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11. 发明授权

US11573586B2 Method and apparatus for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs) caused by limit cycle oscillation (LCO) and other factors 有权
公开(公告)号：US11573586B2
公开(公告)日：2023-02-07
申请号：US17410896
申请日：2021-08-24
申请人： University of South Florida , REGENTS OF THE UNIVERSITY OF MINNESOTA
发明人： Selçuk Köse , Longfei Wang , S. Karen Khatamifard , Ulya R. Karpuzcu
IPC分类号： G05F1/59 , G05F1/614 , G05F1/563 , G05F1/56 , G05F1/575 , G05F1/565
摘要： A DLDO has a configuration that mitigates performance degradation associated with limit cycle oscillation (LCO). The DLDO comprises a clocked comparator, an array of power transistors, a digital controller and a clock pulsewidth reduction circuit. The digital controller comprises control logic configured to generate control signals that cause the power transistors to be turned ON or OFF in accordance with a preselected activation/deactivation control scheme. The clock pulsewidth reduction circuit receives an input clock signal having a first pulsewidth and generates the DLDO clock signal having the preselected pulsewidth that is narrower that the first pulsewidth, which is then delivered to the clock terminals of the clocked comparator and the digital controller. The narrower pulsewidth of the DLDO clock reduces the LCO mode to mitigate performance degradation caused by LCO.

12. 发明授权

US11569654B2 Power control device 有权
公开(公告)号：US11569654B2
公开(公告)日：2023-01-31
申请号：US17542695
申请日：2021-12-06
申请人： Rohm Co., Ltd.
发明人： Kenichi Okajima
IPC分类号： G05F1/571 , H02H3/20 , H02H9/04 , H02H7/12 , H02H1/00 , G05F1/595 , H02M1/088 , G05F1/575 , H02M3/158 , H02M1/36 , G05F1/569 , G05F1/56 , H02M1/00
摘要： A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

13. 发明授权

US11567521B2 Linear power supply circuit 有权
公开(公告)号：US11567521B2
公开(公告)日：2023-01-31
申请号：US17529765
申请日：2021-11-18
申请人： Rohm Co., Ltd.
发明人： Takeshi Nagata , Isao Takobe , Yuhei Yamaguchi
IPC分类号： G05F1/575 , G05F1/59 , B60R16/03 , G05F3/26 , H03F3/21
摘要： A linear power supply circuit, includes: output transistor between input terminal where input voltage is applied and output terminal where output voltage is applied; a driver driving the output transistor based on difference between voltage based on the output voltage and reference voltage; and phase compensation circuit, wherein the driver includes differential amplifier outputting voltage corresponding to the difference between the voltage based on the output voltage and the reference voltage, a first capacitance having one end where output of the differential amplifier is applied and the other end where ground potential is applied, a converter converting the voltage based on the output of the differential amplifier into current, and a current amplifier amplifying the current output from the converter, and wherein the phase compensation circuit lowers gain of transfer function of the linear power supply circuit and output capacitor connected to the output terminal.

14. 发明申请

US20230027702A1 DYNAMIC ADJUSTMENT OF POWER SUPPLY RIPPLE RATIO AND FREQUENCY IN VOLTAGE REGULATORS 有权
公开(公告)号：US20230027702A1
公开(公告)日：2023-01-26
申请号：US17380591
申请日：2021-07-20
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： JUSTIN HENSPETER , LAYNE A. BERGE
IPC分类号： G06F1/30 , G06F1/3234 , G05F1/575 , G05F1/565 , G11C5/14 , H02M3/158
摘要： One or more sampling parameters of an application associated with a downstream voltage regulator may be determined. A power supply rejection ratio (“PSRR”) and a switching frequency of an upstream voltage regulator may be dynamically adjusted based on the sampling parameters of the application associated with the downstream voltage regulator. The sampling parameters may include a noise level and a workload of the selected application.

15. 发明授权

US11550350B2 Potential generating circuit, inverter, delay circuit, and logic gate circuit 有权
公开(公告)号：US11550350B2
公开(公告)日：2023-01-10
申请号：US17404149
申请日：2021-08-17
申请人： CHANGXIN MEMORY TECHNOLOGIES, INC.
发明人： Lei Zhu , Zhiyong Chen , Jinlai Luo
IPC分类号： G05F1/575 , H03K19/08 , H03K5/01 , H03K5/00
摘要： A potential generating circuit includes a first transistor and a second transistor. Potential at a substrate of the first transistor varies with a first parameter. The first parameter is any one of a supply voltage, an operating temperature, as well as a manufacturing process of the potential generating circuit. Potential at a substrate of the second transistor varies with the first parameter. A gate of the first transistor is connected to a drain of the first transistor. The substrate of the first transistor serves as a first output of the potential generating circuit. A gate of the second transistor is connected to a drain of the second transistor. The substrate of the second transistor serves as a second output of the potential generating circuit.

