公开(公告)号：US12132452B2

公开(公告)日：2024-10-29

申请号：US16946090

申请日：2020-06-05

申请人： Analog Devices, Inc.

发明人： Arthur J. Kalb ,  Yoshinori Kusuda

IPC分类号： H03F1/52 ,  H02H3/20 ,  H02M1/32

CPC分类号： H03F1/52 ,  H02H3/20 ,  H02M1/32 ,  H03F2200/441

摘要： Apparatus and methods for amplifier input-overvoltage protection with low leakage current are provided herein. In certain embodiments, amplifier input circuitry for an amplifier includes a pair of input terminals, a pair of input transistors each having a control input (for instance, a transistor gate), a pair of protection transistors each connected between one of the input terminals and the control input of a corresponding one of the input transistors, and a bidirectional clamp connected between the control inputs of the input transistors. Implementing the amplifier input circuitry in this manner provides a number of advantages including, but not limited to, robust protection against input overvoltage and low input-leakage current.

公开(公告)号：US20240347529A1

公开(公告)日：2024-10-17

申请号：US18574986

申请日：2022-02-15

申请人： SONY SEMICONDUCTOR SOLUTIONS CORPORATION

发明人： TOMOYA NISHIDA ,  YOSHIKAZU MOTOYAMA ,  HIDEAKI FUTAI

IPC分类号： H01L27/02 ,  H01L27/088 ,  H01L29/778 ,  H03F1/52 ,  H03F3/195 ,  H03F3/24

CPC分类号： H01L27/0266 ,  H01L27/0883 ,  H01L29/7786 ,  H03F1/523 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/451

摘要： A protection circuit includes a first insulated gate field-effect transistor in which: a first main electrode is coupled between an external terminal and an internal circuit; a second main electrode and a gate electrode are coupled to a reference power supply; and an electric charge accumulation section configured to accumulate hot carriers is provided in a gate insulating film.

公开(公告)号：US20240291442A1

公开(公告)日：2024-08-29

申请号：US18655725

申请日：2024-05-06

申请人： Murata Manufacturing Co., Ltd.

发明人： Shingo YANAGIHARA

IPC分类号： H03F1/52 ,  H03F1/56 ,  H03F3/21

CPC分类号： H03F1/52 ,  H03F1/565 ,  H03F3/21 ,  H03F2200/387 ,  H03F2200/426

摘要： A limiter circuit includes: one or a plurality of first diodes having an anode electrically connected to a signal line through which a high-frequency signal passes, and a cathode electrically connected to a node, the plurality of first diodes being connected in series; a transistor having a source-drain path or an emitter-collector path electrically connected between a reference potential and the node, and a gate or a base to which a control voltage or a control current is input; and a first constant current source that outputs a first constant current to the node.

公开(公告)号：US20240250652A1

公开(公告)日：2024-07-25

申请号：US18564280

申请日：2022-08-02

申请人： SHANGHAI MEICON INTELLIGENT CONSTRUCTION CO., LTD. ,  GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD.

发明人： Zhen ZHAO ,  Dayou YANG ,  Jie YAN

IPC分类号： H03F3/45 ,  H03F1/52

CPC分类号： H03F3/45475 ,  H03F1/52 ,  H03F2200/261 ,  H03F2203/45138

摘要： An output control circuit, a controller, and an air conditioner are provided. The output control circuit includes a signal input end, a first amplification module, a first power module, a first resistor, a second amplification module, a switch module, and a signal output end. A first input end of the first amplification module is connected to the signal input end. A first input end of the first power module is connected to an output end of the first amplification module and a second input end is connected to a first direct-current voltage source. A first end of the first resistor is connected to an output end of the first power module. A first input end of the second amplification module is connected to the first end of the first resistor and a second input end is connected to a second end of the first resistor.

公开(公告)号：US20240213930A1

公开(公告)日：2024-06-27

申请号：US18216574

申请日：2023-06-29

申请人： Samsung Electro-Mechanics Co., Ltd.

发明人： Youngwong JANG ,  Jeonghoon KIM ,  Shinichi IIZUKA ,  Jongok HA ,  Hyejin LEE

IPC分类号： H03F1/52 ,  H02H7/00 ,  H03F3/21

CPC分类号： H03F1/523 ,  H02H7/008 ,  H03F3/21 ,  H03F2200/451 ,  H03F2203/21127

摘要： An overcurrent protection circuit includes a variable voltage source configured to generate a first voltage which that in response to a variable current; an amplifier comprising a first input terminal to which the first voltage is applied; and a limit current source connected to a second input terminal of the amplifier and configured to generate a limit current corresponding to the first voltage.

