公开(公告)号：US20080136498A1

公开(公告)日：2008-06-12

申请号：US11618863

申请日：2006-12-31

申请人： Razieh Roufoogaran ,  Qiang Li ,  Bojko Marholev

发明人： Razieh Roufoogaran ,  Qiang Li ,  Bojko Marholev

IPC分类号： H03K3/01

CPC分类号： H03K5/003 ,  H03K5/02 ,  H04L27/3863

摘要： A method and system for buffering a clock signal is provided. The method may include self-biasing a PMOS transistor of a buffer, utilized for amplifying an in-phase/quadrature phase signal, to produce a first bias voltage at the gate of a PMOS transistor, and biasing an NMOS transistor of the buffer via a controllable current source to produce a second bias voltage at the gate of the NMOS transistor. The gain of the buffer may be controlled by varying a controllable current source coupled to a second NMOS transistor configured as a diode. Two coupling capacitors may be utilized to remove a DC component of the signal. Multiple buffers may be coupled end-to-end to increase the overall drive capability, where the channel width of the transistors within the transistors may be doubled in each successive buffer.

摘要翻译： 提供了一种用于缓冲时钟信号的方法和系统。 该方法可以包括自偏压缓冲器的PMOS晶体管，用于放大同相/正交相位信号，以在PMOS晶体管的栅极处产生第一偏置电压，并经由一个PMOS晶体管偏置缓冲器的NMOS晶体管 可控电流源，以在NMOS晶体管的栅极处产生第二偏置电压。 可以通过改变耦合到配置为二极管的第二NMOS晶体管的可控电流源来控制缓冲器的增益。 可以使用两个耦合电容器来去除信号的DC分量。 多个缓冲器可以端对端耦合以增加总体驱动能力，其中晶体管内的晶体管的沟道宽度可以在每个连续的缓冲器中加倍。

公开(公告)号：US20120112773A1

公开(公告)日：2012-05-10

申请号：US12927240

申请日：2010-11-10

申请人： Alireza Zolfaghari ,  Chin-Ming Chien ,  Bojko Marholev

发明人： Alireza Zolfaghari ,  Chin-Ming Chien ,  Bojko Marholev

IPC分类号： G01R27/26 ,  G01R27/08

CPC分类号： G01R27/2605 ,  G01R27/14 ,  G01R31/2882 ,  G01R31/2884

摘要： According to one disclosed embodiment, an on-chip resistor calibration circuit includes an RC oscillator having a test resistor and a precision capacitor as elements, a counter, and a reference clock. In one embodiment, an RC oscillator generates a waveform having a period dependent upon the resistance of the test resistor and the capacitance of the precision capacitor. In such an embodiment, a counter and a reference clock may be configured to measure the period of the waveform. Using a pre-determined capacitance of the precision capacitor, a resistance of the test resistor may be determined. In another embodiment, an RC oscillator generates first and second waveforms through use of an additional capacitor that can be switched in and out of the RC oscillator circuit. Using a pre-determined capacitance of the precision capacitor, an RC product of the test resistor and the additional capacitor may be determined.

摘要翻译： 根据一个公开的实施例，片上电阻校准电路包括具有测试电阻器和精密电容器作为元件的RC振荡器，计数器和参考时钟。 在一个实施例中，RC振荡器产生具有取决于测试电阻器的电阻和精密电容器的电容的周期的波形。 在这种实施例中，计数器和参考时钟可被配置为测量波形的周期。 使用精密电容器的预定电容，可以确定测试电阻器的电阻。 在另一个实施例中，RC振荡器通过使用可以进入和离开RC振荡器电路的附加电容器产生第一和第二波形。 使用精密电容器的预定电容，可以确定测试电阻器的RC乘积和附加电容器。

公开(公告)号：US07974590B2

公开(公告)日：2011-07-05

申请号：US11855217

申请日：2007-09-14

申请人： Brima Babatunde Ibrahim ,  John Walley ,  Bojko Marholev ,  Siukai Mak

发明人： Brima Babatunde Ibrahim ,  John Walley ,  Bojko Marholev ,  Siukai Mak

IPC分类号： H04B1/04

CPC分类号： H03L7/085 ,  H03L7/181

摘要： Aspects of a method and system for simultaneous signal transmission on multiple selected frequencies may include generating from a single baseband signal, a plurality of radio frequency transmission signals each at a different radio frequency, wherein the single baseband signal comprises an in-phase signal component and/or a quadrature signal component. The single baseband signal, to generate said plurality of radio frequency transmission signals, may be modulated in a single radio frequency transmission chain, the radio frequency transmission chain comprising intermediate frequency modulation and radio frequency modulation. The plurality of radio frequency transmission signals may be a radio frequency signal and a corresponding image frequency signal, based on the intermediate frequency modulation and the radio frequency modulation. The signals resulting from the intermediate frequency modulation and the radio frequency modulation may be filtered to preserve the radio frequency signal and the corresponding image frequency signal.