16. 发明授权

US11543843B2 Providing low power charge pump for integrated circuit 有权
公开(公告)号：US11543843B2
公开(公告)日：2023-01-03
申请号：US17230266
申请日：2021-04-14
申请人： Silicon Laboratories Inc.
发明人： Hua Beng Chan , Rex Tak Ying Wong , Ricky Setiawan
IPC分类号： G05F1/575 , H02M3/07
摘要： In one embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a loop circuit coupled to the amplifier, where the loop circuit is to receive the comparison signal and provide a regulated voltage to the amplifier as the feedback voltage in a first mode of operation, and in a second mode of operation to provide a predetermined feedback ratio point to the amplifier as the feedback voltage; and an output device coupled to the amplifier. The output device may be configured to receive a supply voltage and the comparison signal and output the regulated voltage at an output node based at least in part on the comparison signal.

17. 发明授权

US11526186B2 Reconfigurable series-shunt LDO 有权
公开(公告)号：US11526186B2
公开(公告)日：2022-12-13
申请号：US17065445
申请日：2020-10-07
申请人： MediaTek Inc.
发明人： Po-Jung Chang , Yan-Jiun Chen , Chih-Hong Lou
IPC分类号： G05F1/575
摘要： A low-dropout regulator (LDO) capable of providing high power-supply rejection ratio (PSRR) and good reverse isolation. The LDO may include a core circuitry and a reverse isolation circuitry. The core circuitry may include a PSRR circuitry coupled to an output node and configured to provide high PSRR at the output node. The reverse isolation circuitry may be configured to provide good reverse isolation at the output node by, for example, providing current in response to ripples at the output node. The reverse isolation circuitry may be configured with bandwidth higher than that of the core circuitry such that it can provide fast transient response. The reverse isolation circuitry may be configurable and/or reconfigurable for a desirable reverse isolation performance. The reverse isolation circuitry may be configurable and/or reconfigurable to trade off between power consumed by the reverse isolation circuitry and a leakage current flowing through the core circuitry.

18. 发明授权

US11507120B2 Load current based dropout control for continuous regulation in linear regulators 有权
公开(公告)号：US11507120B2
公开(公告)日：2022-11-22
申请号：US17016840
申请日：2020-09-10
申请人： Texas Instruments Incorporated
发明人： Avinash Shreepathi Bhat
IPC分类号： G05F1/575 , G05F1/565
摘要： In a linear regulator system, a pass element has a control terminal, an input terminal and an output terminal. The pass element is configured to provide an output voltage at the output terminal based on: an input voltage at the input terminal; and a control signal at the control terminal. A dropout error amplifier has an error output and first and second inputs. The first input is coupled to the output terminal, and the error output is coupled to the control terminal. The dropout error amplifier is configured to provide a dropout control signal at the error output based on a comparison between: the output voltage at the first input; and a dropout reference voltage at the second input. The pass element is configured to regulate the output voltage at the dropout reference voltage, responsive to the dropout control signal.

19. 发明授权

US11493945B1 Method and apparatus for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs) 有权
公开(公告)号：US11493945B1
公开(公告)日：2022-11-08
申请号：US16692389
申请日：2019-11-22
申请人： University of South Florida , REGENTS OF THE UNIVERSITY OF MINNESOTA
发明人： Longfei Wang , S. Karen Khatamifard , Ulya R. Karpuzcu , Selçuk Köse
IPC分类号： G05F1/00 , G05F1/59 , G05F1/575
摘要： An apparatus and method are provided for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs) caused by the effects of aging on the power transistors of the DLDO, such as by the effects of negative bias temperature instability (NBTI)-induced aging, for example. The apparatus comprises a shift register for use in a DLDO that is configured to activate and deactivate power transistors of the DLDO to evenly distribute electrical stress among the transistors in a way that mitigates performance degradation of the DLDO under various load current conditions. In addition, the shift register and methodology can be implemented in such a way that nearly no extra power and area overhead are consumed.

20. 发明授权

US11493943B2 Systems, devices, and methods for providing a regulated current to a varying resistive load 有权
公开(公告)号：US11493943B2
公开(公告)日：2022-11-08
申请号：US17154484
申请日：2021-01-21
申请人： Healables, Ltd.
发明人： Yehuda Cern
IPC分类号： G05F1/46 , G05F1/56 , G05F1/565 , H02M3/156 , H02M1/00 , G05F1/575
摘要： A voltage booster powered by a primary electrical source for providing an adjustable voltage across the load, while a current regulator in series with the load maintains the desired current. When the voltage drop across the current regulator exceeds an upper threshold, the voltage booster's output voltage is reduced to a lower level to reduce the power dissipated by the current regulator, to improve efficiency. When the voltage drop across the current regulator is less than a lower threshold, the voltage booster output is increased to a higher level. In burst mode operation, the voltage booster output alternates between a full voltage and zero voltage, and an optional capacitor provides voltage across the resistive load during discharge. An optional diode can ensure that the capacitor discharges through the load in cases where the voltage booster output is not floating.

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