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    CURRENT CONTROLLED BIASING FOR CURRENT-STEERING BASED RF VARIABLE GAIN AMPLIFIERS
    2.
    发明申请
    CURRENT CONTROLLED BIASING FOR CURRENT-STEERING BASED RF VARIABLE GAIN AMPLIFIERS 有权
    基于电流转换的RF可变增益放大器的电流控制偏置

    公开(公告)号：US20100093291A1

    公开(公告)日：2010-04-15

    申请号：US12520513

    申请日：2007-12-20

    申请人： Sherif H.K. Embabi ,  Abdellatif Bellaouar ,  Michel J.G.J.P. Frechette

    发明人： Sherif H.K. Embabi ,  Abdellatif Bellaouar ,  Michel J.G.J.P. Frechette

    IPC分类号： H04B1/04

    CPC分类号： H03G3/3042 ,  H03G1/04

    摘要： An adaptive current control circuit for reduced power consumption and minimized gain shift in a variable gain amplifier. An automatic gain control circuit provides gain control voltages in response to a gain control signal. The gain control voltages are used by the variable gain amplifier to set the gain of the output signal for wireless transmit operations. The adaptive current control circuit receives the same gain control voltages for reducing current to the variable gain amplifier during low gain operation, while providing higher currents during high gain operation. The current that is provided is a hybrid mix of proportional to absolute temperature (PTAT) current and complementary to absolute temperature (CTAT) current for minimizing temperature effects on the gain. The ratio of PTAT current and CTAT current is adjustable for specific temperature ranges to further minimize temperature effects on the gain.

    摘要翻译： 一种自适应电流控制电路，用于降低可变增益放大器的功耗和最小化增益偏移。 自动增益控制电路响应增益控制信号提供增益控制电压。 可变增益放大器使用增益控制电压来设置无线发射操作的输出信号的增益。 自适应电流控制电路在低增益操作期间接收相同的增益控制电压，以减小电流到可变增益放大器，同时在高增益操作期间提供更高的电流。 提供的电流是与绝对温度（PTAT）电流成比例和与绝对温度（CTAT）电流互补的混合混合，以最小化对增益的温度影响。 PTAT电流和CTAT电流的比例可针对特定温度范围进行调节，以进一步降低温度对增益的影响。

    Low supply regulator having a high power supply rejection ratio
    4.
    发明授权
    Low supply regulator having a high power supply rejection ratio 有权
    低电源调节器具有高电源抑制比

    公开(公告)号：US08669754B2

    公开(公告)日：2014-03-11

    申请号：US13081239

    申请日：2011-04-06

    申请人： Abdellatif Bellaouar ,  Arul Balasubramaniyan ,  Solti Peng

    发明人： Abdellatif Bellaouar ,  Arul Balasubramaniyan ,  Solti Peng

    IPC分类号： G05F3/16

    CPC分类号： H04B15/06

    摘要： A power supply noise rejection circuit for functional circuits, such as a voltage controlled oscillator (VCO). The power supply noise rejection circuit includes an isolation transistor connected to a voltage supply for providing an output current and voltage substantially free of noise across the full frequency range. A current source, a diode connected reference transistor with resistance means connected between its gate and drain terminals, and a dummy circuit serially connected between the voltage supply and ground generate a bias voltage that is applied to the gate of the isolation transistor. The dummy circuit mimics the DC characteristics of the functional circuit such that the output current tracks with process and temperature variations. The isolation transistor and the reference transistor can have negative threshold voltages, and the circuit can include bleed means for drawing current from the gate of the reference transistor and isolation transistor.

    摘要翻译： 用于诸如压控振荡器（VCO）的功能电路的电源噪声抑制电路。 电源噪声抑制电路包括连接到电压源的隔离晶体管，用于在整个频率范围内提供基本上没有噪声的输出电流和电压。 电流源，二极管连接的参考晶体管，其电阻装置连接在其栅极和漏极端子之间，并且串联连接在电压源和地之间的虚拟电路产生施加到隔离晶体管的栅极的偏置电压。 虚拟电路模拟功能电路的DC特性，使得输出电流跟踪过程和温度变化。 隔离晶体管和参考晶体管可以具有负阈值电压，并且该电路可以包括用于从参考晶体管和隔离晶体管的栅极引出电流的放电装置。

    Wireless communication system with variable intermediate frequency transmitter
    5.
    发明授权
    Wireless communication system with variable intermediate frequency transmitter 有权
    具有可变中频发射机的无线通信系统

