公开(公告)号：US07206557B2

公开(公告)日：2007-04-17

申请号：US10338198

申请日：2003-01-08

申请人： Turgut Sefket Aytur ,  Nathan Belk

发明人： Turgut Sefket Aytur ,  Nathan Belk

IPC分类号： H04B1/04

CPC分类号： H04B1/0475

摘要： A direct conversion transmitter comprising two local oscillators, an in-phase and quadrature modulating signal and in-phase and quadrature modulators, adds a leakage detector and corrective algorithm with one or more digital to analog converters to generate a corrective signal. The corrective signal corrects for, minimizes, and suppresses local oscillator carrier leakage into the transmitted signal. In accordance with the invention, direct up transmitter carrier leakage is automatically measured at regular intervals during the transmit cycle. A DC correction, or a correction waveform as a function of time, is input to both the “in-phase” and “quadrature” modulators at the baseband input. The two correction signals are tuned according to a minimization algorithm to achieve the lowest possible carrier component in the spectral output of the transmitter at its ambient operating conditions and present power output level. As the ambient conditions, such as temperature, and transmitter power level changes, the two correcting input DC currents, or correction waveforms, are further tuned towards the optimal values for that operating condition. Optimization is accomplished by an adaptive feedback technique employed to achieve maximum carrier suppression.

摘要翻译： 包括两个本地振荡器（同相和正交调制信号以及同相和正交调制器）的直接转换发射器将一个泄漏检测器和校正算法与一个或多个数模转换器相加，以产生校正信号。 校正信号校正，最小化和抑制本地振荡器载波泄漏到发射信号中。 根据本发明，在发射周期期间，以规则的间隔自动测量直流发射机载波泄漏。 作为时间的函数的DC校正或校正波形被输入到基带输入处的“同相”和“正交”调制器两者。 根据最小化算法来调整两个校正信号，以在其环境操作条件下实现发射机的频谱输出中最低可能的载波分量，并且提供功率输出电平。 随着诸如温度和发射机功率电平变化的环境条件，两个校正输入DC电流或校正波形进一步被调整到该操作条件的最佳值。 通过用于实现最大载波抑制的自适应反馈技术来实现优化。

公开(公告)号：US07079869B2

公开(公告)日：2006-07-18

申请号：US10365181

申请日：2003-02-12

申请人： Turgut Sefket Aytur ,  Nathan R. Belk

发明人： Turgut Sefket Aytur ,  Nathan R. Belk

IPC分类号： H04M1/00

CPC分类号： H04B1/0458 ,  H01Q1/525 ,  H01Q21/00 ,  H01Q23/00

摘要： A radio frequency (RF) module for use in a communication device of a communication system includes integrated RF circuitry comprising at least one of a transmitter and a receiver, and an antenna element having at least one portion thereof arranged substantially adjacent to and operatively coupled to the integrated RF circuitry. For example, the antenna element may include at least first and second portions having opposing edges arranged immediately adjacent respective first and second sides of the integrated RF circuitry. A plurality of the modules can be used to implement a transceiver in a communication system base station or other communication device.

摘要翻译： 用于通信系统的通信设备的射频（RF）模块包括集成RF电路，其包括发射器和接收器中的至少一个，以及天线元件，其至少一部分被布置成基本上邻近并可操作地耦合到 集成RF电路。 例如，天线元件可以包括至少第一和第二部分，其具有直接邻近集成RF电路的相应第一和第二侧布置的相对边缘。 多个模块可以用于在通信系统基站或其他通信设备中实现收发器。

公开(公告)号：US07095994B1

公开(公告)日：2006-08-22

申请号：US10305584

申请日：2002-11-27

申请人： Turgut Sefket Aytur ,  Nathan R. Belk

发明人： Turgut Sefket Aytur ,  Nathan R. Belk

IPC分类号： H04B1/06 ,  H04L27/08 ,  H03F3/04

CPC分类号： H03F3/50 ,  H03F1/0272 ,  H03F2200/294 ,  H03F2200/372

摘要： Baseband receiver circuitry is dynamically biased in a communication system receiver by generating gain control information, and controlling an adjustable bias of at least a portion of the baseband circuitry based at least in part on the gain control information. The baseband receiver circuitry comprises at least one amplifier having an adjustable bias associated therewith, with the adjustable bias of the amplifier being controllable utilizing a bias control signal. For example, the amplifier may be an operational amplifier having a gain stage and an output buffer stage, with the bias control signal being applied to the output buffer stage to control an adjustable bias current thereof. More specifically, the bias control signal may be used to control an amount of current provided by at least one of a plurality of current sources associated with the output buffer stage of the amplifier, for example, by controlling a switch which enables or disables one or more of the current sources. Advantageously, the dynamic bias control can substantially reduce power consumption in the receiver. The techniques of the invention can also be applied to other types of devices which utilize gain control.

