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1. 发明授权

US09973161B2 Multistage amplifier circuit with improved settling time 有权
公开(公告)号：US09973161B2
公开(公告)日：2018-05-15
申请号：US15489187
申请日：2017-04-17
申请人： Texas Instruments Incorporated
发明人： Vadim V. Ivanov , Vaibhav Kumar , Munaf H. Shaik
IPC分类号： H03F3/68 , H03F3/45 , H03F1/32 , H03F3/21
CPC分类号： H03F3/68 , H03F1/086 , H03F1/14 , H03F1/3211 , H03F1/3223 , H03F3/211 , H03F3/45183 , H03F3/45475 , H03F3/45959 , H03F3/45986 , H03F3/72 , H03F2200/135 , H03F2200/156 , H03F2200/405 , H03F2200/459 , H03F2200/78 , H03F2201/3218 , H03F2203/45026 , H03F2203/45366 , H03F2203/45424 , H03F2203/45434 , H03F2203/45528 , H03F2203/45544 , H03F2203/45548 , H03F2203/45594 , H03F2203/45614 , H03F2203/45616 , H03F2203/45636 , H03F2203/45674 , H03F2203/45724 , H03F2203/45726 , H03F2203/7206
摘要： Described examples include multistage amplifier circuits having first and second forward circuits, a comparator or sensor circuit coupled to sense a signal in the second forward circuit to identify nonlinear operation or slewing conditions in the multistage amplifier circuit, and one or more sample hold circuits operative according to a sensor circuit output signal to selectively maintain the amplitude of an amplifier input signal in the second forward circuit and/or in a feedback circuit in response to the sensor circuit output signal indicating nonlinear operation or slewing conditions in the multistage amplifier circuit. Certain examples further include a clamping circuit operative to selectively maintain a voltage at a terminal of a Miller compensation capacitance responsive to the comparator output signal indicating nonlinear operation or slewing conditions.

2. 发明申请

US20170085251A1 PREAMPLIFIER 审中-公开
公开(公告)号：US20170085251A1
公开(公告)日：2017-03-23
申请号：US15083297
申请日：2016-03-29
申请人： uPI Semiconductor Corp.
发明人： Wen-Sheng Lin
IPC分类号： H03H19/00 , H03F3/387
CPC分类号： H03H19/004 , H03F3/45475 , H03F3/45968 , H03F3/68 , H03F2200/271 , H03F2200/411 , H03F2203/45138 , H03F2203/45522 , H03F2203/45528 , H03F2203/45562 , H03F2203/45616 , H03F2203/45644 , H03F2203/45726
摘要： A preamplifier including a programmable gain amplifying circuit and a filtering circuit is provided. The programmable gain amplifying circuit has a single output terminal. The filtering circuit includes a first switched-capacitor filter and a second switched-capacitor filter. The first switched-capacitor filter is coupled to the single output terminal. The second switched-capacitor filter is connected in parallel with the first switched-capacitor filter. The first switched-capacitor filter and the second switched-capacitor filter are respectively switched between a first mode and a second mode. When the first switched-capacitor filter is switched to the first mode, the second switched-capacitor filter is switched to the second mode.

3. 发明申请

US20170077883A1 SELF-REGULATED REFERENCE FOR SWITCHED CAPACITOR CIRCUIT 有权
标题翻译：用于开关电容器电路的自调节参考
公开(公告)号：US20170077883A1
公开(公告)日：2017-03-16
申请号：US15166066
申请日：2016-05-26
申请人： MediaTek Inc.
发明人： Wen-Hua Chang
IPC分类号： H03F3/45 , H03H7/00
CPC分类号： H03F3/45686 , H03F1/083 , H03F1/30 , H03F3/005 , H03F3/45 , H03F3/45273 , H03F2200/151 , H03F2200/153 , H03F2200/159 , H03F2200/42 , H03F2200/75 , H03F2203/45012 , H03F2203/45061 , H03F2203/45156 , H03F2203/45221 , H03F2203/45244 , H03F2203/45514 , H03F2203/45546 , H03F2203/45551 , H03F2203/45616 , H03H7/004
摘要： A switched-capacitor circuit comprising a differential operational amplifier and a feedback circuit is described. In some embodiments, the feedback circuit may be configured to provide a reference voltage that is insensitive to temperature and/or process variations. In some embodiments, the feedback circuit may be configured to mitigate the time delay associated with one or more capacitors of the switched-capacitor circuit. The switched-capacitor circuit may be controlled by a pair of control signals. During a first phase, one or more capacitors may be charged, or discharged, through an input signal. During a second phase, the electric charge of the one or more capacitors may be retained.
摘要翻译：描述了包括差分运算放大器和反馈电路的开关电容器电路。在一些实施例中，反馈电路可以被配置为提供对温度和/或过程变化不敏感的参考电压。在一些实施例中，反馈电路可以被配置为减轻与开关电容器电路的一个或多个电容器相关联的时间延迟。开关电容电路可以由一对控制信号控制。在第一阶段期间，可以通过输入信号对一个或多个电容器进行充电或放电。在第二阶段期间，可以保持一个或多个电容器的电荷。