    公开(公告)号：US07359684B2

    公开(公告)日：2008-04-15

    申请号：US10012869

    申请日：2001-11-06

    申请人： Abdellatif Bellaouar ,  Jeff D. Laster ,  Charles Gore

    发明人： Abdellatif Bellaouar ,  Jeff D. Laster ,  Charles Gore

    IPC分类号： H04B1/04 ,  H04B1/40 ,  H04B1/02 ,  H04M1/00

    CPC分类号： H04B1/26 ,  H04B1/0475 ,  H04B2001/0491

    摘要： A wireless communication device (UST), comprising an input for receiving baseband data (I, Q) in a first signal having a first frequency. The device also comprises circuitry (681, 682) for increasing the first frequency, to form a second signal having a second frequency, in response to a first frequency reference signal (IF2), and the device comprises circuitry (74) for increasing the second frequency, to form a third signal having a third frequency, in response to a second frequency reference signal (LO2). Lastly, the device comprises an antenna (ATU2) for transmitting the baseband data at a final transmission frequency selected as a band within a predetermined set of frequency bands. With reference to the preceding, the first frequency reference signal and the second frequency reference signal are variable and are selected in response to the final transmission frequency which is a particular band selected as a different band at different times and from the predetermined set of frequency bands.

    摘要翻译： 一种无线通信设备（UST），包括用于在具有第一频率的第一信号中接收基带数据（I，Q）的输入。 该装置还包括用于增加第一频率的电路（68 1，68 2 2），以响应于第一频率参考信号形成具有第二频率的第二信号 （IF 2 2），并且该装置包括用于响应于第二频率参考信号（LO 2）而增加第二频率以形成具有第三频率的第三信号的电路（74） ）。 最后，该设备包括用于以选定为预定频带组内的频带的最终传输频率发送基带数据的天线（ATU 2）。 参考前述，第一频率参考信号和第二频率参考信号是可变的，并且是响应于作为在不同时间被选择为不同频带的特定频带的最终发射频率和从预定频带组中​​选择的 。

    Digital detection of blockers for wireless receiver
    6.
    发明申请
    Digital detection of blockers for wireless receiver 有权
    无线接收机阻塞器的数字检测

    公开(公告)号：US20060055579A1

    公开(公告)日：2006-03-16

    申请号：US11203717

    申请日：2005-08-15

    申请人： Paul Fontaine ,  Ahmed Mohieldin ,  Pascal Audinot ,  Abdellatif Bellaouar ,  Mikael Guenais

    发明人： Paul Fontaine ,  Ahmed Mohieldin ,  Pascal Audinot ,  Abdellatif Bellaouar ,  Mikael Guenais

    IPC分类号： H03M1/12

    CPC分类号： H03M3/36 ,  H03M3/486 ,  H03M3/49

    摘要： A receiver 100 is provided. The receiver 100 comprises an in-phase analog-to-digital converter 112 operable to detect a saturation condition of the in-phase analog-to-digital converter 112 and to adjust the amplitude of a in-phase signal processed by the in-phase analog-to-digital converter 112 to remove the in-phase analog-to-digital converter 112 from the saturation condition and a in-phase digital filter 114 operable to adjust a gain applied to a digital input to the in-phase digital filter 114 from the in-phase analog-to-digital converter 112, the adjustment of the gain substantially inversely proportional to the adjustment of the amplitude of the in-phase signal processed by the in-phase analog-to-digital converter 112. In an embodiment, the receiver 100 also comprises a quadrature path that is substantially similar to the in-phase path, and the in-phase path and the quadrature path comprise a direct conversion receiver. In an embodiment, the in-phase analog-to-digital converter 112 and the in-phase digital filter 114 comprise an intermediate frequency receiver.

    摘要翻译： 提供接收器100。 接收器100包括同相模拟数字转换器112，其可操作以检测同相模数转换器112的饱和状态，并调整由同相模数转换器112处理的同相信号的振幅 模数转换器112以从饱和状态除去同相模数转换器112;以及同相数字滤波器114，其可操作以调整施加到同相数字滤波器114的数字输入的增益 来自同相模数转换器112的增益基本上与由同相模数转换器112处理的同相信号的振幅的调整成反比地成比例。在一个实施例中 接收器100还包括基本上类似于同相路径的正交路径，并且同相路径和正交路径包括直接转换接收器。 在一个实施例中，同相模数转换器112和同相数字滤波器114包括中频接收器。

    Programmable linear-in-dB or linear bias current source and methods to implement current reduction in a PA driver with built-in current steering VGA
    7.
    发明授权
    Programmable linear-in-dB or linear bias current source and methods to implement current reduction in a PA driver with built-in current steering VGA 有权
    可编程线性dB或线性偏置电流源以及使用内置电流转向VGA实现PA驱动器电流降低的方法

