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公开(公告)号：US07994847B1
公开(公告)日：2011-08-09
申请号：US12606746
申请日：2009-10-27
Applicant: David M. Signoff , Wayne A. Loeb
Inventor： David M. Signoff , Wayne A. Loeb
IPC: G05F1/10
CPC classification number: H03F1/30 , H03F3/195 , H03F3/24 , H03F3/3001 , H03F3/45475 , H03F2200/294 , H03F2200/411 , H03F2200/447 , H03F2200/555
Abstract: An amplifier biasing circuit that reduces gain variation in short channel amplifiers, an amplifier biasing circuit that produces a constant Gm biasing signal for short channel amplifiers, and a multistage amplifier that advantageously incorporates embodiment of both types of amplifier biasing circuits are described. Both amplifier biasing circuit approaches use an operational amplifier to equalize internal bias circuit voltages. The constant Gm biasing circuit produces a Gm of 1/R, where R is the value of a trim resistor value. The biasing circuit that reduces gain variation produces a Gm of approximately 1/R, where R is the value of a trim resistor value, however, the biasing circuit is configurable to adjust the bias circuit Gm to mitigate the impact of a wide range of circuit specific characteristics and a wide range of changes in the operational environment in which the circuit can used, such as changes in temperature.
Abstract translation: 描述了减少短通道放大器的增益变化的放大器偏置电路，为短通道放大器产生恒定的Gm偏置信号的放大器偏置电路以及有利地结合两种类型的放大器偏置电路的实施例的多级放大器。 两个放大器偏置电路方法都使用运算放大器来均衡内部偏置电路电压。 恒定Gm偏置电路产生1 / R的Gm，其中R是微调电阻值的值。 降低增益变化的偏置电路产生大约1 / R的Gm，其中R是调整电阻值的值，然而，偏置电路可配置为调整偏置电路Gm以减轻宽范围电路的影响 特定的特性和电路可以使用的操作环境的变化范围，例如温度变化。
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公开(公告)号：US07756486B1
公开(公告)日：2010-07-13
申请号：US11544163
申请日：2006-10-05
Applicant: Chun-Geik Tan , Randy Tsang , Wayne A. Loeb
Inventor： Chun-Geik Tan , Randy Tsang , Wayne A. Loeb
IPC: H04B1/38
CPC classification number: H04B1/525
Abstract: Circuits, methods, and apparatus that provide isolation between receive and transmit circuits in a wireless transceiver. One example provides switches that can be included on an integrated circuit with at least portions of a wireless transceiver. These switches vary the impedance of transmitter and receiver circuits between a termination impedance and a high impedance by inserting or removing components in parallel with matching networks. Signal losses are minimized since these switches are shunt connected to input and output paths on the wireless circuit and are not connected directly in either signal path.
Abstract translation: 在无线收发器中提供接收和发送电路之间隔离的电路，方法和装置。 一个示例提供可以包括在具有无线收发器的至少一部分的集成电路上的开关。 这些开关通过与匹配网络并联插入或删除组件来改变发射器和接收器电路在终端阻抗和高阻抗之间的阻抗。 信号损耗最小化，因为这些开关分流连接到无线电路上的输入和输出路径，并且不直接连接在任一信号路径中。
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公开(公告)号：US08442451B1
公开(公告)日：2013-05-14
申请号：US12827449
申请日：2010-06-30
Applicant: Chun-Geik Tan , Randy Tsang , Wayne A. Loeb
Inventor： Chun-Geik Tan , Randy Tsang , Wayne A. Loeb
IPC: H04B1/38
CPC classification number: H04B1/525
Abstract: Circuits, methods, and apparatus that provide isolation between receive and transmit circuits in a wireless transceiver. One example provides switches that can be included on an integrated circuit with at least portions of a wireless transceiver. These switches vary the impedance of transmitter and receiver circuits between a termination impedance and a high impedance by inserting or removing components in parallel with matching networks. Signal losses are minimized since these switches are shunt connected to input and output paths on the wireless circuit and are not connected directly in either signal path.
Abstract translation: 在无线收发器中提供接收和发送电路之间隔离的电路，方法和装置。 一个示例提供可以包括在具有无线收发器的至少一部分的集成电路上的开关。 这些开关通过与匹配网络并联插入或删除组件来改变发射器和接收器电路在终端阻抗和高阻抗之间的阻抗。 信号损耗最小化，因为这些开关分流连接到无线电路上的输入和输出路径，并且不直接连接在任一信号路径中。
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公开(公告)号：US07864498B1
公开(公告)日：2011-01-04
申请号：US12560397
申请日：2009-09-15
Applicant: Wayne A. Loeb , Alireza Shirvani-Mahdavi
Inventor： Wayne A. Loeb , Alireza Shirvani-Mahdavi
CPC classification number: H03F1/52 , H02H9/025 , H03F3/191 , H03F2200/231 , H03F2200/27 , H03F2200/435
Abstract: A circuit includes: an input of shunt circuitry to couple with an output of detection circuitry that provides a protection signal; an output of the shunt circuitry to couple with an input of power amplification circuitry; and the shunt circuitry configured to reduce a gain of the power amplification circuitry responsive to the protection signal, the shunt circuitry including a delay stage configured to continue shunting of an input signal of the power amplification circuitry for a time period corresponding to a turn on time of the power amplification circuitry. In addition, a method includes: receiving a protection signal from detection circuitry; responsive to the protection signal, shunting an input signal of power amplification circuitry to reduce a gain of the power amplification circuitry; and continuing the shunting for a time period corresponding to a turn on time of the power amplification circuitry.
