公开(公告)号：US09124227B2

公开(公告)日：2015-09-01

申请号：US13622170

申请日：2012-09-18

Applicant: Minsheng Wang ,  Iuri Mehr ,  Jungwoo Song ,  Vinay Chandrasekhar

Inventor： Minsheng Wang ,  Iuri Mehr ,  Jungwoo Song ,  Vinay Chandrasekhar

IPC: H03F99/00 ,  H03F1/34 ,  H03F1/32 ,  H03F3/187 ,  H03F3/45 ,  H03G3/30

CPC classification number: H03F1/34 ,  H03F1/3211 ,  H03F3/187 ,  H03F3/45475 ,  H03F2203/45521 ,  H03G3/3005

Abstract: Systems and methods are disclosed to provide automatic power control for a driver circuit. Embodiments disclosed herein enable a driver circuit to automatically decrease the gain of amplified input signals when output power exceeds a threshold. Further, embodiments disclosed herein enable a driver circuit to automatically increase the gain of amplified input signals when battery supply voltage drops to avoid unwanted output signal distortion. By using reference signals for battery power and amplified signal input, the amplifiers of the driver circuit can be automatically adjusted until an equilibrium is reached.

Abstract translation: 公开了系统和方法来为驱动器电路提供自动功率控制。 当输出功率超过阈值时，本文公开的实施例使得驱动器电路能够自动降低放大的输入信号的增益。 此外，本文公开的实施例使得当电池电源电压下降时，驱动器电路自动地增加放大的输入信号的增益，以避免不期望的输出信号失真。 通过使用电池电源和放大信号输入的参考信号，可以自动调节驱动电路的放大器，直到达到平衡。

公开(公告)号：US20140079246A1

公开(公告)日：2014-03-20

申请号：US13622170

申请日：2012-09-18

Applicant: Minsheng Wang ,  Iuri Mehr ,  Jungwoo Song ,  Vinay Chandrasekhar

Inventor： Minsheng Wang ,  Iuri Mehr ,  Jungwoo Song ,  Vinay Chandrasekhar

IPC: H03G3/20 ,  H03F1/34 ,  H03F99/00 ,  H03F3/45

CPC classification number: H03F1/34 ,  H03F1/3211 ,  H03F3/187 ,  H03F3/45475 ,  H03F2203/45521 ,  H03G3/3005

Abstract: Systems and methods are disclosed to provide automatic power control for a driver circuit. Embodiments disclosed herein enable a driver circuit to automatically decrease the gain of amplified input signals when output power exceeds a threshold. Further, embodiments disclosed herein enable a driver circuit to automatically increase the gain of amplified input signals when battery supply voltage drops to avoid unwanted output signal distortion. By using reference signals for battery power and amplified signal input, the amplifiers of the driver circuit can be automatically adjusted until an equilibrium is reached.

Abstract translation: 公开了系统和方法来为驱动器电路提供自动功率控制。 当输出功率超过阈值时，本文公开的实施例使得驱动器电路能够自动降低放大的输入信号的增益。 此外，本文公开的实施例使得当电池电源电压下降时，驱动器电路自动地增加放大的输入信号的增益，以避免不期望的输出信号失真。 通过使用电池电源和放大信号输入的参考信号，可以自动调节驱动电路的放大器，直到达到平衡。

公开(公告)号：US08482347B2

公开(公告)日：2013-07-09

申请号：US12930487

申请日：2011-01-07

Applicant: Iuri Mehr ,  Sherif Galal ,  Todd L. Brooks

Inventor： Iuri Mehr ,  Sherif Galal ,  Todd L. Brooks

IPC: H03F1/14

CPC classification number: H03F3/187 ,  H03F1/305 ,  H03F3/72 ,  H03F2200/411 ,  H03F2203/7236

Abstract: Disclosed is an amplifier designed to substantially reduce an ON/OFF transient. The amplifier comprises a drive block that includes a pre-driver and an output stage. The amplifier also comprises a bypass circuit that is coupled to an output of the pre-driver. The bypass circuit of the amplifier is selectively activated to reduce the ON/OFF transient. The bypass circuit may comprise an auxiliary output stage that can be coupled to provide selective activation. The amplifier may also be configured to provide multi-point offset compensation. Also disclosed is a related method. The amplifier and the related method may be incorporated into an audio amplifier used in a cellular telephone or other mobile audio device.

