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1. 发明授权

US07864498B1 Power amplifier protection 有权
标题翻译：功率放大器保护
公开(公告)号：US07864498B1
公开(公告)日：2011-01-04
申请号：US12560397
申请日：2009-09-15
申请人： Wayne A. Loeb , Alireza Shirvani-Mahdavi
发明人： Wayne A. Loeb , Alireza Shirvani-Mahdavi
IPC分类号： H02H9/04 , H02H3/22
CPC分类号： H03F1/52 , H02H9/025 , H03F3/191 , H03F2200/231 , H03F2200/27 , H03F2200/435
摘要： 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.
摘要翻译：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。

2. 发明授权

US07606016B1 Power amplifier protection 有权
标题翻译：功率放大器保护
公开(公告)号：US07606016B1
公开(公告)日：2009-10-20
申请号：US11845660
申请日：2007-08-27
申请人： Wayne A. Loeb , Alireza Shirvani-Mahdavi
发明人： Wayne A. Loeb , Alireza Shirvani-Mahdavi
IPC分类号： H02H3/20 , H02H9/04
CPC分类号： H03F1/52 , H02H9/025 , H03F3/191 , H03F2200/231 , H03F2200/27 , H03F2200/435
摘要： 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.
摘要翻译：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。

3. 发明授权

US08179648B1 Power amplifier protection 有权
标题翻译：功率放大器保护
公开(公告)号：US08179648B1
公开(公告)日：2012-05-15
申请号：US12965223
申请日：2010-12-10
申请人： Wayne A. Loeb , Alireza Shirvani-Mahdavi
发明人： Wayne A. Loeb , Alireza Shirvani-Mahdavi
IPC分类号： H03G3/10 , H02H7/20
CPC分类号： H03F1/52 , H02H9/025 , H03F3/191 , H03F2200/231 , H03F2200/27 , H03F2200/435
摘要： 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.
摘要翻译：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。

4. 发明授权

US08340619B1 Phase synchronization of phased array or multiple receiver/transmitter systems 有权
标题翻译：相控阵或多个接收/发射系统的相位同步
公开(公告)号：US08340619B1
公开(公告)日：2012-12-25
申请号：US12695352
申请日：2010-01-28
申请人： Alireza Shirvani-Mahdavi , Saeed Chehrazi
发明人： Alireza Shirvani-Mahdavi , Saeed Chehrazi
IPC分类号： H04B1/26
CPC分类号： H04B1/26 , H03B21/02 , H04B7/04 , H04L27/00
摘要： In one embodiment, a local oscillator (LO) is configured to generate an LO signal. A transmission line receives the LO signal from the local oscillator and transmits the LO signal. A first set of taps and a second set of taps tap the transmission line to receive the LO signal. A plurality of transceiver blocks are configured to receive and transmit a plurality of phase-shifted radio frequency signals. Each transceiver block is coupled to a first tap and a second tap. Each LO signal received for a transceiver block is received with a different phase. However, the same reference phase may be calculated from a first LO signal received from the first tap and a second LO signal received from a second tap. Each transceiver block receives the reference LO signal having the reference phase determined from the first LO signal and the second LO signal.
摘要翻译：在一个实施例中，本地振荡器（LO）被配置为产生LO信号。传输线从本地振荡器接收LO信号并发送LO信号。第一组抽头和第二组抽头敲击传输线以接收LO信号。多个收发器块被配置为接收和发送多个相移射频信号。每个收发器模块耦合到第一抽头和第二抽头。为收发器模块接收的每个LO信号都以不同的相位接收。然而，可以从从第一抽头接收的第一LO信号和从第二抽头接收的第二LO信号来计算相同的参考相位。每个收发器块接收具有从第一LO信号和第二LO信号确定的参考相位的参考LO信号。

5. 发明授权

US07394278B1 Methods and apparatus for integrated circuit loopback testing 有权
标题翻译：集成电路环回测试的方法和装置
公开(公告)号：US07394278B1
公开(公告)日：2008-07-01
申请号：US11433128
申请日：2006-05-12
申请人： Alireza Shirvani-Mahdavi , George Chien
发明人： Alireza Shirvani-Mahdavi , George Chien
IPC分类号： G01R31/26
CPC分类号： G01R31/303 , G01R31/3025 , G01R31/31716
摘要： Methods and apparatus are provided for performing loopback testing of integrated circuits (“ICs”). In an embodiment of the invention, an IC can be tested on an undiced wafer by coupling a wireless transmitter of the IC to a wireless receiver of the IC. Core circuitry of the IC can be controlled to cause the transmitter to send at least one signal to the receiver. Upon receipt of the at least one signal, the receiver can send a signal to the core circuitry, which can determine, and possibly record, whether the transmission and receipt were successful. The invention advantageously facilitates efficient testing of unpackaged ICs at the wafer level.
摘要翻译：提供了用于对集成电路（“IC”）进行环回测试的方法和装置。在本发明的一个实施例中，可以通过将IC的无线发射器耦合到IC的无线接收器，在未开封的晶片上测试IC。可以控制IC的核心电路，以使发射机向接收机发送至少一个信号。在接收到至少一个信号时，接收器可以向核心电路发送信号，该信号可以确定并且可能记录发送和接收是否成功。本发明有利地有助于在晶片级别有效测试未封装的IC。