    公开(公告)号：US06985028B2

    公开(公告)日：2006-01-10

    申请号：US10689311

    申请日：2003-10-20

    申请人： See Taur Lee ,  Abdellatif Bellaouar

    发明人： See Taur Lee ,  Abdellatif Bellaouar

    IPC分类号： G05F3/02

    CPC分类号： G05F3/262

    摘要： Programmable linear-in-dB or linear bias current source with respect to an input voltage is provided. The linear-in-dB or linear bias current may be clipped at a minimum current level, a maximum current level, or a combination thereof. Preferably, the minimum and maximum current levels are determined by the use of one or more constant current sources. The constant current sources limit the amount of voltage applied to the gates of one or more transistors, which in turn control the output current. The use of the circuit may be used to generate linear or reverse-linear current levels with respect to an input voltage. The output of the current generator may be used as an input to a power-amplifier driver, for example.

    摘要翻译： 提供了相对于输入电压的可编程线性dB或线性偏置电流源。 线性dB或线性偏置电流可以以最小电流电平，最大电流电平或其组合进行钳位。 优选地，最小和最大电流水平通过使用一个或多个恒定电流源来确定。 恒定电流源限制施加到一个或多个晶体管的栅极的电压的量，其又控制输出电流。 电路的使用可用于相对于输入电压产生线性或反向线性电流水平。 电流发生器的输出可以例如用作功率放大器驱动器的输入。

    Current mode logic gates for low-voltage high-speed applications
    8.
    发明授权
    Current mode logic gates for low-voltage high-speed applications 有权
    低电压高速应用的电流模式逻辑门

    公开(公告)号：US06492840B1

    公开(公告)日：2002-12-10

    申请号：US09669021

    申请日：2000-09-25

    申请人： Abdellatif Bellaouar

    发明人： Abdellatif Bellaouar

    IPC分类号： H03K1700

    CPC分类号： H03K19/086 ,  H03K19/09432

    摘要： A new family of current mode logic (CML) gates (14) which, in one embodiment includes OR/NOR and AND/NAND gates, as well as more complex logic functions. The circuit uses a complementary signal to drive the gate of a feedback transistor (19) which has the effect of pseudo differential operation. Although it uses only single-ended inputs (A, B), because of this feedback aspect, the circuit has many of the advantages of a differential circuit such as low-voltage operation, higher immunity to noise, and less sensitivity to parasitic elements.

    摘要翻译： 一种新的电流模式逻辑（CML）门（14），其在一个实施例中包括OR / NOR和AND / NAND门，以及更复杂的逻辑功能。 该电路使用互补信号来驱动具有伪差动作用的反馈晶体管（19）的栅极。 尽管它仅使用单端输入（A，B），由于这种反馈方面，该电路具有差分电路的许多优点，例如低电压操作，较高的抗噪声能力和较小的对寄生元件的灵敏度。

    Single-to-differential low noise amplifier
    9.
    发明授权
    Single-to-differential low noise amplifier 有权
    单差分低噪声放大器

    公开(公告)号：US06366171B1

    公开(公告)日：2002-04-02

    申请号：US09544101

    申请日：2000-04-06

    申请人： Petteri M. Litmanen ,  Abdellatif Bellaouar

    发明人： Petteri M. Litmanen ,  Abdellatif Bellaouar

    IPC分类号： H03F345

    CPC分类号： H03F3/4508 ,  H03F1/22 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45316 ,  H03F2203/45394

    摘要： The present invention relates to a single-to-differential signal transformation circuit which comprises a differential signal generation circuit which is operable to receive a single-ended signal and generate a pair of differential signals having a phase relationship associated therewith. The transformation circuit further comprises a phase analysis circuit operably coupled to the differential signal generation circuit which is operable to ascertain the phase relationship between the differential signals and generate a status indication associated therewith. In addition, a compensation circuit is operably coupled to the phase analysis circuit and is operable to alter a function of the transformation circuit based on the status indication from the phase analysis circuit such that the altered function causes the phase relationship of the differential signals which form a circuit output to be closer to 180 degrees than an initial phase relationship generated by the differential signal generation circuit. In such a manner, improved differential signal phase balance is achieved.

    摘要翻译： 本发明涉及一种单差分信号变换电路，它包括差分信号产生电路，该差分信号产生电路可操作以接收单端信号并产生一对具有相关关系的差分信号。 变换电路还包括可操作地耦合到差分信号产生电路的相位分析电路，其可操作以确定差分信号之间的相位关系并且生成与其相关联的状态指示。 此外，补偿电路可操作地耦合到相位分析电路，并且可操作以基于来自相位分析电路的状态指示来改变变换电路的功能，使得改变的功能导致形成的差分信号的相位关系 电路输出比由差分信号发生电路产生的初始相位关系更接近180度。 以这种方式，实现了改进的差分信号相位平衡。