利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

17 条记录 (耗时 0.019 秒)

    Duty cycle correction
    1.
    发明授权
    Duty cycle correction 有权
    占空比校正

    公开(公告)号：US08384457B2

    公开(公告)日：2013-02-26

    申请号：US13081315

    申请日：2011-04-06

    申请人： Mehmet T. Ozgun ,  Chi Zhang ,  See Taur Lee

    发明人： Mehmet T. Ozgun ,  Chi Zhang ,  See Taur Lee

    IPC分类号： H03K3/017 ,  H03K5/04 ,  H03K7/08

    CPC分类号： H03K5/1565

    摘要： Method and circuitry for controlling duty cycle of an input signal towards a desired value comprising a sequence of at least two inverters arranged in series and feedback circuitry. A first inverter is arranged to receive the input signal and a last inverter is arranged to output a signal having the same frequency as the input signal. The output signal is an adjusted version of the input signal. The feedback circuitry is arranged to receive the output signal and comprises a comparing and supplying means. The comparing means compares the output signal with a reference signal indicative of a desired value and generates a feedback signal based on the comparison of the output and reference signal. The supplying means supplies the feedback signal to adjust operating conditions of at least one of the inverters, such that the duty cycle of the output signal is controlled towards the desired value.

    摘要翻译： 用于将输入信号的占空比控制到期望值的方法和电路，包括串联布置的至少两个反相器的序列和反馈电路。 第一反相器被布置成接收输入信号，并且最后一个反相器被布置成输出具有与输入信号相同频率的信号。 输出信号是输入信号的调整版本。 反馈电路被布置成接收输出信号并且包括比较和提供装置。 比较装置将输出信号与表示期望值的参考信号进行比较，并且基于输出和参考信号的比较产生反馈信号。 供应装置提供反馈信号以调整至少一个逆变器的操作条件，使得输出信号的占空比被控制到期望值。

    DUTY CYCLE CORRECTION
    2.
    发明申请
    DUTY CYCLE CORRECTION 有权
    占空比校正

    公开(公告)号：US20120256669A1

    公开(公告)日：2012-10-11

    申请号：US13081315

    申请日：2011-04-06

    申请人： Mehmet T. Ozgun ,  Chi Zhang ,  See Taur Lee

    发明人： Mehmet T. Ozgun ,  Chi Zhang ,  See Taur Lee

    IPC分类号： H03K3/017

    CPC分类号： H03K5/1565

    摘要： Method and circuitry for controlling duty cycle of an input signal towards a desired value comprising a sequence of at least two inverters arranged in series and feedback circuitry. A first inverter is arranged to receive the input signal and a last inverter is arranged to output a signal having the same frequency as the input signal. The output signal is an adjusted version of the input signal. The feedback circuitry is arranged to receive the output signal and comprises a comparing and supplying means. The comparing means compares the output signal with a reference signal indicative of a desired value and generates a feedback signal based on the comparison of the output and reference signal. The supplying means supplies the feedback signal to adjust operating conditions of at least one of the inverters, such that the duty cycle of the output signal is controlled towards the desired value.

    摘要翻译： 用于将输入信号的占空比控制到期望值的方法和电路，包括串联布置的至少两个反相器的序列和反馈电路。 第一反相器被布置成接收输入信号，并且最后一个反相器被布置成输出具有与输入信号相同频率的信号。 输出信号是输入信号的调整版本。 反馈电路被布置成接收输出信号并且包括比较和提供装置。 比较装置将输出信号与表示期望值的参考信号进行比较，并且基于输出和参考信号的比较产生反馈信号。 供应装置提供反馈信号以调整至少一个逆变器的操作条件，使得输出信号的占空比被控制到期望值。

    INTEGRATED POWER AMPLIFIER
    5.
    发明申请
    INTEGRATED POWER AMPLIFIER 有权

    公开(公告)号：US20100271131A1

    公开(公告)日：2010-10-28

    申请号：US12830898

    申请日：2010-07-06

    申请人： Robert Bogdan Staszewski ,  See Taur Lee

    发明人： Robert Bogdan Staszewski ,  See Taur Lee

    IPC分类号： H03F3/45 ,  H03F3/16

    CPC分类号： H03F3/189 ,  H03F3/211 ,  H03F3/602 ,  H03F2200/541

    摘要： Methods to implement low cost, high efficiency, low loss power combiner with novel matching circuits are disclosed. A narrow band power combiner enables a high power and high efficiency radio frequency power amplifier to be realized using multiple low voltage CMOS transistors or micro power amplifiers. The power combiner may be printed on a package substrate and realized either using single layer substrate through edge coupling or multiple layers substrate through broadside coupling. The micro power amplifiers may be fabricated using low voltage CMOS technology and electrical connections between the outputs from the micro power amplifiers and the power combiner may be provided through stud bumps in a flip chip technology. With the tunable matching circuits, the present invention allows the narrow band power combiner to be tuned to different frequencies.

