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    Compact low-power receiver architecture and related method
    71.
    发明授权
    Compact low-power receiver architecture and related method 有权
    紧凑型低功耗接收机架构及相关方法

    公开(公告)号：US08457580B2

    公开(公告)日：2013-06-04

    申请号：US12804399

    申请日：2010-07-20

    申请人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

    发明人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

    IPC分类号： H04B7/00 ,  H04B1/40

    CPC分类号： H04B1/16 ,  H04B1/18 ,  H04B1/30

    摘要： According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain.

    摘要翻译： 根据一个实施例，紧凑型低功率接收机包括产生前端增益的前端和产生后端增益的后端。 前端包括提供数字增益控制和输出放大的接收信号的跨导放大器，用于从放大的接收信号产生下变频信号的混频器，以及包括电流模式缓冲器的跨阻抗放大器（TIA）。 TIA提供用于放大下变频信号以产生前端输出信号的增益控制。 在一个实施例中，后端包括从前端输出信号产生滤波信号的二阶低通滤波器和模数转换器（ADC），其中滤波后的信号被直接馈送到ADC 没有执行直流（DC）偏移消除。 在各种实施例中，前端增益基本上大于后端增益。

    System and method for reduced area tunable capacitors
    72.
    发明授权
    System and method for reduced area tunable capacitors 失效
    减小面积可调电容器的系统和方法

    公开(公告)号：US08446229B2

    公开(公告)日：2013-05-21

    申请号：US12546397

    申请日：2009-08-24

    申请人： Amir Hadji-Abdolhamid ,  Hooman Darabi

    发明人： Amir Hadji-Abdolhamid ,  Hooman Darabi

    IPC分类号： H03H11/00 ,  H01G5/00

    CPC分类号： H03J5/24 ,  H03J2200/10

    摘要： Embodiments of a capacitive tuning system implementing a tunable capacitive array are presented herein. The tunable capacitive array includes both scaled coarse capacitors and one or more fine capacitors. The one or more fine capacitors advantageously reduce a differential nonlinearity associated with the scaled coarse capacitors. The use of fine capacitors limits additional area requirements in an integrated circuit implementation, while improving the accuracy of the capacitive tuning system.

    摘要翻译： 本文给出了实现可调谐电容阵列的电容调谐系统的实施例。 可调电容阵列包括缩放粗略电容器和一个或多个精细电容器。 一个或多个精细电容器有利地降低与缩放的粗糙电容器相关联的差分非线性。 精细电容器的使用在集成电路实现中限制了额外的面积要求，同时提高了电容调谐系统的精度。

    Polar-based RF receiver
    73.
    发明授权
    Polar-based RF receiver 有权
    极地射频接收机

    公开(公告)号：US08369807B2

    公开(公告)日：2013-02-05

    申请号：US13159873

    申请日：2011-06-14

    申请人： Mohyee Mikhemar ,  Hooman Darabi

    发明人： Mohyee Mikhemar ,  Hooman Darabi

    IPC分类号： G06F3/033 ,  H04B1/16 ,  H03D1/24

    CPC分类号： H04B1/38

    摘要： A receiver includes a frequency translation bandpass filter (FTBPF) and an RF receiver section. The RF receiver section includes an amplifier section, a phase information detection module, an amplitude information detection module, and analog to digital conversion (ADC) modules. The FTBPF is operable to filter an inbound radio frequency (RF) signal to produce a filtered inbound RF signal. The amplifier section is operable to amplify the filtered inbound RF signal to produce an amplified inbound RF signal. The phase information detection module, when enabled, is operable to determine phase information from the amplified inbound RF signal. The amplitude information detection module, when enabled, is operable to determine amplitude information from the amplified inbound RF signal. A first one of the ADCs is operable to convert the phase information into digital phase information and a second one of the ADCs is operable to convert the amplitude information into digital amplitude information.

    摘要翻译： 接收机包括频率转换带通滤波器（FTBPF）和RF接收机部分。 RF接收器部分包括放大器部分，相位信息检测模块，振幅信息检测模块和模数转换（ADC）模块。 FTBPF可操作以对入站射频（RF）信号进行滤波，以产生滤波的入站RF信号。 放大器部分可操作以放大经滤波的入站RF信号以产生放大的入站RF信号。 相位信息检测模块在使能时可操作以从放大的入站RF信号确定相位信息。 振幅信息检测模块在被使能时可用于根据放大的入站RF信号确定振幅信息。 ADC中的第一个可操作以将相位信息转换为数字相位信息，并且第二ADC可用于将幅度信息转换为数字幅度信息。

    Peak detector having extended dynamic range
    75.
    发明授权
    Peak detector having extended dynamic range 有权
    峰值检测器具有扩展的动态范围

