公开(公告)号：US20230122410A1

公开(公告)日：2023-04-20

申请号：US17683572

申请日：2022-03-01

Applicant: University of Electronic Science and Technology of China

Inventor： Hua FAN ,  Yilin LIU ,  Huichao YUE ,  Kai XU ,  Quanyuan FENG ,  Huaying SU ,  Guosong WANG

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/08

Abstract: A DC-DC converter circuit with selectable working modes is disclosed. Compared with the traditional chip that works in one mode, the DC-DC converter with selectable working modes adds only a mode selection circuit, so that the chip can work in voltage control mode or current control mode. On the one hand, the applications of the chip are more extensive, and on the other hand, when the applications are different, the cost of developing a DC-DC converter with selectable working mode is greatly reduced compared with the traditional DC-DC converter.

公开(公告)号：US20190131998A1

公开(公告)日：2019-05-02

申请号：US16114300

申请日：2018-08-28

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Hua FAN ,  Jingxuan YANG ,  Quanyuan FENG ,  Dagang LI ,  Daqian HU ,  Yuanjun CEN ,  Hadi HEIDARI ,  Franco MALOBERTI ,  Jingtao LI ,  Huaying SU

IPC: H03M1/46

Abstract: A method of arranging a capacitor array of a successive approximation register analog-to-digital converter in a successive approximation process, the method including: splitting a binary capacitor array into unit capacitors, then sorting, grouping, and rotating the original binary capacitive array involved in successive approximation conversion.

公开(公告)号：US20240410961A1

公开(公告)日：2024-12-12

申请号：US18527347

申请日：2023-12-03

Applicant: University of Electronic Science and Technology of China

Inventor： Hua FAN ,  Huichao YUE ,  Yiming HU ,  Guo LI ,  Jing LUO ,  Panfeng ZHAO ,  Quanyuan FENG

IPC: G01R33/02 ,  G01R33/07

Abstract: Disclosed is a three-axis Hall angle sensor with an accuracy of 0.3°. The sensor is mainly designed by means of finite element software and COMSOL Multiphysics. The present specification will be mainly performed in three steps. In the first step, a cross-shape horizontal Hall element for measuring the magnetic field in the vertical direction, that is, the direction z, is studied. The second section mainly studies a three-contact four-Hall vertical element for measuring the magnetic field in the directions x, y. The third part is to design the angle sensor. Compared with the horizontal Hall element, the vertical Hall element has a relatively large offset, therefore, four vertical Hall elements are used to measure the magnetic field in the horizontal direction, and two complementary vertical structures are used to eliminate the error when the magnetic field in the same horizontal direction is measured.

公开(公告)号：US20210058091A1

公开(公告)日：2021-02-25

申请号：US16703828

申请日：2019-12-04

Applicant: University of Electronic Science and Technology of China

Inventor： Hua FAN ,  Chen WANG ,  Peng LEI ,  Dainan ZHANG ,  Quanyuan FENG ,  Lang FENG ,  Xiaopeng DIAO ,  Dagang LI ,  Kelin ZHANG ,  Daqian HU ,  Yuanjun CEN

IPC: H03M1/10 ,  H03M1/46

Abstract: A method of calibrating capacitive array of a resistor-capacitor hybrid successive approximation register analog-to-digital converter (RC-hybrid SAR ADC) that includes a high M-bit capacitor DAC and a low N-bit resistor DAC. The method includes: disposing n unit capacitors in each capacitive array of the RC-hybrid SAR ADC, wherein n=2M−1; sorting the capacitors in an ascending order according to their capacitances to form a sorted array, and selecting two capacitors Cu(n/2)*, Cu(n/2+1)* in the middle positions as a least significant bit (LSB) capacitor and a dummy capacitor, respectively; 4) obtaining a new array by forming each capacitor through adding two capacitors which have symmetrical positions with respect to the middle position(s) in the sorted array; and sorting the new array in an ascending order, and selecting the capacitor in the middle position as a higher bit capacitor. The method improves the static and dynamic performance of the SAR. ADC