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1. 发明申请

WO2013130899A1 LOAD CURRENT SENSING 审中-公开
标题翻译：负载电流检测
公开(公告)号：WO2013130899A1
公开(公告)日：2013-09-06
申请号：PCT/US2013/028446
申请日：2013-02-28
申请人： QUALCOMM INCORPORATED
发明人： SRIVASTAVA, Ankit , SIENKO, Matthew D. , AZIN, Meysam , QUAN, Xiaohong , SHAH, Peter J.
IPC分类号： H03F3/217 , H03F1/52 , H03F3/45
CPC分类号： H03F3/2173 , H03F1/523 , H03F3/45179 , H03F3/45183 , H03F3/45475 , H03F2200/426 , H03F2200/462 , H03F2200/471 , H03F2200/481 , H03F2203/45522 , H03F2203/45526
摘要： Techniques for sensing current delivered to a load by a differential output stage, e.g., in a Class D amplifier. In one aspect, voltages across sense resistors (120, 122) coupled in series with first and second branches of the differential output stage are low-passed filtered (130) and digitized (140). The sense resistors (120,122) may be coupled in series with the sources of transistors (103, 108) of the first and second branches, wherein the transistors (103, 108) are selectively switchable on and off by input driving voltages (Vin, Vip). The input driving voltages (Vin, Vip) may correspond to a ternary voltage waveform such that during a given phase, the two transistors (103, 108) coupled in series with the sense resistors (120, 122) may be turned off. Further aspects provide for having cascoded transistors, and the sense resistors being provided between a pair of cascoded transistors.
摘要翻译：用于感测由差分输出级（例如D类放大器）传送到负载的电流的技术。在一个方面，与差分输出级的第一和第二分支串联耦合的感测电阻器（120,122）之间的电压被低通滤波（130）并数字化（140）。检测电阻器（120,122）可以与第一和第二分支的晶体管（103,108）的源极串联耦合，其中晶体管（103,108）可以通过输入驱动电压（Vin，Vip）被选择性地切换）。输入驱动电压（Vin，Vip）可以对应于三态电压波形，使得在给定相位期间，与感测电阻器（120,122）串联耦合的两个晶体管（103,108）可能被关断。另外的方面提供了具有级联的晶体管，并且感测电阻器被提供在一对级联晶体管之间。

2. 发明申请

WO2013089446A1 AMPLIFIER AND FILTER HAVING VARIABLE GAIN AND CUTOFF FREQUENCY CONTROLLED LOGARITHMICALLY ACCORDING TO DIGITAL CODE 审中-公开
标题翻译：具有根据数字代码逻辑控制的可变增益和切换频率的放大器和滤波器
公开(公告)号：WO2013089446A1
公开(公告)日：2013-06-20
申请号：PCT/KR2012/010824
申请日：2012-12-13
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： LEE, Jong-Woo
IPC分类号： H03G3/20 , H03H11/12
CPC分类号： H03G3/002 , H03F3/45475 , H03F2203/45512 , H03F2203/45522 , H03G1/0088 , H03G3/001 , H03G9/20 , H03H11/1291
摘要： A variable gain amplifier circuit is provided. The circuit includes an operational amplifier for amplifying and outputting an input signal according to a cutoff frequency and a gain, a feedback resistor for changing a first resistance according to a first digital control code value which determines the cutoff frequency, and an input resistor for changing a second resistance according to a second digital control code value which is determined based on a difference of the first digital control code value and a gain code value. The gain is determined by a ratio of the first resistance and the second resistance and linearly changes on a decibel (dB) basis according to the first digital control code value, the cutoff frequency is inversely proportional to the first resistance and linearly changes on a log scale, and the variable gain can be easily set using the control code.
摘要翻译：提供可变增益放大器电路。该电路包括用于根据截止频率和增益放大和输出输入信号的运算放大器，用于根据确定截止频率的第一数字控制码值改变第一电阻的反馈电阻器，以及用于改变根据第一数字控制代码值和增益代码值的差值确定的第二数字控制代码值的第二电阻。增益由第一电阻和第二电阻的比率确定，并根据第一数字控制码值以分贝（dB）为基准线性变化，截止频率与第一电阻成反比，并且在对数线性上变化可以使用控制代码容易地设置可变增益。

