Patents by Inventor Dongbing Fu

Dongbing Fu 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: 20210391870
    Abstract: The present disclosure belongs to the technical field of analog or digital-analog hybrid integrated circuits, and relates to a high-speed SAR_ADC digital logic circuit, in particular to a high-speed digital logic circuit for SAR_ADC and a sampling adjustment method. The digital logic circuit includes a comparator, a logic control unit parallel to the comparator, and a capacitor array DAC. The comparator and the logic control unit are simultaneously triggered by a clock signal. The comparator outputs a valid comparison result Dp/Dn, the logic control unit outputs a corresponding rising edge signal, the rising edge signal is slightly later than Dp/Dn output by the comparator through setting a delay match, Dp/Dn is captured by the corresponding rising edge signal, thereby settling a capacitor array. The present disclosure eliminates the disadvantage of the improper settling of the capacitor array of the traditional parallel digital logic.
    Type: Application
    Filed: January 7, 2020
    Publication date: December 16, 2021
    Applicants: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION, Chongqing GigaChip Technology Co., Ltd.
    Inventors: Daiguo XU, Hequan JIANG, Xueliang XU, Jian'an WANG, Guangbing CHEN, Dongbing FU, Yuxin WANG, Xiaoquan YU, Shiliu XU, Tao LIU
  • Publication number: 20210297080
    Abstract: The present disclosure provides a low-jitter frequency division clock circuit, including: a clock control signal generation circuit, to generate clock signals having different phases; a low-level narrow pulse width clock control signal generation circuit, to generate a low-level narrow pulse width clock control signal; a high-level narrow pulse width clock control signal generation circuit, to generate a high-level narrow pulse width clock control signal; and a frequency division clock generation circuit, to generate a frequency division clock signal according to low-level narrow pulse width clock control signal and high-level narrow pulse width clock control signal. The delay from a clock input end to an output end of low-jitter frequency division clock circuit is up to three logic gates.
    Type: Application
    Filed: December 13, 2018
    Publication date: September 23, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Tao LIU, Jian'an WANG, Yuxin WANG, Guangbing CHEN, Dongbing FU, Ruzhang LI, Shengdong HU, Zhengping ZHANG, Jun LUO, Daiguo XU, Minming DENG, Yan WANG
  • Publication number: 20210281269
    Abstract: The present disclosure provides a buffer circuit and a buffer. The buffer circuit includes: an input follower circuit for following the voltage change of the first input signal; an input follower linearity boosting circuit for improving follower linearity of the input follower circuit; a first voltage bootstrap circuit for bootstrapping the voltage of the first input signal; a second voltage bootstrap circuit for bootstrapping the voltage of the second input signal; a third voltage bootstrap circuit for providing corresponding quiescent operation point voltage; a compensation follower circuit for following the compensation voltage; a compensation follower linearity boosting circuit for improving follower linearity of the compensation follower circuit; a first load for collecting the buffered voltage; a bias circuit for providing a bias current for the buffer; a bias linearity boosting circuit for improving linearity of the bias circuit; a second load for generating a nonlinear compensation current.
    Type: Application
    Filed: December 13, 2018
    Publication date: September 9, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Ting LI, Gangyi HU, Ruzhang LI, Yong ZHANG, Zhengbo HUANG, Yabo NI, Xingfa HUANG, Jian'an WANG, Guangbing CHEN, Dongbing FU, Jun YUAN, Zicheng XU
  • Publication number: 20210280513
    Abstract: The present disclosure provides a one-time programmable capacitive fuse bit, including an upper plate, the upper plate includes a plurality of fuses arranged side by side and spaced by an internal from each other, middle portions of two adjacent fuses are connected to each other; a connecting portion connected to the fuse is disposed above two ends and the middle portion of each of the plurality of fuses; the fuse bit further includes a lower plate corresponding to the two ends and the middle portion of the fuse, the lower plate is disposed below the fuse; the lower plate corresponding to the middle portion of the fuse is opposite to the connecting portion corresponding to the middle portion of the fuse; a hollow portion is disposed between the lower plate corresponding to the middle portion of the fuse and the lower plate corresponding to both ends of the fuse.