4. 发明申请

US20170063309A1 METHODS AND APPARATUS FOR REDUCING TRANSIENT GLITCHES IN AUDIO AMPLIFIERS 审中-公开
标题翻译：用于减少音频放大器中瞬态玻璃的方法和装置
公开(公告)号：US20170063309A1
公开(公告)日：2017-03-02
申请号：US15186273
申请日：2016-06-17
申请人： QUALCOMM Incorporated
发明人： Kshitij YADAV , Vijayakumar DHANASEKARAN
IPC分类号： H03F1/26 , H04B1/40 , H04R3/00 , H03F3/183 , H03F3/45
CPC分类号： H03F1/26 , H03F1/0277 , H03F1/305 , H03F1/34 , H03F3/183 , H03F3/187 , H03F3/211 , H03F3/213 , H03F3/45475 , H03F3/72 , H03F2200/03 , H03F2200/129 , H03F2200/135 , H03F2200/144 , H03F2200/153 , H03F2200/156 , H03F2200/159 , H03F2200/234 , H03F2200/312 , H03F2200/372 , H03F2200/408 , H03F2200/414 , H03F2200/421 , H03F2200/459 , H03F2203/21109 , H03F2203/45051 , H03F2203/45116 , H03F2203/45118 , H03F2203/45134 , H03F2203/45138 , H03F2203/45156 , H03F2203/45206 , H03F2203/45221 , H03F2203/45264 , H03F2203/45276 , H03F2203/45512 , H03F2203/45526 , H03F2203/45528 , H03F2203/45534 , H03F2203/45546 , H03F2203/45548 , H03F2203/45601 , H03F2203/45616 , H03F2203/45632 , H03F2203/45652 , H03F2203/45682 , H03F2203/45698 , H03F2203/45718 , H03F2203/45726 , H03F2203/7212 , H03F2203/7215 , H03F2203/7224 , H03F2203/7231 , H04B1/40 , H04R3/007
摘要： An audio amplifier, including: at least a two stage amplifier configured to receive an input signal and output an amplified output signal, the at least a two stage amplifier including at least one stage amplifier and an output stage amplifier; and an auxiliary stage amplifier having an input coupled to an output of the at least one stage amplifier and an input of the output stage amplifier.
摘要翻译：一种音频放大器，包括：至少两级放大器，被配置为接收输入信号并输出放大的输出信号，所述至少两级放大器包括至少一个级放大器和输出级放大器; 以及辅助级放大器，其具有耦合到所述至少一个级放大器的输出和所述输出级放大器的输入的输入。

5. 发明申请

US20160099695A1 SEMICONDUCTOR INTEGRATED CIRCUIT, VARIABLE GAIN AMPLIFIER, AND SENSING SYSTEM 有权
标题翻译：半导体集成电路，可变增益放大器和感应系统
公开(公告)号：US20160099695A1
公开(公告)日：2016-04-07
申请号：US14865204
申请日：2015-09-25
申请人： Renesas Electronics Corporation
发明人： Masahide Kiritani
IPC分类号： H03G3/02 , H03F3/04
CPC分类号： H03G3/02 , H03F3/08 , H03F3/45475 , H03F3/50 , H03F2203/45138 , H03F2203/45522 , H03F2203/45528 , H03F2203/45534 , H03F2203/45591 , H03F2203/45601 , H03F2203/45616 , H03G3/08
摘要： Provided is a semiconductor integrated circuit including a pad Pd1 provided on one end side of a resistive element R1 externally provided, a pad Pd5 provided on a different end side of the resistive element R1; an operation amplifier A1, a signal line L11 wired between an output terminal of the operation amplifier A1 and the pad Pd1, a signal line L21 wired between an inverting input terminal of the operation amplifier A1 and the pad Pd5, a ESD protection element r11 provided to the signal line L11, and a signal line L31, through which a voltage signal of the pad Pd1 is transmitted. The signal line L31 is connected to the pad Pd1.
摘要翻译：提供了一种半导体集成电路，其包括设置在外部设置的电阻元件R1的一端侧的焊盘Pd1，设置在电阻元件R1的不同端侧的焊盘Pd5; 运算放大器A1，连接在运算放大器A1的输出端子和焊盘Pd1之间的信号线L11，布线在运算放大器A1的反相输入端子和焊盘Pd5之间的信号线L21，设置有ESD保护元件r11 信号线L11以及发送焊盘Pd1的电压信号的信号线L31。信号线L31连接到焊盘Pd1。

