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1. 发明公开

US20230231525A1 Variable gain amplifier circuit and method having linearity compensation mechanism 审中-公开
公开(公告)号：US20230231525A1
公开(公告)日：2023-07-20
申请号：US18087261
申请日：2022-12-22
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： YANG CHANG , CHIA-JUN CHANG
IPC分类号： H03G1/00
CPC分类号： H03G1/007
摘要： The present invention discloses a variable gain amplifier circuit having linearity compensation mechanism is provided. A lower amplification transistor of a lower branch of an amplification circuit is controlled by an AC input signal. Upper amplification transistors of an upper branch generate an AC output signal at an amplification output terminal. An amplification control circuit controls the turn-on and turn-off of the upper amplification transistor according to an amplification control voltage. An inductor is electrically coupled between a power supply terminal and the amplification output terminal. In a gain adjustment circuit, each of adjustment control circuits controls the turn-on and turn-off of each of adjustment transistors according to a adjustment control voltage. A first voltage adjustment circuit adjusts an impedance of each of the adjustment transistors to further adjust an AC cross voltage relation between the lower amplification transistor and the upper amplification transistors.

2. 发明申请

US20180287577A1 OPEN-LOOP LINEAR VGA 审中-公开
公开(公告)号：US20180287577A1
公开(公告)日：2018-10-04
申请号：US15995008
申请日：2018-05-31
申请人： INPHI CORPORATION
发明人： James GORECKI
IPC分类号： H03G1/00 , H03G3/00 , H03F1/56 , H03F1/02
CPC分类号： H03G1/007 , H03F1/0205 , H03F1/56 , H03F3/45197 , H03F2203/45492 , H03G3/001
摘要： The present invention is directed to electrical circuits. More specifically, embodiments of the present invention provide a variable gain amplifier (VGA) device that includes a low-gain tuning section and a high-gain tuning section. The low-gain tuning section includes both resistor and transistor elements. The high-gain tuning section includes a transistor element and is activated when an output gain is greater than a predetermined threshold level. There are other embodiments as well.

3. 发明申请

US20180191321A1 TEMPERATURE-COMPENSATED EQUALIZER 审中-公开
公开(公告)号：US20180191321A1
公开(公告)日：2018-07-05
申请号：US15394931
申请日：2016-12-30
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Amit RANE , Dongwei CHEN
IPC分类号： H03G1/00 , H03F3/45 , H03G3/30
CPC分类号： H03G1/007 , H03F1/3211 , H03F3/45071 , H03F3/45098 , H03F3/45479 , H03F2203/45488 , H03G3/3089 , H03G2201/708
摘要： An equalizer, in at least some embodiments, comprises an amplifier configured to produce an amplified voltage signal that is a function of an ambient temperature affecting the equalizer. The equalizer also includes a linear equalizer stage coupled to the amplifier and comprising a transistor having a resistance controlled by the amplified voltage signal. The linear equalizer stage is configured to produce a voltage output signal having a gain that is dependent on the transistor resistance and on a frequency of the amplified voltage signal.

4. 发明授权

US09966913B2 Linear-in-dB, low-voltage, programmable/variable gain amplifier (PGA) using recursive current division 有权
公开(公告)号：US09966913B2
公开(公告)日：2018-05-08
申请号：US15245475
申请日：2016-08-24
申请人： Hong Kong Applied Science and Technology Research Institute Company, Limited
发明人： Chi Hong Chan , Bun Go Yau , Gordon Chung
IPC分类号： H03F1/36 , H03G1/00 , H03F3/45
CPC分类号： H03G1/007 , H03F1/0266 , H03F3/45273 , H03F3/45381 , H03F3/45475 , H03F2200/411 , H03F2203/45151 , H03F2203/45154 , H03F2203/45528 , H03F2203/45594 , H03F2203/45616 , H03G1/0088 , H03G3/001
摘要： A Programmable-Gain Amplifier (PGA) has programming steps that are linear when expressed in Decibels (linear-in-dB). A Recursive Current Division (RCD) resistor network generates currents that are selected by programmable switches to connect to a summing node input of an amplifier. A feedback resistor is connected across the summing node and the amplifier output. The resistor network has only three resistance values regardless of the number of currents selectable as programming steps. The value of a third resistor is set equal to the equivalent resistance of a second resistor in parallel with a series connection of a first resistor and the third resistors. Each final cell in the resistor network is equivalent to the third resistor, allowing recursive division of adjacent currents. The ratio of adjacent currents remains constant for all cells. Recursive Current Division (RCD) produces linear-in-dB programming steps. Floating switches are avoided since switches connect to ground.