    Type: Application
    Filed: July 18, 2018
    Publication date: September 9, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Mingyuan XU, Shuiqin YAO, Liang Li, Xiaofeng SHEN, Hongrui YANG, Jian'an WANG, Dongbing FU, Guangbing CHEN, Xingfa HUANG, Xi CHEN
  • Publication number: 20210278867
    Abstract: The present disclosure provides a differential reference voltage buffer, including: a buffer stage, including at least a first transistor and a second transistor; a control circuit, connected with the buffer stage and forming a negative feedback structure for generating a differential reference voltage; a current compensation circuit for compensating a resistive load current of the control circuit; and a drive stage for generating an output differential reference voltage. The differential reference voltage is generated according to an external input reference voltage and a common mode input voltage. The common mode voltage can be set separately, so that the flexibility is high. The current generated by a resistive network in the control circuit is compensated by the current compensation circuit, so that the current of a follow device in the buffer stage is not influenced by the control circuit, thereby generating a differential reference voltage with high accuracy output.
    Type: Application
    Filed: December 13, 2018
    Publication date: September 9, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Yan WANG, Gangyi HU, Tao LIU, Jian'an WANG, Daiguo XU, Guangbing CHEN, Dongbing FU
  • Patent number: 11115039
    Abstract: The present disclosure provides a voltage-to-time converter and method for reducing parasitic capacitance and power supply influences. The voltage-to-time converter includes: a main sampling network, a compensation sampling network, a discharge network and an over-threshold detection unit. The influence of a traditional VTC parasitic capacitance on a VTC output swing amplitude is reduced by using the compensation sampling network. A sampling common-mode level of the compensation sampling network is compensated, such that the influence of the low-frequency disturbance of a power supply voltage on a threshold of a traditional VTC threshold detection circuit is reduced. The output swing amplitude of the voltage-to-time converter of the present disclosure can reduce the influence of a parasitic capacitance. A voltage common-mode level of a VTC input end is related to a power supply voltage, which reduces a conversion error caused by the influence of the power supply voltage on a threshold.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: September 7, 2021
    Assignee: No. 24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Ting Li, Zhengbo Huang, Yong Zhang, Yabo Ni, Jian'an Wang, Dongbing Fu
  • Publication number: 20210211122
    Abstract: A duty cycle adjustment apparatus comprises a first edge extraction unit for extracting a rising edge of a first clock signal; a locking discrimination unit configured to output a control signal according to a comparison result between a discrimination voltage and a stabilized voltage, and select to connect the first clock signal or the clock output signal; an integration unit, configured to convert the feedback signal into the stabilized voltage, amplify the stabilized voltage to reach a reference voltage, and output a control voltage; a charge pump, configured to output a second clock signal according to the control voltage; a second edge extraction unit, configured to extract a falling edge of the second clock signal; and a phase discriminator, configured to compare a phase of the rising edge of the first clock signal with a phase of the falling edge of the second clock signal to generate the clock output signal.
    Type: Application
    Filed: July 21, 2017
    Publication date: July 8, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Xi Chen, Liang Li, Guangbing Chen, Yuxin Wang, Dongbing Fu, Xingfa Huang, Mingyuan Xu, Xiaofeng Shen
  • Publication number: 20210203344
    Abstract: The present disclosure provides a voltage-to-time converter and method for reducing parasitic capacitance and power supply influences. The voltage-to-time converter includes: a main sampling network, a compensation sampling network, a discharge network and an over-threshold detection unit. The influence of a traditional VTC parasitic capacitance on a VTC output swing amplitude is reduced by using the compensation sampling network. A sampling common-mode level of the compensation sampling network is compensated, such that the influence of the low-frequency disturbance of a power supply voltage on a threshold of a traditional VTC threshold detection circuit is reduced. The output swing amplitude of the voltage-to-time converter of the present disclosure can reduce the influence of a parasitic capacitance. A voltage common-mode level of a VTC input end is related to a power supply voltage, which reduces a conversion error caused by the influence of the power supply voltage on a threshold.