Abstract translation: 电路包括：分流电路的输入端，与提供保护信号的检测电路的输出耦合; 分流电路的输出端与功率放大电路的输入耦合; 并且所述分流电路经配置以响应于所述保护信号而减小所述功率放大电路的增益，所述并联电路包括延迟级，所述延迟级配置成在对应于导通时间的时间段内继续对所述功率放大电路的输入信号进行分流 的功率放大电路。 另外，一种方法包括：从检测电路接收保护信号; 响应于保护信号，分流功率放大电路的输入信号以减小功率放大电路的增益; 并且在与功率放大电路的导通时间对应的时间段内继续分流。
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公开(公告)号：US07863976B1
公开(公告)日：2011-01-04
申请号：US12212598
申请日：2008-09-17
Applicant: Wayne A. Loeb , King Chun Tsai
Inventor： Wayne A. Loeb , King Chun Tsai
IPC: H03F1/14
CPC classification number: H03G1/0088 , H03F1/0261 , H03F1/0277 , H03F3/211 , H03F3/245 , H03F3/45085 , H03F3/602 , H03F2200/09 , H03F2200/18 , H03F2200/423 , H03F2200/451 , H03F2200/541 , H03F2203/21139 , H03F2203/21178 , H03F2203/45731 , H04B1/0483
Abstract: An adjustable stage in an amplifier. The adjustable stage generally comprises a first common node, a second common node and a plurality of independently selectable parallel amplifier segments. Each of the parallel segments may have an input at the first common node and an output at the second common node, a transistor and an inductor to resonate with a capacitance at a base of the transistor. The present invention advantageously provides a relatively compact power amplifier with an extended output power range at which the amplifier is highly efficient. In preferred embodiments, the input and output matching characteristics are generally independent of the number of selected output amplifier segments.
Abstract translation: 放大器中的可调节级。 可调节级通常包括第一公共节点，第二公共节点和多个可独立选择的并行放大器段。 每个并行段可以具有在第一公共节点处的输入和第二公共节点处的输出，晶体管和电感器，以与晶体管的基极处的电容谐振。 本发明有利地提供了一种具有扩展输出功率范围的相对紧凑的功率放大器，在该功率范围内放大器是高效率的。 在优选实施例中，输入和输出匹配特性通常与选择的输出放大器段的数量无关。
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Patent Agency Ranking
公开(公告)号：US07761067B1
公开(公告)日：2010-07-20
申请号：US10830117
申请日：2004-04-21
Applicant: King Chun Tsai , Sang Won Son , Wayne A. Loeb
Inventor： King Chun Tsai , Sang Won Son , Wayne A. Loeb
CPC classification number: H04B1/30 , H03H7/12 , H03H2007/013 , H03H2210/012 , H03H2210/015 , H03J2200/10 , H04B1/0475 , H04B1/1638
Abstract: Apparatus, systems, and methods implementing techniques for calibrating a filter circuit. A comparator generates an output based on a filter output amplitude signal and a reference amplitude signal. A calibration logic unit receives the comparator output and produces a component code that is used by the filter circuit to adjust one or more component values.
Abstract translation: 用于校准滤波电路的技术的装置，系统和方法。 比较器基于滤波器输出幅度信号和参考幅度信号产生输出。 校准逻辑单元接收比较器输出并产生由滤波器电路用于调整一个或多个分量值的分量代码。
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公开(公告)号：US07606016B1
公开(公告)日：2009-10-20
申请号：US11845660
申请日：2007-08-27
Applicant: Wayne A. Loeb , Alireza Shirvani-Mahdavi
Inventor： Wayne A. Loeb , Alireza Shirvani-Mahdavi
CPC classification number: H03F1/52 , H02H9/025 , H03F3/191 , H03F2200/231 , H03F2200/27 , H03F2200/435
Abstract: A power amplifier protection circuit that includes protection circuitry to variably shunt an input radio frequency (RF) signal to AC ground, turn off bias to an output transistor of a power amplifier, and turn off the output transistor. The power amplifier protection circuit features an asymmetrical control that can quickly shut off a power amplifier, and turn on the power amplifier at a steady, controlled rate when an output transistor exceeds a predetermined threshold voltage.