    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。

    Driver circuit and a mixer circuit receiving a signal from the driver circuit
    8.
    发明授权
    Driver circuit and a mixer circuit receiving a signal from the driver circuit 有权
    驱动器电路和从驱动器电路接收信号的混频器电路

    公开(公告)号：US08493136B2

    公开(公告)日：2013-07-23

    申请号：US13083188

    申请日：2011-04-08

    申请人： Abdellatif Bellaouar ,  See Taur Lee

    发明人： Abdellatif Bellaouar ,  See Taur Lee

    IPC分类号： G05F1/10

    CPC分类号： H03F3/505 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0074

    摘要： A driver circuit for supplying a drive signal to a mixer circuit comprising a first and second circuit branch and an operational amplifier. The first circuit branch receives an input signal and a bias signal. The second circuit branch receives the input signal. The operational amplifier has a first input connected to a junction node of the first circuit branch and a second input connected to a junction node of the second circuit branch. The operational amplifier is arranged to provide an operational amplifier output signal a second component of the second circuit branch so that a voltage at the junction node of the second circuit branch is equal to a voltage at the junction node of the first circuit branch. The voltage is dependent on the input signal and providing the drive signal.

    摘要翻译： 一种驱动电路，用于将驱动信号提供给包括第一和第二电路支路和运算放大器的混频器电路。 第一电路支路接收输入信号和偏置信号。 第二电路支路接收输入信号。 运算放大器具有连接到第一电路支路的结节点的第一输入端和连接到第二电路支路的结节点的第二输入端。 运算放大器被布置成提供运算放大器输出信号第二电路分支的第二分量，使得第二电路分支的结节点处的电压等于第一电路分支的结节点处的电压。 电压取决于输入信号并提供驱动信号。

    LOCAL OSCILLATOR CLOCK SIGNALS
    9.
    发明申请
    LOCAL OSCILLATOR CLOCK SIGNALS 审中-公开
    本地振荡器时钟信号

    公开(公告)号：US20120268190A1

    公开(公告)日：2012-10-25

    申请号：US13089832

    申请日：2011-04-19

    申请人： Abdellatif Bellaouar ,  See Taur Lee

    发明人： Abdellatif Bellaouar ,  See Taur Lee

    IPC分类号： G06G7/12

    CPC分类号： H03D7/1466 ,  H03D7/1441 ,  H03D2200/0043 ,  H03D2200/0088 ,  H03K5/151

    摘要： An apparatus and method for generating complementary periodic signals for a mixer circuit is provided. The apparatus comprises first and second generation circuits each for generating a periodic signal with a transition time on each rising edge different than a transition time on each falling edge. Each of the first and second generation circuits has an output for supplying its periodic signal to a mixer such that each rising edge of a periodic signal from one of the circuits crosses each falling edge of a periodic signal from the other of the circuits at a crossing point below a turn on voltage of the mixer.

    摘要翻译： 提供了一种用于产生用于混频器电路的互补周期信号的装置和方法。 该装置包括第一和第二生成电路，每个电路用于产生周期信号，每个上升沿上的转换时间与每个下降沿上的转换时间不同。 第一和第二代电路中的每一个具有用于将其周期性信号提供给混频器的输出，使得来自其中一个电路的周期信号的每个上升沿在交叉处与来自另一个电路的周期信号的每个下降沿交叉 低于混频器的开启电压。

    MIXER CIRCUIT
    10.
    发明申请
    MIXER CIRCUIT 有权
    混频器电路

    公开(公告)号：US20120256676A1

    公开(公告)日：2012-10-11

    申请号：US13083188

    申请日：2011-04-08

    申请人： Abdellatif Bellaouar ,  See Taur Lee

    发明人： Abdellatif Bellaouar ,  See Taur Lee

    IPC分类号： G06G7/12 ,  H03K3/00

    CPC分类号： H03F3/505 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0074

    摘要： A driver circuit for supplying a drive signal to a mixer circuit comprising a first and second circuit branch and an operational amplifier. The first circuit branch receives an input signal and a bias signal. The second circuit branch receives the input signal. The operational amplifier has a first input connected to a junction node of the first circuit branch and a second input connected to a junction node of the second circuit branch. The operational amplifier is arranged to provide an operational amplifier output signal a second component of the second circuit branch so that a voltage at the junction node of the second circuit branch is equal to a voltage at the junction node of the first circuit branch. The voltage is dependent on the input signal and providing the drive signal.

    摘要翻译： 一种驱动电路，用于将驱动信号提供给包括第一和第二电路支路和运算放大器的混频器电路。 第一电路支路接收输入信号和偏置信号。 第二电路支路接收输入信号。 运算放大器具有连接到第一电路支路的结节点的第一输入端和连接到第二电路支路的结节点的第二输入端。 运算放大器被布置成提供运算放大器输出信号第二电路分支的第二分量，使得第二电路分支的结节点处的电压等于第一电路分支的结节点处的电压。 电压取决于输入信号并提供驱动信号。