    Type: Application
    Filed: May 13, 2019
    Publication date: July 1, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Ting LI, Zhengbo HUANG, Yong ZHANG, Yabo NI, Jian'an WANG, Dongbing FU
  • Publication number: 20210203277
    Abstract: A highly linear time amplifier with power supply rejection. In a reset stage, the threshold value of an over-threshold detector is used for resetting an output node of an amplifier, to eliminate the impact of power supply voltage changes on the threshold value of the threshold detector. A node capacitor unit is charged under the control of an input clock signal. After completion of charging, the node capacitor unit is discharged under the control of a synchronous clock signal. The time amplification gain only depends on the proportion of the charge and discharge current, and the charging and discharging time are completely linear in principle, which eliminates the nonlinearity of the traditional time amplifier, and reduces the negative impact of threshold change on system performance.
    Type: Application
    Filed: May 13, 2019
    Publication date: July 1, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Ting LI, Zhengbo HUANG, Yong ZHANG, Yabo NI, Jian'an WANG, Dongbing FU
  • Publication number: 20210184689
    Abstract: The present disclosure provides a circuit for generating a multi-phase clock having random disturbance added thereto. The circuit for generating a clock includes a main clock module, a random signal generation module and a buffer matrix switch module. The main clock module generates N multi-phase clock signals; and the buffer matrix switch module randomly switches, under the control of a random control signal output by the random signal generation module, transmission paths of the input N multi-phase clock signals, and outputs N multi-phase clock signals with random disturbance. In the present disclosure, the clock phase error is whitened by adding random disturbance. Only with a small loss of signal-to-noise ratio, the influence of a multi-phase clock phase error on the performance of a high-precision TI ADC can be eliminated in real time, and the influence of the fluctuation of a clock phase error can be tracked and eliminated.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 17, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Jie PU, Gangyi HU, Dongbing FU, Zhengping ZHANG, Liang LI, Ting LI, Daiguo XU, Mingyuan XU, Xiaofeng SHEN, Xianjie WAN, Youhua WANG
  • Publication number: 20210135641
    Abstract: The present disclosure provides a clock driver circuit, including: an input stage, a double-ended to single-ended conversion stage and a driver output stage connected in sequence. The input stage includes two mutually loaded differential amplifiers and a common mode negative feedback loop. The differential amplifiers are connected to a differential clock signal for amplification to generate a common mode voltage. The common mode feedback circuit is connected to an output end of the differential amplifiers to stabilize the output amplitude of the common mode voltage. The double-ended to single-ended conversion stage converts a differential sine clock signal output by the double-ended common mode voltage into a single-ended square wave clock signal. The driver output stage includes a multi-stage cascaded push-pull phase inverter to improve the drive capability of the square wave clock signal.