3. 发明申请

WO2011036331A1 ADJUSTABLE CIRCUIT ARCHITECTURE 审中-公开
标题翻译：可调节电路架构
公开(公告)号：WO2011036331A1
公开(公告)日：2011-03-31
申请号：PCT/FI2009/050754
申请日：2009-09-22
申请人： NOKIA CORPORATION , KALTIOKALLIO, Mikko , RYYNÄNEN, Jussi
发明人： KALTIOKALLIO, Mikko , RYYNÄNEN, Jussi
IPC分类号： H03F1/32 , H03F3/19
CPC分类号： H03F1/34 , H03F1/3211 , H03F1/3241 , H03F3/19 , H03F3/191 , H03F3/45179 , H03F3/45183 , H03F2200/165 , H03F2200/168 , H03F2200/171 , H03F2200/294 , H03F2200/411 , H03F2203/45511 , H03F2203/45512 , H03F2203/45522 , H03F2203/45528 , H03F2203/45544 , H03F2203/45631 , H03F2203/45638 , H03F2203/45702
摘要： An amplifier circuitry having adjustable parameters is presented. The present amplifier circuitry includes a feedback loop, wherein the feedback loop converts (26) a signal to another frequency, filters (20) the signal in the other frequency, and restores (24) the filtered signal back to the original frequency for inputting the signal to an input of the amplifier (22). The feedback loop implements a band-stop filter (20) having an adjustable stopband causing the amplifier circuitry to have an adjustable band-pass response. A passband of the amplifier circuitry is changed from one operating frequency to another operating frequency by changing frequency conversion parameters of the feedback loop.
摘要翻译：提出了具有可调参数的放大器电路。本放大器电路包括反馈回路，其中反馈回路将信号转换（26）到另一个频率，对另一频率的信号进行滤波（20），并且将滤波后的信号恢复（24）到原始频率，以输入信号到放大器（22）的输入端。反馈环路实现具有可调节阻带的带阻滤波器（20），使得放大器电路具有可调节的带通响应。通过改变反馈回路的变频参数，将放大器电路的通带从一个工作频率改变到另一个工作频率。

4. 发明申请

WO2009065621A2 AMPLITUDE MODULATION CONTROLLER FOR POLAR TRANSMITTER 审中-公开
标题翻译：用于极性发射器的振幅调制控制器
公开(公告)号：WO2009065621A2
公开(公告)日：2009-05-28
申请号：PCT/EP2008/009976
申请日：2008-11-21
申请人： ST WIRELESS SA , RYTER, Roland
发明人： RYTER, Roland
CPC分类号： H03F1/0211 , H03C1/08 , H03F3/24 , H03F3/45475 , H03F2200/324 , H03F2200/504 , H03F2203/45138 , H03F2203/45522 , H03F2203/45526 , H03F2203/45591
摘要： Apparatus (170) for generating a modulation signal for use in modulating the power supply of a power amplifier (160) uses coarse and fine control for controlling the amplitude of the modulation signal, and thereby controlling the output power of the power amplifier (160). The modulation signal may be generated in the digital domain and converted to the analogue domain by a digital-to-analogue converter (20), with the digital-to-analogue converter (20) providing the fine control and a variable gain amplifier (40) providing the coarse control of the analogue signal.
摘要翻译：用于产生用于调制功率放大器（160）的电源的调制信号的装置（170）使用粗调和精细控制来控制调制信号的幅度，从而控制功率放大器（160）的输出功率，。调制信号可以在数字域中产生，并通过数模转换器（20）转换成模拟域，数模转换器（20）提供精细控制，可变增益放大器（40 ）提供模拟信号的粗略控制。