5. 发明申请

US20180097489A1 High Linearly WiGig Baseband Amplifier with Channel Select Filter 审中-公开
公开(公告)号：US20180097489A1
公开(公告)日：2018-04-05
申请号：US15833458
申请日：2017-12-06
申请人： Tensorcom, Inc.
发明人： Zaw Soe , Kevin Jing , Steve Gao
IPC分类号： H03G1/00 , H03H11/12 , H03F3/45 , H03G5/28
CPC分类号： H03G1/007 , H03F3/45197 , H03F2200/165 , H03F2200/69 , H03F2203/45372 , H03F2203/45374 , H03F2203/45512 , H03F2203/45544 , H03F2203/45594 , H03F2203/45686 , H03F2203/45702 , H03G5/28 , H03H11/1286
摘要： A circuit comprises a Sallen-Key filter, which includes a source follower that implements a unity-gain amplifier; and a programmable-gain amplifier coupled to the Sallen-Key filter. The circuit enables programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, which decouples the bandwidth of the circuit from its gain settings. The programmable-gain amplifier can comprise a differential voltage-to-current converter, a current mirror pair, and programmable output gain stages. The Sallen-Key filter and at least one branch in the programmable-gain amplifier can comprise transistors arranged in identical circuit configurations.

6. 发明申请

US20170141746A1 High Linearly WiGig Baseband Amplifier with Channel Select Filter 有权
公开(公告)号：US20170141746A1
公开(公告)日：2017-05-18
申请号：US15352877
申请日：2016-11-16
申请人： Tensorcom, Inc.
发明人： Zaw Soe , Kevin Jing , Steve Gao
IPC分类号： H03G1/00 , H03F3/45
CPC分类号： H03G1/007 , H03F3/45197 , H03F2200/165 , H03F2200/69 , H03F2203/45372 , H03F2203/45374 , H03F2203/45512 , H03F2203/45544 , H03F2203/45594 , H03F2203/45686 , H03F2203/45702 , H03G5/28 , H03H11/1286
摘要： A circuit comprises a Sallen-Key filter, which includes a source follower that implements a unity-gain amplifier; and a programmable-gain amplifier coupled to the Sallen-Key filter. The circuit enables programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, which decouples the bandwidth of the circuit from its gain settings. The programmable-gain amplifier can comprise a differential voltage-to-current converter, a current mirror pair, and programmable output gain stages. The Sallen-Key filter and at least one branch in the programmable-gain amplifier can comprise transistors arranged in identical circuit configurations.

7. 发明授权

US09590611B2 Radiation-hardened dual gate semiconductor transistor devices containing various improved structures including MOSFET gate and JFET gate structures and related methods 有权
标题翻译：包含MOSFET栅极和JFET栅极结构的各种改进结构的辐射硬化双栅极半导体晶体管器件及相关方法
公开(公告)号：US09590611B2
公开(公告)日：2017-03-07
申请号：US14683438
申请日：2015-04-10
申请人： The United States of America as represented by the Secretary of the Navy
发明人： Patrick L. Cole , Adam R. Duncan
IPC分类号： H03K17/14 , H01L27/06 , H01L29/78 , H01L29/10 , H01L21/8234 , H03G3/30 , H01L31/08 , H03K17/567 , G01R35/00 , H01L27/098 , G01T1/02 , H01L27/085 , H01L29/423 , H01L29/66 , H03G1/00 , H01L29/808
CPC分类号： H03K17/14 , G01R35/005 , G01T1/026 , H01L21/823412 , H01L27/0617 , H01L27/085 , H01L27/098 , H01L29/1045 , H01L29/1058 , H01L29/42368 , H01L29/66484 , H01L29/78 , H01L29/7832 , H01L29/808 , H01L31/08 , H03G1/007 , H03G3/3036 , H03K17/567
摘要： Systems and methods for controlling current or mitigating electromagnetic or radiation interference effects using structures configured to cooperatively control a common semi-conductive channel region (SCR). One embodiment includes providing a metal oxide semiconductor field effect transistor (MOSFET) section formed with an exemplary SCR and two junction field effect transistor (JFET) gates on opposing sides of the MOSFET's SCR such that operation of the JFET modulates or controls current through the MOSFET's. With two JFET gate terminals to modulate various embodiments' signal(s), an improved mixer, demodulator, and gain control element in, e.g., analog circuits can be realized. Additionally, a direct current (DC)-biased terminal of one embodiment decreases cross-talk with other devices. A lens structure can also be incorporated into MOSFET structures to further adjust operation of the MOSFET. An embodiment can also include a current leakage mitigation structure configured to reduce or eliminate current leakage between MOSFET and JFET structures.
摘要翻译：使用被配置为协同控制公共半导体通道区域（SCR）的结构来控制电流或减轻电磁或辐射干扰效应的系统和方法。一个实施例包括提供在MOSFET的SCR的相对侧上形成有示例性SCR和两个结场效应晶体管（JFET）栅极的金属氧化物半导体场效应晶体管（MOSFET）部分，使得JFET的操作调制或控制通过MOSFET的电流。利用两个JFET栅极端子来调制各种实施例的信号，可以实现例如模拟电路中的改进的混频器，解调器和增益控制元件。此外，一个实施例的直流（DC）偏置的终端减少与其他设备的串扰。透镜结构也可以并入到MOSFET结构中以进一步调节MOSFET的工作。实施例还可以包括电流泄漏缓解结构，其被配置为减小或消除MOSFET和JFET结构之间的电流泄漏。