Abstract translation: 一种功率放大器保护电路，其包括用于将输入射频（RF）信号可变地分流到AC地的保护电路，将偏置关断到功率放大器的输出晶体管，并关闭输出晶体管。 功率放大器保护电路具有不对称控制，可以快速切断功率放大器，并在输出晶体管超过预定阈值电压时以稳定的受控速率接通功率放大器。
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公开(公告)号：US06829131B1
公开(公告)日：2004-12-07
申请号：US09395073
申请日：1999-09-13
Applicant: Wayne A. Loeb , John J. Neumann, Jr. , Kaigham J. Gabriel
Inventor： Wayne A. Loeb , John J. Neumann, Jr. , Kaigham J. Gabriel
IPC: H02H2300
CPC classification number: H04R19/005 , H04R17/00
Abstract: An acoustic transducer comprising a substrate; and a diaphragm formed by depositing a micromachined membrane onto the substrate. The diaphragm is formed as a single silicon chip using a CMOS MEMS (microelectromechanical systems) semiconductor fabrication process. The curling of the diaphragm during fabrication is reduced by depositing the micromachined membrane for the diaphragm in a serpentine-spring configuration with alternating longer and shorter arms. As a microspeaker, the acoustic transducer of the present invention converts a digital audio input signal directly into a sound wave, resulting in a very high quality sound reproduction at a lower cost of production in comparison to conventional acoustic transducers. The micromachined diaphragm may also be used in microphone applications.
Abstract translation: 包括基底的声学换能器; 以及通过将微加工膜沉积到基底上而形成的隔膜。 使用CMOS MEMS（微机电系统）半导体制造工艺将隔膜形成为单个硅芯片。 在制造期间，通过将用于隔膜的微加工膜沉积成具有交替的较长和较短臂的蛇形弹簧构型来减小隔膜的卷曲。 作为微型扬声器，与传统的声换能器相比，本发明的声换能器将数字音频输入信号直接转换成声波，从而以较低的生产成本产生非常高质量的声音再现。 微加工膜片也可用于麦克风应用。
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公开(公告)号：US09031527B1
公开(公告)日：2015-05-12
申请号：US12828113
申请日：2010-06-30
Applicant: King Chun Tsai , Sang Wong Son , Wayne A. Loeb
Inventor： King Chun Tsai , Sang Wong Son , Wayne A. Loeb
CPC classification number: H04B1/30 , H03H7/12 , H03H2007/013 , H03H2210/012 , H03H2210/015 , H03J2200/10 , H04B1/0475 , H04B1/1638
Abstract: Apparatus, systems, and methods implementing techniques for calibrating a filter circuit. A comparator generates an output based on a filter output amplitude signal and a reference amplitude signal. A calibration logic unit receives the comparator output and produces a component code that is used by the filter circuit to adjust one or more component values.
Abstract translation: 用于校准滤波电路的技术的装置，系统和方法。 比较器基于滤波器输出幅度信号和参考幅度信号产生输出。 校准逻辑单元接收比较器输出并产生由滤波器电路用于调整一个或多个分量值的分量代码。
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公开(公告)号：US08179648B1
公开(公告)日：2012-05-15
申请号：US12965223
申请日：2010-12-10
Applicant: Wayne A. Loeb , Alireza Shirvani-Mahdavi
Inventor： Wayne A. Loeb , Alireza Shirvani-Mahdavi
CPC classification number: H03F1/52 , H02H9/025 , H03F3/191 , H03F2200/231 , H03F2200/27 , H03F2200/435
Abstract: Systems, devices and techniques relating to power amplifier protection include, in some implementations, a circuit including: attenuation circuitry to couple with an output of detection circuitry that provides a protection signal and to couple with an input of power amplifier circuitry; turn off circuitry to couple with the power amplifier circuitry, the turn off circuitry configured to turn off the power amplifier circuitry responsive to the protection signal; and the attenuation circuitry configured to reduce a gain of the power amplifier circuitry responsive to the protection signal, the attenuation circuitry comprising a delay stage configured to continue attenuating an RF input signal of the power amplifier circuitry until after the power amplifier circuitry turns on.
Abstract translation: 在一些实施方式中，涉及功率放大器保护的系统，设备和技术包括：电路，包括：与提供保护信号并与功率放大器电路的输入耦合的检测电路的输出耦合的衰减电路; 关闭电路以与功率放大器电路耦合，所述关断电路被配置为响应于所述保护信号而关闭所述功率放大器电路; 并且所述衰减电路经配置以响应于所述保护信号而减小所述功率放大器电路的增益，所述衰减电路包括被配置为继续衰减所述功率放大器电路的RF输入信号的延迟级，直到所述功率放大器电路导通为止。
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