6. 发明授权

US07738904B1 Systems and methods for calibrating power regulated communication circuitry 有权
标题翻译：用于校准功率调节通信电路的系统和方法
公开(公告)号：US07738904B1
公开(公告)日：2010-06-15
申请号：US11437560
申请日：2006-05-19
申请人： George Chien , King Chun Tsai , Sang Won Son , Alireza Shirvani-Mahdavi , Qiong Sun , Leycheoh Lim
发明人： George Chien , King Chun Tsai , Sang Won Son , Alireza Shirvani-Mahdavi , Qiong Sun , Leycheoh Lim
IPC分类号： H04B7/00
CPC分类号： H04W52/52 , H04B17/102 , H04B17/13
摘要： Systems and methods are provided for calibrating the control mechanism in a communication circuit to allow the communication circuit to maintain a desired output power level. The communication circuit includes a variable gain adjustment circuit and a power amplifier, which operate together to provide an output power level. A control circuit controls the variable gain adjustment circuit based on a default gain parameter, a high power threshold, and a low power threshold. A calibration circuit in the control circuit calibrates a default gain parameter to provide a desired output power. A power detector can detect the desired output power level to provide an output power measurement. The calibration circuit calibrates upper and lower power thresholds to provide an acceptable range of power variation around the output power measurement.
摘要翻译：提供了用于校准通信电路中的控制机构以允许通信电路保持期望的输出功率电平的系统和方法。通信电路包括可变增益调整电路和功率放大器，其一起工作以提供输出功率电平。控制电路基于默认增益参数，高功率阈值和低功率阈值来控制可变增益调整电路。控制电路中的校准电路校准默认增益参数以提供期望的输出功率。功率检测器可以检测期望的输出功率电平以提供输出功率测量。校准电路校准上限和下限功率阈值，以提供输出功率测量周围功率变化范围的可接受范围。

7. 发明授权

US07339434B1 Linear-in-dB variable gain amplifier using geometric ladder circuit 有权
标题翻译：使用几何梯形电路的线性dB可变增益放大器
公开(公告)号：US07339434B1
公开(公告)日：2008-03-04
申请号：US11394561
申请日：2006-03-31
申请人： Alireza Shirvani-Mahdavi , George Chien
发明人： Alireza Shirvani-Mahdavi , George Chien
IPC分类号： H03G3/12
CPC分类号： H03G1/0088 , H03G7/005
摘要： A variable gain amplifier uses a geometric ladder circuit that produces a transfer function having substantially uniform steps measured in dB. Where the ladder has a plurality of substantially identical resistor rungs of a first resistance, one stile that is a conductor connecting the rungs, and another having a series of substantially identical resistors of a second resistance, then for identical inputs at different rungs, the output signal at an end of the ladder is attenuated by a number of substantially equal steps, one for each rung between input and output. For a ladder with a base rung R, an output at an end opposite the base rung, stile resistors of resistance αR, and other rungs all of resistance (1+(1/α))R, the step size is 20 log10(1+α). By using such ladders in op-amp feedback loops, chaining different stages with different values of α, coarse and fine gain adjustment can be provided.
摘要翻译：可变增益放大器使用几何梯形电路，其产生具有以dB为单位测量的基本均匀步长的传递函数。在梯子具有多个基本上相同的第一电阻电阻器梯级的情况下，一个是连接梯级的导体，另一个是具有一系列基本相同的第二电阻的电阻器，然后对于不同级别的相同输入，输出端在梯子末端的信号被衰减许多基本相等的步骤，一个用于输入和输出之间的每个梯级。对于具有基础梯级R的梯子，与基座梯级相反的一端的输出端，电阻αR的阻尼电阻器和其他梯级的所有电阻（1+（1 /α））R，步长为20log _{10（1 +α）。通过在运算放大器反馈回路中使用这样的梯形图，可以提供不同阶段的不同的α，粗和细增益调整值。}