    公开(公告)号：US08325848B2

    公开(公告)日：2012-12-04

    申请号：US12804319

    申请日：2010-07-19

    申请人： Ahmad Mirzaei ,  Hooman Darabi

    发明人： Ahmad Mirzaei ,  Hooman Darabi

    IPC分类号： H04L27/00

    CPC分类号： H03K5/1532 ,  G01R21/01 ,  H03G3/3042 ,  H04B1/04

    摘要： According to one embodiment, a peak detector having extended dynamic range comprises a first differential output coupled to a supply voltage of the peak detector by a first load and coupled to ground by first and second switching devices, and a second differential output coupled to the supply voltage by a second load and coupled to ground by third and fourth switching devices. The control terminals of the first, second, third, and fourth switching devices receive a common bias voltage, and the respective first and second control terminals are configured as differential inputs of the peak detector. In some embodiments, corresponding first power terminals of the first and second switching devices share a first common node further shared by the first differential output, and corresponding first power terminals of the third and fourth switching devices share a second common node further shared by the second differential output.

    摘要翻译： 根据一个实施例，具有扩展动态范围的峰值检测器包括第一差分输出，其通过第一负载耦合到峰值检测器的电源电压，并由第一和第二开关器件耦合到地，以及耦合到电源的第二差分输出 电压由第二负载耦合并由第三和第四开关装置耦合到地。 第一，第二，第三和第四开关器件的控制端子接收公共偏置电压，并且相应的第一和第二控制端子被配置为峰值检测器的差分输入。 在一些实施例中，第一和第二开关器件的对应的第一电源端子共享由第一差分输出进一步共享的第一公共节点，并且第三和第四开关器件的对应的第一电源端子共享第二公共节点， 差分输出。

    RF transmitter with stable on-chip PLL
    76.
    发明授权
    RF transmitter with stable on-chip PLL 有权
    RF发射机具有稳定的片上PLL

    公开(公告)号：US08280322B2

    公开(公告)日：2012-10-02

    申请号：US12702198

    申请日：2010-02-08

    申请人： Alireza Zolfaghari ,  Hooman Darabi

    发明人： Alireza Zolfaghari ,  Hooman Darabi

    IPC分类号： H03C3/00 ,  H04B1/68

    CPC分类号： H03L7/093 ,  H03L7/0891 ,  H03L7/18

    摘要： A phase locked loop (PLL) a phase detector, a charge pump, a loop filter, a controlled oscillator, and a feedback divider. The phase detector is coupled to produce a difference signal based on a difference between phase of a reference oscillation and phase of a feedback oscillation. The charge pump is coupled to convert the difference signal into an up-signal or a down signal. The loop filter coupled to filter the up signal or the down signal to produce a control signal. The controlled oscillator is coupled to generate an output oscillation based on the control signal. The feedback divider is coupled to generate the feedback oscillation from the output oscillation based on a divider value. The loop filter includes a first resistor-capacitor circuit and a second resistor-capacitor circuit. The first resistor-capacitor circuit is calibrated using a first calibration technique and the second resistor-capacitor circuit is calibrated using a second calibration technique.

    摘要翻译： 锁相环（PLL），相位检测器，电荷泵，环路滤波器，受控振荡器和反馈分压器。 相位检测器被耦合以基于参考振荡的相位与反馈振荡的相位之间的差产生差分信号。 电荷泵被耦合以将差信号转换成上信号或下信号。 该滤波器被耦合以对上行信号或下降信号进行滤波以产生控制信号。 受控振荡器被耦合以基于控制信号产生输出振荡。 反馈分压器被耦合以基于分频器值从输出振荡产生反馈振荡。 环路滤波器包括第一电阻 - 电容电路和第二电阻 - 电容电路。 使用第一校准技术校准第一电阻器电容器电路，并且使用第二校准技术校准第二电阻器电容器电路。

    Method and system for transmitter linearization
    77.
    发明授权
    Method and system for transmitter linearization 失效
    发射机线性化的方法和系统

    公开(公告)号：US08237507B1

    公开(公告)日：2012-08-07

    申请号：US13047444

    申请日：2011-03-14

    申请人： Ahmad Mirzaei ,  Hooman Darabi

    发明人： Ahmad Mirzaei ,  Hooman Darabi

    IPC分类号： H03F3/04

    CPC分类号： H03F1/3205 ,  H03F1/3211 ,  H03F3/211 ,  H03F3/45179 ,  H03F3/72 ,  H03F2200/357 ,  H03F2203/45541 ,  H03F2203/7236

    摘要： Aspects of a method and system for transmitter linearization are provided. A signal may be amplified via one or more circuits comprising a first transistor having a first bias voltage applied to its gate via a resistor, and a second transistor having its source coupled to a first terminal of the resistor, its drain coupled to a second terminal of the resistor, and its gate coupled to a second bias voltage. The signal may be AC-coupled, via one or more capacitors, for example, to the gate of the first transistor. The first bias voltage and the second bias voltage may be such that the first transistor operates in the active region the second transistor operates in the subthreshold region. The effective channel width of the second transistor may be configurable during operation of the one or more circuits.