8. 发明授权

US09190973B2 Headphone amplifier 有权
标题翻译：耳机放大器
公开(公告)号：US09190973B2
公开(公告)日：2015-11-17
申请号：US13857580
申请日：2013-04-05
申请人： Marvell World Trade Ltd.
发明人： Hao Zhou , Tao Shui , Yonghua Song , Yongxu Wang , Haiqing Zhang
IPC分类号： H03G3/20 , H03F1/08 , H03F1/34 , H03F3/21 , H03F3/45
CPC分类号： H03G3/20 , H03F1/083 , H03F1/34 , H03F3/21 , H03F3/45475 , H03F2200/03 , H03F2200/153 , H03F2200/408 , H03F2200/462 , H03F2203/45051 , H03F2203/45138 , H03F2203/45166 , H03F2203/45522 , H03F2203/45526 , H03G1/007 , H03G1/0088 , H03G3/3015 , H03G3/3026
摘要： Aspects of the disclosure process an amplifier circuit. The amplifier circuit includes an input stage, an intermediate stage, an output stage and a detecting and controlling circuit. The input stage is configured to receive an electrical signal for amplification. The intermediate stage is configured to amplify with an adjustable gain. The output stage is configured to drive an audio output device in response to the amplified electrical signal. The detecting and controlling circuit is configured to detect a current for driving the audio output device, and adjust the gain of the intermediate stage based on the current to compensate for a pole change of the amplifier circuit due to a change of the current.
摘要翻译：披露过程的方面放大器电路。放大器电路包括输入级，中间级，输出级和检测和控制电路。输入级被配置为接收用于放大的电信号。中间级被配置为以可调增益放大。输出级被配置为响应于放大的电信号来驱动音频输出设备。检测和控制电路被配置为检测用于驱动音频输出装置的电流，并且基于电流来调整中间级的增益，以补偿由于电流的变化引起的放大器电路的极点变化。

9. 发明授权

US09099975B2 Current divider based voltage controlled gain amplifier 有权
标题翻译：基于分压器的电压控制增益放大器
公开(公告)号：US09099975B2
公开(公告)日：2015-08-04
申请号：US13929440
申请日：2013-06-27
申请人： Broadcom Corporation
发明人： Nir Yahav
IPC分类号： H03F3/45 , H03G3/30
CPC分类号： H03G3/30 , H03G1/007
摘要： An RF amplifier includes an input stage, a buffer stage, and an output stage. The input stage is configured to provide attenuation and impedance matching for an input radio frequency (RF) signal by providing shunt and series variable resistance current paths and RF power to RF current conversion. The input stage routes the RF current between the current paths resulting in an attenuation of the RF input current. The buffer stage is configured to provide an intermediate RF current which tracks the current level of the attenuated RF input current, thereby providing isolation between the input and output stages. The output stage is configured to provide RF current to RF power conversion, utilizing the intermediate RF current to provide an RF signal having an RF output power proportional to the RF input power.
摘要翻译： RF放大器包括输入级，缓冲级和输出级。输入级配置为通过为RF电流转换提供并联和串联可变电阻电流路径以及RF功率来为输入射频（RF）信号提供衰减和阻抗匹配。输入级在电流路径之间引导RF电流，导致RF输入电流的衰减。缓冲级被配置为提供跟踪衰减的RF输入电流的当前电平的中间RF电流，从而在输入和输出级之间提供隔离。输出级被配置为向RF功率转换提供RF电流，利用中间RF电流来提供具有与RF输入功率成比例的RF输出功率的RF信号。

10. 发明授权

US08965317B2 RF AGC control 有权
标题翻译： RF AGC控制
公开(公告)号：US08965317B2
公开(公告)日：2015-02-24
申请号：US13094485
申请日：2011-04-26
申请人： Reza Alavi , Saeed Aghtar , Christoph Steinbrecher , Arathi Sundaresan
发明人： Reza Alavi , Saeed Aghtar , Christoph Steinbrecher , Arathi Sundaresan
IPC分类号： H04B1/06 , H03F3/189 , H03F3/45 , H03G1/00 , H03G3/30
CPC分类号： H03F3/189 , H03F3/45475 , H03F3/45932 , H03F2200/294 , H03G1/0029 , H03G1/007 , H03G1/0088 , H03G3/3052
摘要： Embodiments of the present invention may provide a signal processor with a wide gain range. The signal processor may comprise at least a discrete step gain stage and a continuous variable gain amplifier (VGA) stage. The discrete step gain stage may comprise a programmable gain amplifier (PGA) (e.g., low noise amplifiers 1 and 2 (LNA1 and LNA2)). The VGA stage may provide a continuous range to compensate the LNAs gain steps. In one embodiment, the AGC controller enables an inherent hysteresis with the AGC step change if required.
摘要翻译：本发明的实施例可以提供具有宽增益范围的信号处理器。信号处理器可以包括至少离散步进增益级和连续可变增益放大器（VGA）级。离散步进增益级可以包括可编程增益放大器（PGA）（例如，低噪声放大器1和2（LNA1和LNA2））。 VGA级可以提供连续的范围来补偿LNA的增益步骤。在一个实施例中，如果需要，AGC控制器实现具有AGC步长变化的固有滞后。

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