8. 发明授权

US07330064B1 Geometric ladder circuit with linear-in-dB transfer function 有权
标题翻译：具有线性dB传递函数的几何梯形电路
公开(公告)号：US07330064B1
公开(公告)日：2008-02-12
申请号：US11394586
申请日：2006-03-31
申请人： Alireza Shirvani-Mahdavi , George Chien
发明人： Alireza Shirvani-Mahdavi , George Chien
IPC分类号： G06F7/56
CPC分类号： H03M1/664 , H03M1/785
摘要： A geometric ladder circuit produces a transfer function having substantially uniform steps measured in dB. Where the ladder has a plurality of substantially identical resistor rungs of a first resistance, one stile that is a conductor connecting the rungs, and another having a series of substantially identical resistors of a second resistance, then for identical currents injected at different rungs, the output signal at an end of the ladder is attenuated by a number of substantially equal steps, one for each rung between input and output. For a ladder with a base rung R, an output at an end opposite the base rung, stile resistors of resistance αR, and other rungs all of resistance (1+(1/α))R, the step size is 20 log10 (1+α).
摘要翻译：几何梯形电路产生具有以dB为单位测量的基本均匀步长的传递函数。在梯子具有多个基本相同的第一电阻的电阻器梯级的情况下，一个是连接梯级的导体，另一个是具有一系列基本相同的第二电阻的电阻器，然后对于在不同梯级上注入的相同的电流，在梯形结束处的输出信号被衰减了大量相等的步骤，一个用于输入和输出之间的每个梯级。对于具有基础梯级R的梯子，与基座梯级相反的一端的输出端，电阻αR的阻尼电阻器和其他梯级的所有电阻（1+（1 /α））R，步长为20log _{10（1 +α）。}

9. 发明授权

US08755463B2 Receiving and transmitting signals across non-contiguous channels in a communication system 有权
标题翻译：在通信系统中的不连续信道上接收和发送信号
公开(公告)号：US08755463B2
公开(公告)日：2014-06-17
申请号：US13277925
申请日：2011-10-20
申请人： Alireza Shirvani-Mahdavi
发明人： Alireza Shirvani-Mahdavi
IPC分类号： H03K9/00
CPC分类号： H04B1/0007 , H04B1/28
摘要： Embodiments for processing signals are disclosed. In one embodiment, a method includes receiving signals from at least two non-contiguous channels, where the at least two non-contiguous channels are within a predetermined bandwidth, and where each of the at least two non-contiguous channels has a center frequency. The method also includes utilizing an average of the center frequencies of the at least two non-contiguous channels to down convert the at least two non-contiguous channels to a combined intermediate frequency (IF) channel that has a center frequency that is an average of a difference between the center frequencies of the at least two non-contiguous channels. The method also includes down converting the combined IF channel to a combined channel at a baseband frequency. The method also includes recovering the at least two non-contiguous channels from the combined channel at a baseband frequency utilizing an upper sideband and lower sideband recovery mechanism.
摘要翻译：公开了处理信号的实施例。在一个实施例中，一种方法包括从至少两个不连续信道接收信号，其中至少两个不连续信道在预定带宽内，并且其中至少两个不连续信道中的每一个具有中心频率。该方法还包括利用至少两个不连续信道的中心频率的平均值将至少两个不连续信道下变频到组合中频（IF）信道，其中心频率是所述至少两个不连续通道的中心频率之间的差异。该方法还包括以基带频率将组合的IF信道下变频到组合信道。该方法还包括利用上边带和下边带恢复机制以基带频率从组合信道恢复至少两个不连续的信道。

10. 发明授权

US07733076B1 Dual reference current generation using a single external reference resistor 失效
标题翻译：使用单个外部参考电阻的双参考电流产生
公开(公告)号：US07733076B1
公开(公告)日：2010-06-08
申请号：US11028990
申请日：2005-01-03
申请人： Alireza Shirvani-Mahdavi , George Chien , Yuan-Ju Chao
发明人： Alireza Shirvani-Mahdavi , George Chien , Yuan-Ju Chao
IPC分类号： G05F3/26
CPC分类号： G05F1/561
摘要： Circuits and methods are provided for generating reference currents. In one implementation, a circuit is provided that includes a first source and a current control circuit in communication with the first source. The first source generates a first reference current that is a ratio of a first reference voltage and an external resistance. The current control circuit produces a second reference current that is a ratio of a second reference voltage and the external resistance. The current control circuit produces the second reference current without being directly coupled to the external resistance.
摘要翻译：提供电路和方法用于产生参考电流。在一个实现中，提供了一种电路，其包括与第一源通信的第一源和电流控制电路。第一源产生作为第一参考电压和外部电阻的比率的第一参考电流。电流控制电路产生作为第二参考电压和外部电阻的比率的第二参考电流。电流控制电路产生第二参考电流而不直接耦合到外部电阻。

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