    摘要翻译： 提供发射机线性化的方法和系统的方面。 信号可以经由一个或多个电路被放大，该电路包括经由电阻器施加到其栅极的第一偏置电压的第一晶体管，以及其源极耦合到电阻器的第一端子的第二晶体管，其漏极耦合到第二端子 并且其栅极耦合到第二偏置电压。 信号可以经由一个或多个电容器例如AC耦合到第一晶体管的栅极。 第一偏置电压和第二偏置电压可以使得第一晶体管在有源区域中工作，第二晶体管在亚阈值区域中工作。 在一个或多个电路的操作期间，第二晶体管的有效沟道宽度可以是可配置的。

    RF front-end with on-chip transmitter/receiver isolation and noise-matched LNA
    78.
    发明授权
    RF front-end with on-chip transmitter/receiver isolation and noise-matched LNA 有权
    RF前端具有片上发射机/接收机隔离和噪声匹配LNA

    公开(公告)号：US08208865B2

    公开(公告)日：2012-06-26

    申请号：US12567071

    申请日：2009-09-25

    申请人： Mohyee Mikhemar ,  Hooman Darabi

    发明人： Mohyee Mikhemar ,  Hooman Darabi

    IPC分类号： H04B1/38

    CPC分类号： H04B1/525 ,  H04B1/18

    摘要： Embodiments of an RF front-end are presented herein. In an embodiment, the RF front end comprises a power amplifier (PA), a noise-matched low-noise amplifier (LNA), a balance network, and a four-port isolation module. A first port of the isolation module is coupled to an antenna. The second port of the isolation module is coupled to the balancing network. The third port is coupled an output of the PA. The fourth port is coupled to a differential input of the noise-matched LNA. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating the LNA coupled to the fourth port. Isolation is achieved via electrical balance. In an embodiment, the signal path coupling the antenna at the first port to the differential input of the LNA at the fourth port is shorter than a wavelength of the inbound signal received by the antenna.

    摘要翻译： 这里呈现RF前端的实施例。 在一个实施例中，RF前端包括功率放大器（PA），噪声匹配低噪声放大器（LNA），平衡网络和四端口隔离模块。 隔离模块的第一端口耦合到天线。 隔离模块的第二个端口耦合到平衡网络。 第三个端口耦合PA的输出。 第四端口耦合到噪声匹配LNA的差分输入。 隔离模块有效地将第三端口与第四端口隔离，以防止在第三端口处接收的强大的出站信号使连接到第四端口的LNA饱和。 通过电气平衡实现隔离。 在一个实施例中，将第一端口处的天线耦合到第四端口处的LNA的差分输入的信号路径比由天线接收的入站信号的波长短。

    Receive band selection and electrostatic discharge protection in a transceiver
    80.
    发明申请
    Receive band selection and electrostatic discharge protection in a transceiver 有权
    在收发器中接收频段选择和静电放电保护

    公开(公告)号：US20120040632A1

    公开(公告)日：2012-02-16

    申请号：US12806500

    申请日：2010-08-13

    申请人： Mohyee Mikhemar ,  Hooman Darabi

    发明人： Mohyee Mikhemar ,  Hooman Darabi

    IPC分类号： H04B1/16 ,  H02H9/04

    CPC分类号： H04B1/18 ,  H01L23/60 ,  H01L2924/0002 ,  H01L2924/00

    摘要： According to one embodiment, an input control unit to provide isolation and electrostatic discharge (ESD) protection for a circuit in an RF transceiver comprises a switching device coupled between an input of the circuit and ground. The switching device is configured to provide ESD protection while the circuit is activated. The switching device is further configured to ground the input while the circuit is non-activated, thereby concurrently isolating the input and providing ESD protection. A method for providing isolation and ESD protection for a circuit in an RF transceiver comprises activating the circuit, providing ESD protection while the circuit is activated, deactivating the circuit, and coupling an input of the circuit to ground, thereby concurrently isolating the input and providing ESD protection while the circuit is non-activated. The method and switching device can be used to provide isolation and ESD protection to receive bands in the RF transceiver.

    摘要翻译： 根据一个实施例，为RF收发器中的电路提供隔离和静电放电（ESD）保护的输入控制单元包括耦合在电路的输入和地之间的开关装置。 开关器件被配置为在电路被激活时提供ESD保护。 开关装置还被配置为在电路未被激活的同时对输入进行接地，从而同时隔离输入并提供ESD保护。 用于为RF收发器中的电路提供隔离和ESD保护的方法包括激活电路，在电路被激活时提供ESD保护，使电路失活，以及将电路的输入耦合到地，从而同时隔离输入并提供 电路未激活时的ESD保护。 该方法和开关装置可用于提供隔离和ESD保护以在RF收发器中接收频带。