摘要翻译： 用于在多个选定频率上同时进行信号传输的方法和系统的方面可以包括：从单个基带信号生成各自在不同射频上的多个射频传输信号，其中单个基带信号包括同相信号分量， /或正交信号分量。 用于产生所述多个射频传输信号的单基带信号可以在单个射频传输链中进行调制，射频传输链包括中频调制和射频调制。 多个射频发送信号可以是基于中频调制和射频调制的射频信号和对应的图像频率信号。 可以对由中频调制和射频调制产生的信号进行滤波以保持射频信号和对应的图像频率信号。

公开(公告)号：US20090302966A1

公开(公告)日：2009-12-10

申请号：US12133637

申请日：2008-06-05

申请人： Brima Ibrahim ,  Alireza Zofaghari ,  Steven Hall ,  Kambiz Shoarinejad ,  Bojko Marholev

发明人： Brima Ibrahim ,  Alireza Zofaghari ,  Steven Hall ,  Kambiz Shoarinejad ,  Bojko Marholev

IPC分类号： H04B15/00

CPC分类号： H04B1/1036 ,  H04B1/30

摘要： Methods and systems for optimal frequency planning for an integrated communication system with multiple receivers may include adjusting a center frequency of a low IF signal to reduce interference by a second order interference signal. The center frequency may be adjusted to avoid high power portions of the second order interference signal. The interference level corresponding to a center frequency may be determined by, for example, a SNR of the low IF signal, or by determining a BER for the low IF signal. The center frequency of the low IF signal may be dynamically adjusted to keep second order interference level at an acceptable level. Adjusting the center frequency of the low IF signal may also comprise keeping the low IF signal from being blocked by a DC component of the second order interference signal.

摘要翻译： 用于具有多个接收机的集成通信系统的最佳频率规划的方法和系统可以包括调整低IF信号的中心频率以减少二阶干扰信号的干扰。 可以调整中心频率以避免二阶干扰信号的高功率部分。 对应于中心频率的干扰电平可以通过例如低IF信号的SNR或通过确定低IF信号的BER来确定。 可以动态地调整低IF信号的中心频率以将二阶干扰电平保持在可接受的水平。 调整低IF信号的中心频率还可以包括保持低IF信号被二阶干扰信号的DC分量阻挡。

公开(公告)号：US20090191828A1

公开(公告)日：2009-07-30

申请号：US12418448

申请日：2009-04-03

申请人： Brima Ibrahim ,  Bojko Marholev ,  Lijun Zhang

发明人： Brima Ibrahim ,  Bojko Marholev ,  Lijun Zhang

IPC分类号： H04B1/18

CPC分类号： H04H20/61 ,  H03J1/0008 ,  H04H20/71 ,  Y02D70/14

摘要： A system for processing signals is disclosed and may include a single chip having an integrated Bluetooth radio and an integrated FM radio. The single chip may include at least one processor that enables selecting from a range of FM channels, a particular frequency for one of the FM channels based on an intermediate frequency (IF). The particular frequency may be selected so that it is an integer multiple of a channel spacing between neighboring allocated FM channels within the range of FM channels, and may be offset by at most one-half the channel spacing. The at least one processor may enable determining a frequency error of the selected particular frequency for the one of the FM channels. The at least one processor may also enable determining, whether the particular frequency includes an on-frequency channel based on the determined frequency error.

摘要翻译： 公开了用于处理信号的系统，并且可以包括具有集成的蓝牙无线电和集成FM无线电的单个芯片。 单芯片可以包括至少一个处理器，其能够从FM频道的范围中选择基于中频（IF）的FM频道之一的特定频率。 可以选择特定频率，使得它是在FM信道范围内的相邻分配的FM频道之间的信道间隔的整数倍，并且可以偏移最多一半的信道间隔。 所述至少一个处理器可以使得能够确定所述FM频道之一的所选择的特定频率的频率误差。 所述至少一个处理器还可以使得能够基于所确定的频率误差来确定特定频率是否包括频率信道。

公开(公告)号：US20090124200A1

公开(公告)日：2009-05-14

申请号：US11939171

申请日：2007-11-13

申请人： Steven Deane Hall ,  Brima Babatunde Ibrahim ,  Hea Joung Kim ,  Yuan Zhuang ,  Langford Wasada ,  Bojko Marholev ,  Shawn Ding ,  Latha Caliaperoumal ,  Satya Prasad Srinivas