公开(公告)号：US20240204734A1

公开(公告)日：2024-06-20

申请号：US18476962

申请日：2023-09-28

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Rupesh KHARE ,  Mehul MISTRY ,  Gautham SATHYANARAYANAN

IPC分类号： H03F1/52

CPC分类号： H03F1/523 ,  H03F3/45071 ,  H03F2200/441

摘要： Circuitry for driving first and second loads, the circuitry comprising: a first output signal path for supplying a first driving signal to the first load; a second output signal path for supplying a second driving signal to the second load; sequencer circuitry configured to initiate a first state change in the first output signal path and a second state change in the second output signal path, wherein the sequencer circuitry is configured to control the initiation of the first and second state changes such that the second state change is not synchronised with the first state change.

公开(公告)号：US11929717B2

公开(公告)日：2024-03-12

申请号：US17582338

申请日：2022-01-24

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Mahadevan Shankara Venkiteswaran ,  Arun Singh ,  Jofin Vadakkeparasseril Joseph

IPC分类号： H03F1/52 ,  H03F1/30 ,  H03F3/00 ,  H03F3/45

CPC分类号： H03F1/303 ,  H03F1/52 ,  H03F3/005 ,  H03F3/45632

摘要： An output stage of an operational amplifier includes a low voltage (LV) metal oxide semiconductor (MOS) device and a dynamic current limit circuit. An output current of the operational amplifier flows through the LV MOS device. The dynamic current limit circuit is configured to sense a drain voltage of the LV MOS device and increase a clamping voltage for the LV MOS device when the drain voltage of the LV MOS device is less than a threshold voltage.

公开(公告)号：US20240072736A1

公开(公告)日：2024-02-29

申请号：US18073506

申请日：2022-12-01

申请人： ACER INCORPORATED

发明人： Po-Jen Tu ,  Jia-Ren Chang ,  Kai-Meng Tzeng ,  Ming-Chun Yu

IPC分类号： H03F1/52 ,  H03F3/68

CPC分类号： H03F1/52 ,  H03F3/68 ,  H03F2200/03

摘要： An amplifier DC bias protection circuit includes an amplifier module, a filter module and a comparator module. The amplifier module converts an input signal into a non-inverting signal and an inverting signal. The filter module blocks AC signals in the non-inverting signal and the inverting signal, thereby providing a first DC bias signal and a second DC bias signal accordingly. The comparator module is configured to determine whether the absolute value of a DC bias difference signal is greater than a predetermined value, and output a determination signal for deactivating the amplifier module when the absolute value of the DC bias difference signal is greater than the predetermined value. The DC bias difference signal is associated with the voltage difference between the first DC bias signal and the second DC bias signal.

公开(公告)号：US11888452B2

公开(公告)日：2024-01-30

申请号：US17228983

申请日：2021-04-13

申请人： SKYWORKS SOLUTIONS, INC.

发明人： Paul Raymond Andrys

IPC分类号： H03G3/20 ,  H03F1/52 ,  H03F1/02 ,  H03F1/22 ,  H03F3/195 ,  H03F3/24 ,  H03F3/72

CPC分类号： H03F1/523 ,  H03F1/0222 ,  H03F1/223 ,  H03F3/195 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/435 ,  H03F2200/451

摘要： Amplifier having input power protection. In some embodiments, an amplifier circuit can include an input node and an output node, and an amplifier implemented between the input node and the output node. The amplifier circuit can further include a bias circuit configured to provide a bias signal to the amplifier. The amplifier circuit can further include a protection circuit configured to generate a detected voltage representative of a peak of a radio-frequency signal present at the input node. The protection circuit can be further configured to enable a protection mode when the detected voltage is greater than a first threshold value and to disable the protection mode when the detected voltage is less than a second threshold value that is less than the first threshold value.

公开(公告)号：US11876496B2

公开(公告)日：2024-01-16

申请号：US17386979

申请日：2021-07-28

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Vadim Valerievich Ivanov ,  Srinivas Kumar Pulijala

IPC分类号： H03F3/45 ,  H03F1/52

CPC分类号： H03F3/45179 ,  H03F1/52 ,  H03F2200/426

摘要： Differential input circuits employ protection transistors and feedback paths to limit the differential voltage applied to input transistors. In an example arrangement, a differential input voltage is applied to terminals of the protection transistors, and current paths couple the respective protection transistors to control terminals of the input transistors, respectively. A control terminal drive voltage source is coupled to the control terminals of the input protection transistors to control the drive voltage applied to those terminals. Feedback paths, one for each of the input transistors, control voltages applied to the control terminals of the input transistors, maintaining the input differential voltage at a relatively low level and defined by the product of a specified current value and a specified resistance value.