Abstract translation: 公开了一种设计用于大大减少ON / OFF瞬变的放大器。 该放大器包括一个包括一个预驱动器和一个输出级的驱动块。 放大器还包括耦合到预驱动器的输出的旁路电路。 选择性地激活放大器的旁路电路以减少ON / OFF瞬变。 旁路电路可以包括可以耦合以提供选择性激活的辅助输出级。 放大器还可以被配置为提供多点偏移补偿。 还公开了相关方法。 放大器和相关方法可以结合到用于蜂窝电话或其它移动音频设备的音频放大器中。

公开(公告)号：US07091792B2

公开(公告)日：2006-08-15

申请号：US10849738

申请日：2004-05-20

Applicant: Iuri Mehr

Inventor： Iuri Mehr

IPC: H03F3/04

CPC classification number: H03F3/189 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/331 ,  H03F2200/372

Abstract: Methods and apparatus for amplifying a tuner input signal are disclosed. One embodiment of the invention is directed to a tuner amplifier system comprising a tuner amplifier input that receives a tuner amplifier input signal and a first amplifier comprising an input and an output. The input of the first amplifier is coupled to the tuner amplifier input. The system further comprises a second amplifier comprising an input and an output, the input of the second amplifier being coupled to the tuner amplifier input, and a switch adapted to couple one of the first amplifier output and the second amplifier output to an output of the tuner amplifier. Another embodiment of the invention is directed to a method of amplifying a tuner input signal. The method comprises acts of detecting a power of the tuner input signal, selecting a tuner amplifier to amplify the tuner input signal based on the power of the tuner input signal, and amplifying the tuner input signal using the selected amplifier.

Abstract translation: 公开了放大调谐器输入信号的方法和装置。 本发明的一个实施例涉及一种包括接收调谐放大器输入信号的调谐放大器输入和包括输入和输出的第一放大器的调谐器放大器系统。 第一放大器的输入耦合到调谐放大器输入端。 该系统还包括第二放大器，其包括输入和输出，第二放大器的输入耦合到调谐放大器输入端，以及开关，适于将第一放大器输出和第二放大器输出之一耦合到 调谐放大器。 本发明的另一实施例涉及一种放大调谐器输入信号的方法。 该方法包括检测调谐器输入信号的功率的动作，基于调谐器输入信号的功率选择调谐放大器放大调谐器输入信号，以及使用所选择的放大器放大调谐器输入信号。

公开(公告)号：US20060166633A1

公开(公告)日：2006-07-27

申请号：US11044710

申请日：2005-01-27

Applicant: Iuri Mehr

Inventor： Iuri Mehr

IPC: H04B1/06

CPC classification number: H03G3/3052 ,  H03G2201/706 ,  H04B1/26

Abstract: In one aspect, an automatic gain control (AGC) for applying a variable gain to a broadband signal is provided. The AGC comprises a variable gain amplifier adapted to receive the broadband signal as an input, the variable gain amplifier configured to apply a variable gain to the broadband signal based on a value of a gain signal to provide an amplified broadband signal, and a controller to provide the gain signal to the variable gain amplifier, the controller adapted to determine the value of the gain signal based on at least one characteristic of the amplified broadband signal. In a further aspect, the one or more characteristic is a power characteristic of the broadband signal that facilitates control of the broadband signal within a desired power range.