5. 发明申请

WO2008031072A1 GAIN ADJUSTMENT FOR PROGRAMMABLE GAIN AMPLIFIERS 审中-公开
标题翻译：可编程增益放大器的增益调整
公开(公告)号：WO2008031072A1
公开(公告)日：2008-03-13
申请号：PCT/US2007/077937
申请日：2007-09-07
申请人： NATIONAL SEMICONDUCTOR CORPORATION , HUGHES, Rodney, Alan
发明人： HUGHES, Rodney, Alan
IPC分类号： H03G1/00
CPC分类号： H03G1/0088 , H03F3/45475 , H03F2203/45136 , H03F2203/45522 , H03F2203/45526 , H03F2203/45534
摘要： A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback to the amplifier while the gain adjust circuit is arranged to boost or cut the gain of the gain selection circuit. The gain adjust circuit can be arranged as a trim adjustment to the overall gain of the PGA circuit, where a different trim adjustment can be mapped to each gain setting such as from a look-up table. In other example implementations, the PGA circuit can periodically switch between multiple gain settings using a modulation scheme such that the overall gain is blended between the various gain settings according to a duty cycle, pulse-width, or delta-sigma modulation, with a time averaging effect on the overall gain of the PGA circuit.
摘要翻译：可编程增益放大器（PGA）电路包括都被耦合到放大器的输出的增益调整电路和增益选择电路。增益选择电路完成对放大器的反馈，而增益调整电路被设置为提升或削减增益选择电路的增益。增益调整电路可以被布置为对PGA电路的总体增益的调整调整，其中可以将不同的调整调整映射到诸如查找表的每个增益设置。在其他示例实现中，PGA电路可以使用调制方案周期性地在多个增益设置之间切换，使得总体增益根据占空比，脉冲宽度或Δ-Σ调制在各种增益设置之间进行混合，具有时间对PGA电路整体增益的平均效应。

6. 发明申请

WO2005086957A3 HIGHLY LINEAR VARIABLE GAIN AMPLIFIER 审中-公开
标题翻译：高线性可变增益放大器
公开(公告)号：WO2005086957A3
公开(公告)日：2006-11-09
申请号：PCT/US2005008197
申请日：2005-03-10
申请人： GCT SEMICONDUCTOR INC , PARK JOONBAE , LEE SEUNG-WOOK , LEE JEONG-WOO , LEE KYEONGHO
发明人： PARK JOONBAE , LEE SEUNG-WOOK , LEE JEONG-WOO , LEE KYEONGHO
IPC分类号： H03F3/45 , H03F3/21
CPC分类号： H03F3/211 , H03F3/45475 , H03F3/45659 , H03F2203/45136 , H03F2203/45138 , H03F2203/45166 , H03F2203/45168 , H03F2203/45434 , H03F2203/45522 , H03F2203/45591
摘要： A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers (100, 110) to amplify complementary portions of a differential input signal (IN, INB). By using two single-ended amplifiers (100, 110) instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.
摘要翻译：可变增益放大器电路使用一对单端运算放大器（100,110）来放大差分输入信号（IN，INB）的互补部分。通过使用两个单端放大器（100,110）代替单个差分放大器，线性度显着提高。此外，消除共模反馈电路以及谐波失真和其它形式的噪声，这些噪声倾向于负面影响从电路输出的信号的质量。

7. 发明申请

WO2017132583A2 MULTI-CHANNEL CINEMA AMPLIFIER WITH POWER-SHARING, MESSAGING AND MULTI-PHASE POWER SUPPLY 审中-公开
公开(公告)号：WO2017132583A2
公开(公告)日：2017-08-03
申请号：PCT/US2017/015459
申请日：2017-01-27
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： HEALY, Andrew , VOGEL, Erich H. , POULAIN, Andrew M. , LONG, Gregory J. , BUTLER, Joel A. , LUCE, Angela S. , REVELLI, Luca , NURMUKHANOV, Dossym , COOK, Tanner , TRAVERSO M., Marcelo
IPC分类号： H04R5/04
CPC分类号： H04R5/04 , H03F1/301 , H03F3/183 , H03F3/2173 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2200/447 , H03F2200/468 , H03F2203/45512 , H03F2203/45522 , H03F2203/45528 , H03G3/3005 , H03G2201/208 , H03G2201/708 , H04R29/007 , H04R2420/05 , H04R2430/01 , H04S7/308 , H05B37/029
摘要： An integrated cinema amplifier a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.