    Type: Application
    Filed: July 25, 2018
    Publication date: May 6, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Xiaofeng SHEN, Xingfa HUANG, Liang LI, Xi CHEN, Mingyuan XU, Jian'an WANG, Dongbing FU, Guangbing CHEN
  • Patent number: 10951220
    Abstract: The present disclosure relates to the field of semiconductor integrated circuits, and to a method for calibrating a capacitor voltage coefficient of a high-precision successive approximation analog-to-digital converter (SAR ADC). The method includes: calibrating a voltage coefficient; obtaining a sampled charged charge according to a capacitance model with the voltage coefficient; according to an INL value obtained by testing, first verifying whether a maximum value of INL occurs in the place shown in Equation 3, then obtaining two very close second-order capacitor voltage coefficients according to Equation 4, and taking an average value thereof as a second-order capacitor voltage coefficient; and then calibrating the second-order capacitor voltage coefficient in a digital domain.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: March 16, 2021
    Assignee: NO. 24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Yong Zhang, Ting Li, Zhengbo Huang, Yabo Ni, Dongbing Fu
  • Patent number: 10944390
    Abstract: The present disclosure provides a high-speed and low-noise dynamic comparator, which includes: an input unit, including an input NMOS transistor and an input PMOS transistor; a latch unit, including a latching NMOS transistor and a latching PMOS transistor, where the latching NMOS transistor and the latching PMOS transistor are connected to form a latch structure; a pull-up unit, including a pull-up PMOS transistor connected to the input NMOS transistor; and a substrate bootstrap voltage generation circuit, generating a substrate bootstrap voltage.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: March 9, 2021
    Assignee: NO. 24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Daiguo Xu, Gangyi Hu, Ruzhang Li, Jian'an Wang, Guangbing Chen, Dongbing Fu, Shiliu Xu, Tao Liu, Jie Pu, Zhihua Feng
  • Publication number: 20210013896
    Abstract: The present disclosure relates to the field of semiconductor integrated circuits, and to a method for calibrating a capacitor voltage coefficient of a high-precision successive approximation analog-to-digital converter (SAR ADC). The method includes: calibrating a voltage coefficient; obtaining a sampled charged charge according to a capacitance model with the voltage coefficient; according to an INL value obtained by testing, first verifying whether a maximum value of INL occurs in the place shown in Equation 3, then obtaining two very close second-order capacitor voltage coefficients according to Equation 4, and taking an average value thereof as a second-order capacitor voltage coefficient; and then calibrating the second-order capacitor voltage coefficient in a digital domain.
    Type: Application
    Filed: July 18, 2018
    Publication date: January 14, 2021
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Yong ZHANG, Ting LI, Zhengbo HUANG, Yabo NI, Dongbing FU
  • Publication number: 20200412353
    Abstract: The present disclosure provides a high-speed and low-noise dynamic comparator, which includes: an input unit, including an input NMOS transistor and an input PMOS transistor; a latch unit, including a latching NMOS transistor and a latching PMOS transistor, where the latching NMOS transistor and the latching PMOS transistor are connected to form a latch structure; a pull-up unit, including a pull-up PMOS transistor connected to the input NMOS transistor; and a substrate bootstrap voltage generation circuit, generating a substrate bootstrap voltage.
    Type: Application
    Filed: July 18, 2018
    Publication date: December 31, 2020
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATIO
    Inventors: Daiguo XU, Gangyi HU, Ruzhang LI, Jian'an WANG, Guangbing CHEN, Dongbing FU, Shiliu XU, Tao LIU, Jie PU, Zhihua FENG
  • Patent number: 10778092
    Abstract: The present disclosure provides a negative voltage generating circuit having an automatic voltage adjustment function, including a negative voltage generating circuit and a feedback control module. The negative voltage generated by the negative voltage generating circuit is adjusted by the feedback control module. The negative voltage generating circuit having the automatic voltage adjustment function of the present disclosure can automatically adjust the charge current of the charge pump according to the load current, thereby realizing the stability of the output voltage, such that the traditional analog circuit structure can work normally under the extremely low power supply voltage, and is particularly suitable for the deep submicron process. The present disclosure also realizes the digital adjustment of the output voltage, the negative voltage output is no longer single, and can be adjusted according to actual needs.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: September 15, 2020