公开(公告)号：US20050258904A1

公开(公告)日：2005-11-24

申请号：US10849738

申请日：2004-05-20

Applicant: Iuri Mehr

Inventor： Iuri Mehr

IPC: H03F3/189 ,  H03F3/191 ,  H03F3/72

CPC classification number: H03F3/189 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/331 ,  H03F2200/372

Abstract: Methods and apparatus for amplifying a tuner input signal are disclosed. One embodiment of the invention is directed to a tuner amplifier system comprising a tuner amplifier input that receives a tuner amplifier input signal and a first amplifier comprising an input and an output. The input of the first amplifier is coupled to the tuner amplifier input. The system further comprises a second amplifier comprising an input and an output, the input of the second amplifier being coupled to the tuner amplifier input, and a switch adapted to couple one of the first amplifier output and the second amplifier output to an output of the tuner amplifier. Another embodiment of the invention is directed to a method of amplifying a tuner input signal. The method comprises acts of detecting a power of the tuner input signal, selecting a tuner amplifier to amplify the tuner input signal based on the power of the tuner input signal, and amplifying the tuner input signal using the selected amplifier.

Abstract translation: 公开了放大调谐器输入信号的方法和装置。 本发明的一个实施例涉及一种包括接收调谐放大器输入信号的调谐放大器输入和包括输入和输出的第一放大器的调谐器放大器系统。 第一放大器的输入耦合到调谐放大器输入端。 该系统还包括第二放大器，其包括输入和输出，第二放大器的输入耦合到调谐放大器输入端，以及开关，适于将第一放大器输出和第二放大器输出之一耦合到 调谐放大器。 本发明的另一实施例涉及一种放大调谐器输入信号的方法。 该方法包括检测调谐器输入信号的功率的动作，基于调谐器输入信号的功率选择调谐放大器放大调谐器输入信号，以及使用所选择的放大器放大调谐器输入信号。

公开(公告)号：US20050094736A1

公开(公告)日：2005-05-05

申请号：US10698976

申请日：2003-10-31

Applicant: Prabir Maulik ,  Paul Hendriks ,  Iuri Mehr

Inventor： Prabir Maulik ,  Paul Hendriks ,  Iuri Mehr

IPC: H04B3/00 ,  H04L25/00 ,  H04L25/02

CPC classification number: H04L25/028 ,  H04L25/0282 ,  H04L25/029

Abstract: A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation.

Abstract translation: 提供了多功能，可编程，低成本的传输线驱动器。 线路驱动器包括数模转换器，其接收数字输入并提供模拟输出。 线路驱动器可在电压工作模式之间进行重新配置。

公开(公告)号：US06756842B2

公开(公告)日：2004-06-29

申请号：US10141191

申请日：2002-05-08

Applicant: Iuri Mehr ,  Lawrence A. Singer ,  Wenhua Yang

Inventor： Iuri Mehr ,  Lawrence A. Singer ,  Wenhua Yang

IPC: H03F102

CPC classification number: H03F3/45762 ,  H03F3/005 ,  H03F3/45188 ,  H03F3/45632 ,  H03F2200/331 ,  H03F2203/45652

Abstract: An a.c. coupled multistage high gain operational amplifier includes at least two gain stages, each having an input and an output; an a.c. coupling level shifting capacitance interconnecting the output of a first stage to the input of a second stage; and a charging circuit interconnecting with the a.c. coupling level shifting capacitance and the input of the second stage to charge the a.c. coupling level shifting capacitance in a track phase and to connect the a.c. coupling capacitance to the input of the second stage during a hold phase for dissociating the bias voltages of the stages.

Abstract translation: 一个 耦合多级高增益运算放大器包括至少两个增益级，每个具有输入和输出; 一个a.c. 将第一级的输出互连到第二级的输入的耦合电平移位电容; 和一个充电电路互相连接。 耦合电平移动电容和第二级的输入为a.c.充电。 耦合电平移位电容在轨道相位并连接a.c. 在用于解除级的偏置电压的保持阶段期间将电容耦合到第二级的输入。