公开(公告)号：US20240213938A1

公开(公告)日：2024-06-27

申请号：US18538091

申请日：2023-12-13

申请人： IMEC VZW

发明人： Shun NAGATA ,  Ewout MARTENS ,  Jan CRANINCKX

IPC分类号： H03F3/45

CPC分类号： H03F3/45179 ,  H03F2203/45154

摘要： A self-biased amplifier circuit, comprises: an input, wherein the input comprises input transistors forming inverters; bias transistors, wherein a source of each input transistor is connected to a drain of a bias transistor for providing a bias current to the inverters; an output connected to a first output node and/or a second output node; and pairs of transistor switches connected between the first or the second output node and a respective gate of the bias transistors, wherein the pairs of transistor switches are configured to control the self-biased amplifier circuit to assume an active mode or a standby mode.

公开(公告)号：US11936354B2

公开(公告)日：2024-03-19

申请号：US17740388

申请日：2022-05-10

申请人： REALTEK SEMICONDUCTOR CORPORATION

发明人： Shih-Hsiung Huang

IPC分类号： H03F3/45 ,  H03F1/02

CPC分类号： H03F3/45269 ,  H03F1/0216 ,  H03F2203/45154

摘要： An amplifier circuit is provided. The amplifier circuit outputs a pair of differential output signals through a first output terminal and a second output terminal. The amplifier circuit includes a first amplifier stage electrically connected to a first node and a second node for amplifying a pair of differential input signals; a second amplifier stage which is electrically connected to the first node and the second node and coupled to the first output terminal and the second output terminal; a first switch, coupled between the first output terminal and a first reference voltage; a second switch, coupled between the second output terminal and the first reference voltage; a third switch, coupled between the first node and the first reference voltage; a fourth switch coupled between the second node and the first reference voltage; and a fifth switch coupled between a second reference voltage and the first amplifier stage.

公开(公告)号：US20180226925A1

公开(公告)日：2018-08-09

申请号：US15943938

申请日：2018-04-03

申请人： SKYWORKS SOLUTIONS, INC.

发明人： Aleksey A. Lyalin

IPC分类号： H03F3/21 ,  H03F1/30 ,  H03F3/191 ,  H03F3/50 ,  H03F3/72

CPC分类号： H03F3/211 ,  H03F1/302 ,  H03F3/191 ,  H03F3/50 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/451 ,  H03F2203/21127 ,  H03F2203/21145 ,  H03F2203/21175 ,  H03F2203/45154 ,  H03F2203/7209 ,  H03F2203/7236

摘要： A bias circuit for power amplifiers is disclosed. A power amplifier bias circuit can include an emitter follower device and an emitter follower mirror device coupled to form a mirror configuration. The emitter follower device can be configured to provide a bias signal for a power amplifier at an output port. The power amplifier bias circuit can include a reference device configured to mirror an amplifying transistor of an amplifying device of the power amplifier. The emitter follower mirror device can be configured to provide a mirror bias signal to the reference device. A node between the emitter follower device and the emitter follower mirror device can have a voltage of approximately twice a base-emitter voltage (2 Vbe) of the amplifying transistor.

公开(公告)号：US20180181180A1

公开(公告)日：2018-06-28

申请号：US15392117

申请日：2016-12-28

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Charles PARKHURST

IPC分类号： G06F1/30 ,  H03F3/45 ,  G06F1/32

CPC分类号： H03F3/45179 ,  H03F3/45183 ,  H03F3/45273 ,  H03F2203/45154 ,  H03F2203/45248

摘要： An amplifier includes a dynamic bias circuit and an amplification circuit coupled to the dynamic bias circuit. The dynamic bias circuit includes a plurality of transistors coupled to a plurality of resistors. The dynamic bias circuit is configured to generate a bias current with a magnitude that increases in response to the dynamic bias circuit receiving a falling edge of an input signal and decreases in response to the dynamic bias circuit receiving a rising edge of the input signal. The amplification circuit is configured to receive the bias current and amplify the input signal based on the bias current to generate an output signal that has a higher slew rate for a falling signal than for a rising signal.

公开(公告)号：US20180159487A1

公开(公告)日：2018-06-07

申请号：US15792692

申请日：2017-10-24

申请人： SKYWORKS SOLUTIONS, INC.

发明人： Anatoli PUKHOVSKI

IPC分类号： H03F3/21 ,  H03F1/02 ,  H03F3/45 ,  H03F3/19

CPC分类号： H03F3/211 ,  H03F1/0261 ,  H03F3/19 ,  H03F3/45475 ,  H03F2200/18 ,  H03F2200/451 ,  H03F2203/21145 ,  H03F2203/45154

摘要： Circuits and methods related to power amplifiers. In some implementations, a bias circuit includes a reference device connectable to receive a first electrical supply level, the reference device arranged to produce an electrical bias condition using the first electrical supply level, and the reference device connectable to provide the electrical bias condition to an amplifier device connectable to a second electrical supply level. The bias circuit also includes a differential amplifier connectable to receive the first electrical supply level, the differential amplifier having a first input connectable to a first node of the reference device and a second input connectable to receive a reference electrical level, the differential amplifier arranged to maintain a first electrical level on the first node of the reference device as a function of the reference electrical level.

公开(公告)号：US09755602B2

公开(公告)日：2017-09-05

申请号：US14258634

申请日：2014-04-22

申请人： Analog Devices Technology ,  Analog Devices, Inc.