8. 发明申请

WO2013152290A1 HEADPHONE AMPLIFIER 审中-公开
标题翻译：耳机放大器
公开(公告)号：WO2013152290A1
公开(公告)日：2013-10-10
申请号：PCT/US2013/035454
申请日：2013-04-05
申请人： MARVELL WORLD TRADE LTD. , ZHOU, Hao , SHUI, Tao , SONG, Yonghua , WANG, Yongxu , ZHANG, Haiqing
发明人： ZHOU, Hao , SHUI, Tao , SONG, Yonghua , WANG, Yongxu , ZHANG, Haiqing
IPC分类号： H03F3/21 , H03F1/08 , H03F1/34 , 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. 发明申请

WO2013127216A1 D类音频功率放大电路中实现自适应功能的电路结构审中-公开
公开(公告)号：WO2013127216A1
公开(公告)日：2013-09-06
申请号：PCT/CN2012/085933
申请日：2012-12-05
申请人：无锡华润矽科微电子有限公司
发明人：张殿军 , 吕永康 , 韦林军
IPC分类号： H03F3/217
CPC分类号： H03F3/181 , H03F3/187 , H03F3/20 , H03F3/217 , H03F3/45475 , H03F2200/03 , H03F2203/45522
摘要：本发明涉及一种D类音频功率放大电路中实现自适应功能的电路结构，包括依次串接的运算放大器、脉宽调制器和驱动级，运算放大器的输入端连接外部音频信号输出端，驱动级的输出端连接喇叭，并通过反馈回路连接运算放大器的输入端，该电路结构还包括载波自适应电路、频率自适应电路、驱动自适应电路和温度自适应电路中的一种或多种自适应电路。采用了本发明的D类音频功率放大电路中实现自适应功能的电路结构能分别对输入信号的幅度、频率、外界的温度以及驱动级输出电流的变化作出及时的自动调节，从而改善EMI、失真、功耗、频率响应、温度保护特性等诸多D类音频功放的性能，进而大幅提升用户体验，且该电路结构，其结构简单，成本低廉，应用范围广泛。

10. 发明申请

WO2010129065A3 VARIABLE GAIN AMPLIFIER 审中-公开
标题翻译：可变增益放大器
公开(公告)号：WO2010129065A3
公开(公告)日：2011-03-03
申请号：PCT/US2010001363
申请日：2010-05-06
申请人： MINDSPEED TECH INC , SHIVARAM KRISHNA , AHMED KASHIF A
发明人： SHIVARAM KRISHNA , AHMED KASHIF A
IPC分类号： H03G3/10 , H03F3/68
CPC分类号： H03F3/08 , H03F1/083 , H03F1/22 , H03F3/45098 , H03F3/45475 , H03F2200/411 , H03F2200/453 , H03F2203/45522 , H03F2203/45528 , H03F2203/45618 , H03F2203/45702 , H03F2203/45728 , H03G3/3084
摘要： Various amplifier configurations having increased bandwidth, linearity, dynamic range, and less distortion are shown and disclosed. To increase bandwidth in a transimpedance amplifier, a replica circuit is created to replicate a degeneration resistance, or the resistance or value that relates to a feedback resistance. From the replica circuit, the replicated values are mirrored and processed to control a FET switch which modifies a degeneration resistance. The FET switch control signal is related to the feedback resistance and modifies the degeneration resistance to thereby maintain the product of the feedback resistance and the degeneration resistance as a constant. In another embodiment, a second switch controlled by an automatic gain control signal is established between a first stage amplifier and a second stage amplifier to improve dynamic range and bandwidth without degrading other amplifier specifications.
摘要翻译：显示和公开了具有增加的带宽，线性，动态范围和较小失真的各种放大器配置。为了增加跨阻放大器中的带宽，创建复制电路以复制退化电阻或与反馈电阻相关的电阻或值。从复制电路中，复制的值被镜像并被处理以控制修改退化电阻的FET开关。 FET开关控制信号与反馈电阻相关，并且改变退化电阻，从而将反馈电阻和退化电阻的乘积保持为常数。在另一个实施例中，在第一级放大器和第二级放大器之间建立由自动增益控制信号控制的第二开关，以改善动态范围和带宽，而不降低其他放大器规格。

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