发明人： Steven Deane Hall ,  Brima Babatunde Ibrahim ,  Hea Joung Kim ,  Yuan Zhuang ,  Langford Wasada ,  Bojko Marholev ,  Shawn Ding ,  Latha Caliaperoumal ,  Satya Prasad Srinivas

IPC分类号： H04B7/00

CPC分类号： H04W8/005 ,  H04W16/14 ,  H04W48/16

摘要： Methods and systems for wireless communication are disclosed and may include controlling one or more scans of a received signal detection frequency across a frequency range and storing a magnitude of the received signal at each frequency where the magnitude exceeds a threshold level. A type of one or more signals in the received signal may be determined based on a bandwidth of the signals. A Bluetooth page/inquiry scan may be initiated if the determined type is a page/inquiry signal, and scans may be continued if the determined type may not be a page/inquiry signal. The scans may be repeated on a periodic basis and may be controlled utilizing a voltage controlled oscillator. Each of the scans may include a plurality of discrete frequency steps or a continuous frequency ramp. The controlling may include a start frequency, an end frequency and a frequency step size for the scans.

摘要翻译： 公开了用于无线通信的方法和系统，并且可以包括控制跨越频率范围的接收信号检测频率的一次或多次扫描并且在幅度超过阈值水平的每个频率处存储接收信号的幅度。 可以基于信号的带宽来确定接收信号中的一种或多种信号的类型。 如果确定的类型是页面/查询信号，则可以启动蓝牙页面/查询扫描，并且如果所确定的类型可能不是页面/查询信号，则可以继续扫描。 可以周期性地重复扫描，并且可以利用压控振荡器来控制扫描。 每个扫描可以包括多个离散频率步长或连续频率斜坡。 控制可以包括扫描的起始频率，结束频率和频率步长。

公开(公告)号：US20080233954A1

公开(公告)日：2008-09-25

申请号：US11832858

申请日：2007-08-02

申请人： Brima Ibrahim ,  John Walley ,  Scott Bibaud ,  Bojko Marholev ,  Prasan Pai ,  Siukai Mak ,  Asif Grushkevich

发明人： Brima Ibrahim ,  John Walley ,  Scott Bibaud ,  Bojko Marholev ,  Prasan Pai ,  Siukai Mak ,  Asif Grushkevich

IPC分类号： H04Q7/20

CPC分类号： H03L7/085 ,  H03L7/181

摘要： A method and system is provided for enabling communication, where a FM radio system including an integrated FM radio transmitter and FM radio receiver may use an in-band FM or out of band transmitter to communicate a dynamically generated list with alternate local FM channels to an in-band or out of band receiver of another FM radio device with a FM radio receiver. The generated list of local FM channels may be ranked according to the least neighboring channel interference and may be selected for tuning the FM radio device. The FM radio system and the FM radio device may both scan to generate a substantially matched list of local FM channels. In response to detecting a new signal of a transmitted channel by the FM radio system, the FM radio device may tune to the same channel using an open loop, closed loop or semi-open loop method.

摘要翻译： 提供了一种用于实现通信的方法和系统，其中包括集成FM无线电发射机和FM无线电接收机的FM无线电系统可以使用带内FM或带外发射机将动态生成的列表与备用的本地FM频道通信到 具有FM收音机的另一FM无线电设备的带内或带外接收机。 所生成的本地FM频道列表可以根据最小邻近信道干扰进行排序，并且可以选择用于调谐FM无线电设备。 FM无线电系统和FM无线电设备都可以扫描以产生基本匹配的本地FM频道列表。 响应于通过FM无线电系统检测到传输信道的新信号，FM无线电设备可以使用开环，闭环或半开环方法调谐到相同信道。

公开(公告)号：US20080139151A1

公开(公告)日：2008-06-12

申请号：US11622551

申请日：2007-01-12

申请人： Adedayo Ojo ,  Bojko Marholev ,  Shahla Khorram

发明人： Adedayo Ojo ,  Bojko Marholev ,  Shahla Khorram

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H04B1/406 ,  H04W88/06 ,  Y02D70/122 ,  Y02D70/124

摘要： Aspects of a method and system for sharing low noise amplifier (LNA) circuitry in a single chip Bluetooth and wireless local area network (WLAN) system are disclosed. Aspects of the system may comprise a chip with integrated WLAN and Bluetooth radios. RF signals may be received via a single antenna coupled to a shared LNA integrated in chip. When WLAN signals are received they are communicated from the shared LNA to a subsequent amplification stage integrated within the WLAN radio. When Bluetooth signals are received they are communicated from the shared LNA to a subsequent amplification stage that comprises a transconductance amplifier integrated within the WLAN radio and an LNA load integrated within the Bluetooth radio. Gains in the LNAs, the transconductance amplifier, and/or the subsequent WLAN amplification stage may be dynamically adjusted. Outputs from the subsequent amplification stages may be communicated to mixers for further processing.