发明人： Eberhard Brunner ,  Jeff Venuti

IPC分类号： H04B1/04 ,  H03G3/30 ,  H03F3/19 ,  H03F3/45 ,  H03G1/00 ,  H03C1/62

CPC分类号： H03G3/3042 ,  H03F3/19 ,  H03F3/4508 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2203/45116 ,  H03F2203/45154 ,  H03F2203/45306 ,  H03G1/0023

摘要： A system has a baseband gain stage to receive incoming in-phase and quadrature voltage signals and output in-phase and quadrature current signals, a mixer core arranged to receive the in-phase and quadrature current signals and output radio frequency signals, and a variable gain amplifier to receive the radio frequency signals and produce a broadband radio signal.

公开(公告)号：US09755594B1

公开(公告)日：2017-09-05

申请号：US15201974

申请日：2016-07-05

申请人： Shenzhen South Silicon Valley Microelectronics Co., Limited

发明人： Pei-Si Wu ,  Hua-Yu Liao

IPC分类号： H03F3/04 ,  H03F3/45 ,  H03F1/56 ,  H03F3/195

CPC分类号： H03F3/45179 ,  H03F1/0211 ,  H03F1/56 ,  H03F1/565 ,  H03F3/195 ,  H03F3/245 ,  H03F3/45188 ,  H03F3/45475 ,  H03F2200/451 ,  H03F2200/507 ,  H03F2200/511 ,  H03F2203/45154 ,  H03F2203/45731

摘要： A power amplifying circuit includes a switching circuit, an amplifier and a load. The switching circuit receives a first supply voltage and a second supply voltage. When the switching circuit is in a first operation mode, the first supply voltage is provided to a node. When the switching circuit is in a second operation mode, the second supply voltage is provided to the node. The amplifier receives a first input signal and a second input signal, and outputs a first output signal and a second output signal from a first output terminal and a second output signal, respectively. The load includes a first inductor and a second inductor. The first inductor is connected between the node and the first output terminal. The second inductor is connected between the node and the second output terminal.

公开(公告)号：US20160315593A1

公开(公告)日：2016-10-27

申请号：US15202193

申请日：2016-07-05

申请人： National Chiao Tung University

发明人： Yu-Jiu Wang ,  Ching-Yun CHU

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  G05F3/242 ,  H03F1/0205 ,  H03F1/0261 ,  H03F1/301 ,  H03F3/16 ,  H03F2200/24 ,  H03F2200/555 ,  H03F2203/45136 ,  H03F2203/45154 ,  H03F2203/45288 ,  H03F2203/45528

摘要： A bias circuit is adapted for biasing a to-be-biased transconductance cell such that the to-be-biased transconductance cell has a constant transconductance, and includes a converter and a controller. The converter receives first and second current signals, and generates, based on the first and second current signals, a first voltage signal, a second voltage signal and a bias voltage that is for biasing the to-be-biased transconductance cell. The controller receives the first and second voltage signals from the converter, generates the first and second current signals for the converter based on the first and second voltage signals so as to make a magnitude of the first voltage signal equal a magnitude of the second voltage signal.

公开(公告)号：US09331644B2

公开(公告)日：2016-05-03

申请号：US14599701

申请日：2015-01-19

申请人： STMICROELECTRONICS (SHENZHEN) R&D CO. LTD

发明人： Mei Yang ,  YueHua Wang ,  Xaut Zhang ,  Kelvin Wen ,  XiangSheng Li

IPC分类号： H03K5/22 ,  H03F3/21 ,  H03F3/26 ,  H03F3/187 ,  H03F3/45 ,  H03F3/68

CPC分类号： H03F3/211 ,  H03F3/187 ,  H03F3/26 ,  H03F3/4508 ,  H03F3/45475 ,  H03F3/68 ,  H03F2200/03 ,  H03F2203/21131 ,  H03F2203/45102 ,  H03F2203/45154 ,  H03F2203/45244 ,  H03F2203/45528 ,  H03F2203/45552

摘要： A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.

摘要翻译： 用于AB类放大器的钳位电路包括参考电压电路，具有耦合到参考电压电路的输入的四个NPN达林顿晶体管和用于提供四个钳位电压的输出和具有耦合到参考电压电路的输入的分立NPN达林顿晶体管， 和四个单独的输出，用于提供四个交流接地电压。

公开(公告)号：US20160065149A1

公开(公告)日：2016-03-03

申请号：US14888431

申请日：2014-05-02

申请人： COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION

发明人： Robert Douglas Shaw

IPC分类号： H03F1/56 ,  H03F3/45

CPC分类号： H03F1/565 ,  H03F3/45076 ,  H03F3/45179 ,  H03F2200/108 ,  H03F2200/241 ,  H03F2200/243 ,  H03F2200/294 ,  H03F2200/411 ,  H03F2203/45154 ,  H03F2203/45394

摘要： A low noise amplifier circuit including: at least a first input and first output; at least a first stage of transistor amplification having a transistor input terminal; the circuit further comprising: an input driving circuit interconnecting the first input to the transistor input terminal, the input driving circuit including a parallel resonant circuit interconnected between the transistor input terminal and ground and a series resonant circuit interconnected between the input terminal and the transistor input terminal, the input driving circuit functioning as an input matching network for the circuit in conjunction with an input bias and decoupling network.

摘要翻译： 一种低噪声放大器电路，包括：至少第一输入和第一输出; 晶体管放大的至少第一级具有晶体管输入端; 所述电路还包括：输入驱动电路，将所述第一输入端与所述晶体管输入端相连，所述输入驱动电路包括在所述晶体管输入端和地之间互连的并联谐振电路和在所述输入端与所述晶体管输入端之间互连的串联谐振电路 输入驱动电路与输入偏置和去耦网络一起用作电路的输入匹配网络。