyang Liu, Jing Zhu, Qinsong Qian, Shen Xu, Shengli Lu, Longxing Shi
  • Patent number: 8803580
    Abstract: The present invention discloses a Power-On-Reset (POR) circuit with zero steady-state current consumption and stable pull-up voltage. The POR circuit achieves zero steady-state current consumption during steady operation after the POR process by cutting off a power supply to a band-gap comparator circuit and a current comparator circuit after the POR process. The present invention has high reliability and stable pull-up voltage, is less susceptible to the impact of power-on rate of power supply, temperature, and process variation, has very low steady-state power consumption, and can be integrated in a SOC chip in low-power consumption applications.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: August 12, 2014
    Assignee: Southeast University
    Inventors: Longxing Shi, Weiwei Shan, Peng Cao, Na Bai, Xuexiang Wang, Tao Zhao
  • Publication number: 20140203406
    Abstract: An isolation structure of a high-voltage driving circuit includes a P-type substrate and a P-type epitaxial layer; a high voltage area, a low voltage area and a high and low voltage junction terminal area are arranged on the P-type epitaxial layer; a first P-type junction isolation area is arranged between the high and low voltage junction terminal area and the low voltage area, and a high-voltage insulated gate field effect tube is arranged between the high voltage area and the low voltage area; two sides of the high-voltage insulated gate field effect tube and an isolation structure between the high-voltage insulated gate field effect tube and a high side area are formed as a second P-type junction isolation area.
    Type: Application
    Filed: August 14, 2012
    Publication date: July 24, 2014
    Inventors: Longxing Shi, Qinsong Qian, Weifeng Sun, Jing Zhu, Xianguo Huang, Shengli Lu
  • Patent number: 8766698
    Abstract: A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: July 1, 2014
    Assignee: Southeast University
    Inventors: Jianhui Wu, Chao Chen, Hong Li, Longxing Shi, Zixuan Wang, Jie Sun, Zhiyi Ye, Meng Zhang
  • Patent number: 8754442
    Abstract: A silicon on insulator N type semiconductor device, includes a N type drift region, a P type deep well, an N type buffer well, a P type drain region, an N type source region and a P type body contact region; a field oxide layer and a gate oxide layer arranged on a silicon surface, and a polysilicon lattice arranged on the gate oxide layer; and an N type triode drift region, a P type deep well, an N type triode buffer well, a P type emitting region, an N type base region, an N type source region and a P type body contact region; a field oxide layer and a gate oxide layer arranged on a silicon surface, and a polysilicon lattice arranged on the gate oxide layer.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: June 17, 2014
    Assignee: Southeast University
    Inventors: Longxing Shi, Qinsong Qian, Changlong Huo, Weifeng Sun, Shengli Lu
  • Patent number: 8723496
    Abstract: A switching power supply with a quick transient response is provided. A hysteretic control loop which comprises a hysteretic controller (117) and a control signal gate (116) is added to the original PWM control loop of the switching power supply. The hysteretic controller (117) is used to detect an output voltage (Vout) of the switching power supply and compare the output voltage (Vout) of the switching power supply with a reference voltage (Vref). When a load current (Iout) of the switching power supply is suddenly changed, the output voltage (Vout) of the switching power supply fluctuates. If the output voltage (Vout) of the switching power supply is in a setting range of the hysteretic voltage, output terminals (SELp, SELn) of the hysteretic controller (117) are in a low potential, and the control signal gate (116) selects output signals (Qp1, Qn1) from a PWM controller (101) as input signals of a gate signal drive circuit (106).
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: May 13, 2014
    Assignee: Southeast University
    Inventors: Weifeng Sun, Miao Yang, Youshan Jin, Sichao Liu, Shen Xu, Shengli Lu, Longxing Shi
  • Publication number: 20140097873
    Abstract: The present invention discloses a Power-On-Reset (POR) circuit with zero steady-state current consumption and stable pull-up voltage. The POR circuit achieves zero steady-state current consumption during steady operation after the POR process by cutting off a power supply to a band-gap comparator circuit and a current comparator circuit after the POR process. The present invention has high reliability and stable pull-up voltage, is less susceptible to the impact of power-on rate of power supply, temperature, and process variation, has very low steady-state power consumption, and can be integrated in a SOC chip in low-power consumption applications.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 10, 2014
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Longxing Shi, Welwei Shan, Peng Cao, Na Bai, Xuexiang Wang, Tao Zhao
  • Patent number: 8659345
    Abstract: A switch level circuit (110) with dead time self-adapting control, which minimizes the switching loss in a switching power supply converter with synchronous rectification by changing a dead time between a high-side control transistor (10) and a low-side synchronous rectifying transistor (11). The switch level circuit (110) includes the high-side control transistor (10) and the low-side synchronous rectifying transistor (11) which are controlled to be on and off by external control signals, and a waveform with a given duty cycle is outputted at a node (LX) between the two transistors. The switch level circuit (110) also includes a control module for adjusting the dead time.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: February 25, 2014
    Assignee: Southeast University
    Inventors: Shen Xu, Weifeng Sun, Miao Yang, Sichao Liu, Youshan Jin, Shengli Lu, Longxing Shi
  • Publication number: 20140002158
    Abstract: A high-speed fully differential clock duty cycle calibration circuit applied to calibrating the clock duty cycle in a high-speed system. The circuit detects the duty cycle with a continuous time integrator, and directly adjusts the duty cycle on a clock transmission link so as to increase the working speed. Being of a fully differential circuit structure, the circuit can calibrate the duty cycle under a designated process within a higher and wider frequency range, and has relatively good constraining force for process mismatch and common mode noise. The circuit comprises adjustment level ADJ1 and ADJ2, a first buffer level BUF1, a second buffer level BUF2 and a duty cycle detection level DCD.
    Type: Application
    Filed: August 18, 2011
    Publication date: January 2, 2014
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Longxing Shi, Danhong Gu, Junhui Gu, Jianhui Wu, Wei Zhao, Zhiyi Ye, Dahai Hu, Meng Zhang, Hong Li