    Assignee: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Rongbin Hu, Yonglu Wang, Zhengping Zhang, Jian'an Wang, Guangbing Chen, Dongbing Fu, Yuxin Wang, Hequan Jiang, Gangyi Hu
  • Patent number: 10735018
    Abstract: Disclosed is a successive approximation algorithm-based ADC self-correcting circuit, comprising: a coding circuit, a voltage dividing resistor string, a comparator array, a multi-path selection switch, a first digital-to-analog converter, a reference circuit, a control register, and a data register; an input end of the coding circuit is connected to an output end of the comparator array; a positive-phase input end of each comparator in the comparator array is connected to a mobile end of the multi-path selection switch; a negative-phase input end of each comparator in the comparator array is correspondingly connected between each two neighboring resistors in the voltage dividing resistor string; an enabling end of the comparator array is connected to the control register; a first immobile end of the multi-path selection switch is used for receiving an analog signal, a second immobile send is connected to an output end of the first digital-to-analog converter, and a control end is connected to the control regi
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: August 4, 2020
    Assignee: CHINA ELECTRONIC TECHNOLOGY CORPORATION, 24TH RESEARCH INSTITUTE
    Inventors: Rongbin Hu, Yonglu Wang, Zhengping Zhang, Jian'an Wang, Guangbing Chen, Dongbing Fu, Yuxin Wang, Hequan Jiang, Gangyi Hu
  • Publication number: 20200195270
    Abstract: Disclosed is a successive approximation algorithm-based ADC self-correcting circuit, comprising: a coding circuit, a voltage dividing resistor string, a comparator array, a multi-path selection switch, a first digital-to-analog converter, a reference circuit, a control register, and a data register; an input end of the coding circuit is connected to an output end of the comparator array; a positive-phase input end of each comparator in the comparator array is connected to a mobile end of the multi-path selection switch; a negative-phase input end of each comparator in the comparator array is correspondingly connected between each two neighboring resistors in the voltage dividing resistor string; an enabling end of the comparator array is connected to the control register; a first immobile end of the multi-path selection switch is used for receiving an analog signal, a second immobile send is connected to an output end of the first digital-to-analog converter, and a control end is connected to the control regi
    Type: Application
    Filed: June 21, 2017
    Publication date: June 18, 2020
    Inventors: RONGBIN HU, YONGLU WANG, ZHENGPING ZHANG, JIAN'AN WANG, GUANGBING CHEN, DONGBING FU, YUXIN WANG, HEQUAN JIANG, GANGYI HU
  • Publication number: 20200127559
    Abstract: The present disclosure provides a negative voltage generating circuit having an automatic voltage adjustment function, including a negative voltage generating circuit and a feedback control module. The negative voltage generated by the negative voltage generating circuit is adjusted by the feedback control module. The negative voltage generating circuit having the automatic voltage adjustment function of the present disclosure can automatically adjust the charge current of the charge pump according to the load current, thereby realizing the stability of the output voltage, such that the traditional analog circuit structure can work normally under the extremely low power supply voltage, and is particularly suitable for the deep submicron process. The present disclosure also realizes the digital adjustment of the output voltage, the negative voltage output is no longer single, and can be adjusted according to actual needs.
    Type: Application
    Filed: September 11, 2017
    Publication date: April 23, 2020
    Applicant: NO.24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Rongbin HU, Yonglu WANG, Zhengping ZHANG, Jian'an WANG, Guangbing CHEN, Dongbing FU, Yuxin WANG, Hequan JIANG, Gangyi HU
  • Patent number: 10425065
    Abstract: A high-speed low-power-consumption trigger, which comprises a control signal generation circuit, an enabling unit, and a latch structure. The latch structure comprises two input ends, two output ends, two enabling ends, a second enabling end, and a ground end. The enabling unit comprises two enabling circuits. An output signal X of the control signal generation circuit and an external control signal D serve as input signals of the first enabling circuit. An output end of the first enabling circuit is connected to the first enabling end. The output signal X of the control signal generation circuit and a phase-inverted signal DB of the external control signal D serve as input signals of the second enabling circuit. An output end of the second enabling circuit is connected to the second enabling end.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: September 24, 2019
    Assignee: NO. 24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
    Inventors: Daiguo Xu, Gangyi Hu, Ruzhang Li, Jianan Wang, Guangbing Chen, Yuxin Wang, Dongbing Fu, Tao Liu, Lu Liu, Minming Deng, Hanfu Shi, Xu Wang