摘要翻译： 公开了在单芯片蓝牙和无线局域网（WLAN）系统中共享低噪声放大器（LNA）电路的方法和系统的方面。 该系统的方面可以包括具有集成的WLAN和蓝牙无线电的芯片。 可以经由耦合到集成在芯片中的共享LNA的单个天线来接收RF信号。 当接收到WLAN信号时，它们从共享LNA传送到集成在WLAN无线电中的后续放大级。 当接收到蓝牙信号时，它们从共享的LNA传送到后续的放大级，其包括集成在WLAN无线电内的跨导放大器和集成在蓝牙无线电内的LNA负载。 可以动态地调整LNA，跨导放大器和/或随后的WLAN放大级中的增益。 来自后续放大级的输出可以传送到混合器用于进一步处理。

公开(公告)号：US07215199B2

公开(公告)日：2007-05-08

申请号：US11155157

申请日：2005-06-17

申请人： Bojko Marholev

发明人： Bojko Marholev

IPC分类号： H03F3/45

CPC分类号： H03F3/45659 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45418 ,  H03F2203/45424

摘要： A method for simplifying common mode feedback circuitry utilized in multi-stage operational amplifiers may comprise generating a first differential output signal by a first amplifying circuit in an amplifying stage and communicating the first differential output signal to a first output of the amplifying stage. A second amplifying circuit in the amplifying stage may generate a second differential output signal that may be communicated to a second output of the amplifying stage. The second differential output signal may be fed back to a first feedback circuit in the amplifying stage, and the first differential output signal may be fed back to a second feedback circuit in the amplifying stage. Additionally, the first and the second differential output signals may be fed back to the second feedback circuit and the first feedback circuit, respectively, in a first amplifying stage and/or any one or more of succeeding amplifying stages.

摘要翻译： 用于简化在多级运算放大器中使用的共模反馈电路的方法可包括由放大级中的第一放大电路产生第一差分输出信号，并将第一差分输出信号传送到放大级的第一输出。 放大级中的第二放大电路可以产生可以被传送到放大级的第二输出的第二差分输出信号。 第二差分输出信号可以反馈到放大级中的第一反馈电路，并且第一差分输出信号可以反馈到放大级中的第二反馈电路。 此外，第一和第二差分输出信号可以分别在第一放大级和/或后续放大级中的任何一个或多个反馈到第二反馈电路和第一反馈电路。

公开(公告)号：US20060128342A1

公开(公告)日：2006-06-15

申请号：US11348893

申请日：2006-02-07

申请人： Bojko Marholev

发明人： Bojko Marholev

IPC分类号： H04B1/10

CPC分类号： H03H11/04 ,  H03H11/0422 ,  H03H11/22 ,  H03H2011/0494 ,  H03L7/08 ,  H03L7/0805 ,  H03L2207/06

摘要： A complex filter such as the channel select filter in a radio transceiver is implemented using a transconductance/C topology to benefit from the ability to tune such filters and thereby stabilize the output transfer function of the filter over variations in temperature, power supply voltage and process. The topology is based on an active R/C biquadratic topology to achieve the additional benefit of independently controlled stages. The problem created by the R in the output impedance is can be overcome by separately tuning the R value along with the transconductance/C ratio, by implementing the R as a transconductance amplifier having common mode feedback, or by implementing the transconductance amplifiers of the topology using Nauta transconductors, and unbalancing the common mode circuit of the Nauta transconductor to achieve a differential resistance that can be used to implement the R in the output impedance.

摘要翻译： 使用跨导/ C拓扑来实现诸如无线电收发器中的通道选择滤波器的复杂滤波器，以从调谐这种滤波器的能力中受益，从而使滤波器的输出传递函数稳定在温度，电源电压和过程的变化上 。 该拓扑结构基于活动的R / C双向拓扑，以实现独立控制级的附加优点。 通过将R作为具有共模反馈的跨导放大器，或通过实现拓扑的跨导放大器，可以通过单独调谐R值与跨导/ C比来克服输出阻抗中产生的问题 使用Nauta跨导体，以及不平衡Nauta跨导体的共模电路，以实现可用于在输出阻抗中实现R的差分电阻。