6. 发明申请

US20150303954A1 SYSTEM, METHOD, AND APPARATUS FOR ANALOG SIGNAL CONDITIONING OF HIGH-SPEED DATA STREAMS 有权
标题翻译：用于高速数据流的模拟信号调节的系统，方法和装置
公开(公告)号：US20150303954A1
公开(公告)日：2015-10-22
申请号：US14689036
申请日：2015-04-16
申请人： BROADCOM CORPORATION
发明人： Davide Guermandi , Silvian Spiridon , Dongsoo Daniel Koh , Stefano Bozzola , Han Yan , Mattia Introini , Tao Wu
IPC分类号： H04B1/10 , H03F1/32 , H04B1/00
CPC分类号： H04B1/10 , H03F1/32 , H03F3/45475 , H03F2200/336 , H03F2200/411 , H03F2203/45212 , H03F2203/45528 , H03F2203/45591 , H03F2203/45594 , H03F2203/45616 , H03G1/0088 , H04B1/0017
摘要： A device includes circuitry configured to receive a signal burst, apply one or more filters to the signal burst based to achieve a predetermined image rejection rate, apply at least one harmonic rejection mode to the signal burst, and amplify the signal burst based on a gain partitioning determination.
摘要翻译：一种设备包括被配置为接收信号脉冲串的电路，基于信号脉冲串施加一个或多个滤波器以实现预定的图像抑制率，对信号脉冲串施加至少一个谐波抑制模式，并且基于增益放大信号脉冲串划分确定。

7. 发明授权

US09112465B2 Digital calibration of programmable gain amplifiers 有权
标题翻译：可编程增益放大器的数字校准
公开(公告)号：US09112465B2
公开(公告)日：2015-08-18
申请号：US14067994
申请日：2013-10-31
申请人： Sanjoy K. Dey , Mayank Jain
发明人： Sanjoy K. Dey , Mayank Jain
IPC分类号： H03G1/00 , H03F1/02 , H03G3/00 , H03F3/45
CPC分类号： H03G1/0088 , H03F3/45475 , H03F3/45977 , H03F2200/321 , H03F2203/45048 , H03F2203/45528 , H03F2203/45534 , H03F2203/45536 , H03F2203/45594 , H03F2203/45616 , H03G3/001
摘要： A programmable gain amplifier (PGA) includes an op amp, an input circuit, a feedback circuit, and a calibration circuit. The input circuit is connected between a PGA input node and an op-amp input node and selectively applies the analog input signal to the op-amp input node. The feedback circuit is connected between an op-amp output node and the op-amp input node and applies the amplified analog output signal as a feedback signal to the op-amp input node. The calibration circuit is connected between a calibration reference node and the op-amp input node and selectively connects the calibration reference node directly to the op-amp input node without traversing any of the input circuit. The PGA may be implemented as a single-ended or differential amplifier. The PGA avoids reduced linearity resulting from series combinations of switches in the input circuit when configured for its normal operating mode.
摘要翻译：可编程增益放大器（PGA）包括运算放大器，输入电路，反馈电路和校准电路。输入电路连接在PGA输入节点和运算放大器输入节点之间，并选择性地将模拟输入信号应用于运算放大器输入节点。反馈电路连接在运算放大器输出节点和运算放大器输入节点之间，并将放大的模拟输出信号作为反馈信号施加到运算放大器输入节点。校准电路连接在校准参考节点和运算放大器输入节点之间，并选择性地将校准参考节点直接连接到运算放大器输入节点，而不会跳过任何输入电路。 PGA可以实现为单端或差分放大器。当配置为正常工作模式时，PGA避免了输入电路中开关串联组合引起的线性度降低。

8. 发明申请

US20150229277A1 CANCELLATION OF DISTORTION INDUCED BY ELEVATED OP-AMP BIAS CURRENT 审中-公开
标题翻译：由高电压偏置电流引起的失效消除
公开(公告)号：US20150229277A1
公开(公告)日：2015-08-13
申请号：US14530358
申请日：2014-10-31
申请人： LINEAR TECHNOLOGY CORPORATION
发明人： Glen James BRISEBOIS , Raymond T. PERRY , Guy M. HOOVER
IPC分类号： H03F1/08 , H03F3/45
CPC分类号： H03F1/083 , H03F1/3211 , H03F3/45076 , H03F3/45278 , H03F2200/372 , H03F2203/45116 , H03F2203/45136 , H03F2203/45171 , H03F2203/45222 , H03F2203/45536 , H03F2203/45616 , H03F2203/45618
摘要： An operational amplifier circuit reduces signal distortion in switching circuits resulting from flow of bias current through an analog switch having a resistance that changes with a common mode voltage level. The circuit includes an operational amplifier, and first, second, and third switches monolithically integrated on a same integrated circuit substrate. The first switch is connected in a feedback path of the operational amplifier between an output and an inverting input of the operational amplifier. The second and third switches each have one terminal connected to a non-inverting input of the operational amplifier and another terminal receiving a respective input signal, and operate to provide a selected input signal to the amplifier. The first switch operates in a conducting state before, during, and after any period in which any of the second and third switches is in the conducting state. The switches may be analog switches having same operational characteristics.
摘要翻译：运算放大器电路通过具有随着共模电压电平变化的电阻的模拟开关而减小由偏置电流的流动引起的开关电路中的信号失真。该电路包括运算放大器以及单片集成在同一集成电路基板上的第一，第二和第三开关。第一开关连接在运算放大器的反馈路径中，运算放大器的输出和反相输入端之间。第二和第三开关各自具有连接到运算放大器的非反相输入的一个端子和接收相应输入信号的另一个端子，并且操作以向放大器提供所选择的输入信号。第一开关在任何第二和第三开关处于导通状态的任何周期之前，期间和之后工作在导通状态。开关可以是具有相同操作特性的模拟开关。

9. 发明授权

US08963631B2 Signal amplifying circuit of communication device 有权
标题翻译：通信设备信号放大电路
公开(公告)号：US08963631B2
公开(公告)日：2015-02-24
申请号：US13770488
申请日：2013-02-19
申请人： Realtek Semiconductor Corp.
发明人： Shan-Chih Tsou
IPC分类号： H03F1/02 , H03F3/45
CPC分类号： H03F3/45071 , H03F3/45475 , H03F2203/45526 , H03F2203/45611 , H03F2203/45616 , H03F2203/45618
摘要： A signal amplifying circuit of a communication device is disclosed including: an amplifier comprising a first input terminal, a second input terminal, and an output terminal, wherein the input terminal is coupled with a fixed voltage level; a feedback circuit coupled with the second input terminal and the output terminal of the amplifier; a digital-to-analog converter (DAC); a signal processing circuit; a switch for selectively coupling the second input terminal of the amplifier with the DAC or the signal processing circuit; and a control unit coupled with the switch for controlling the operations of the switch.
摘要翻译：公开了一种通信装置的信号放大电路，包括：放大器，包括第一输入端子，第二输入端子和输出端子，其中所述输入端子与固定电压电平耦合; 与放大器的第二输入端子和输出端子耦合的反馈电路; 数模转换器（DAC）; 信号处理电路; 用于选择性地将放大器的第二输入端与DAC或信号处理电路耦合的开关; 以及与开关耦合的控制单元，用于控制开关的操作。

10. 发明申请

US20150048885A1 GAIN CONTROL CIRCUIT AND METHOD CAPABLE OF EASING LEAKAGE CURRENT INFLUENCE 有权
标题翻译：增益控制电路和方法可以消除泄漏电流的影响
公开(公告)号：US20150048885A1
公开(公告)日：2015-02-19
申请号：US14334498
申请日：2014-07-17
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Ming-Cheng Chiang , Yuan-Ping Hsu , Li-Lung Kao
IPC分类号： H03G3/00 , H03F3/45
CPC分类号： H03G1/0023 , H03F3/45475 , H03F2203/45528 , H03F2203/45534 , H03F2203/45596 , H03F2203/45616 , H03G1/0088 , H03G3/20
摘要： The present invention discloses a gain control circuit capable of easing leakage current influence. According to an embodiment of the present invention, the gain control circuit comprises: at least one signal input end for receiving at least one input signal; a signal output end for outputting an output signal; an amplifier coupled between an amplifier input end and the signal output end; and a plurality of gain schemes. Each of the gain schemes is set between the at least one signal input end and the signal output end; and when one of the gain schemes is activated to generate the output signal, the rest gain schemes are inactivated to stop gain production and concurrently discharge leakage currents through their respective grounding paths.
摘要翻译：本发明公开了一种能够缓解漏电流影响的增益控制电路。根据本发明的实施例，增益控制电路包括：用于接收至少一个输入信号的至少一个信号输入端; 用于输出输出信号的信号输出端; 耦合在放大器输入端和信号输出端之间的放大器; 和多个增益方案。每个增益方案被设置在至少一个信号输入端和信号输出端之间; 并且当其中一个增益方案被激活以产生输出信号时，其余的增益方案被停用以停止增益产生并同时通过它们各自的接地路径泄漏泄漏电流。

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