摘要翻译： 基带接收器电路通过产生增益控制信息在通信系统接收器中被动态地偏置，并且至少部分地基于增益控制信息来控制基带电路的至少一部分的可调偏置。 基带接收器电路包括至少一个具有与其相关联的可调偏置的放大器，利用偏置控制信号可控制放大器的可调偏置。 例如，放大器可以是具有增益级和输出缓冲级的运算放大器，其中偏置控制信号被施加到输出缓冲级以控制其可调偏置电流。 更具体地，偏置控制信号可以用于控制由与放大器的输出缓冲级相关联的多个电流源中的至少一个提供的电流量，例如通过控制使能或禁用一个或者 更多的当前来源。 有利地，动态偏置控制可以显着地减少接收机中的功耗。 本发明的技术也可以应用于利用增益控制的其他类型的装置。

公开(公告)号：US6013958A

公开(公告)日：2000-01-11

申请号：US121284

申请日：1998-07-23

申请人： Turgut Sefket Aytur

发明人： Turgut Sefket Aytur

IPC分类号： H01L27/04 ,  H01L21/822 ,  H03J3/18 ,  H02M3/06 ,  H03K17/16

CPC分类号： H03J3/185 ,  H03J2200/10

摘要： Disclosed is an integrated circuit having a plurality of combinations of an integrated unit capacitor connected in series with a controlled channel of an integrated transistor switch. The series-connected capacitor and switch combinations are connected in parallel and the switches include a control gate coupled to a bit output of a register via a control line. In this manner, the capacitance of the variable capacitor depends on what word is stored in the register. Control gates for a different number of capacitor and switch combinations are connected to each bit output, and the numbers are weighted using, e.g., a binary weighting scheme. The variable capacitor is coupled to a balanced signal line pair, with capacitor and switch combinations comprising a switch connected between two capacitors that are connected to a line of the balanced signal line pair. Such arrangement is highly linear and even order distortion is reduced. The disclosed integrated circuit arrangements reduce the sensitivity to noise on the control line of the device. Variations in voltage applied to the control line and thus to the control gate of the switch vary the resistance value of the switch when closed, yet affect the value of the capacitive portion of the impedance very little. The disclosed capacitors are useful in circuits that need to be accurately trimmed once (e.g., filters) and in circuits in which variable capacitance is required, such as voltage controlled oscillators (VCOs).

摘要翻译： 公开了具有与集成晶体管开关的受控通道串联连接的集成单元电容器的多个组合的集成电路。 串联电容器和开关组合并联并且开关包括通过控制线耦合到寄存器的位输出的控制栅极。 以这种方式，可变电容器的电容取决于寄存器中存储的字。 用于不同数量的电容器和开关组合的控制栅极连接到每个位输出，并且使用例如二进制加权方案对数量进行加权。 可变电容器耦合到平衡信号线对，电容器和开关组合包括连接在平衡信号线对的线路上的两个电容器之间的开关。 这种布置是高度线性的，并且偶数阶失真减小。 所公开的集成电路布置降低了对设备的控制线上的噪声的敏感性。 施加到控制线的电压和开关的控制栅极的电压变化在闭合时改变开关的电阻值，但是阻抗的电容部分的值很小。 所公开的电容器在需要精确修整一次（例如滤波器）的电路和需要可变电容的电路（例如压控振荡器（VCO））中是有用的。

公开(公告)号：US20090267676A1

公开(公告)日：2009-10-29

申请号：US12109506

申请日：2008-04-25

申请人： Ren-Chieh Liu ,  Turgut Sefket Aytur

发明人： Ren-Chieh Liu ,  Turgut Sefket Aytur

IPC分类号： G06G7/12

CPC分类号： H03D7/1441 ,  H03D7/1458

摘要： A mixer device includes a differential circuit, a transconductance circuit, and a selecting circuit. The differential circuit receives a differential input signal and generates a differential output signal. The transconductance circuit is coupled to the differential circuit, receives a plurality of radio frequency input signals, and determines to mix at least one of the radio frequency input signals with the differential input signal according to an enable signal. The selecting circuit receives a control signal and generates the enable signal according to the control signal.

摘要翻译： 混频器装置包括差分电路，跨导电路和选择电路。 差分电路接收差分输入信号并产生差分输出信号。 跨导电路耦合到差分电路，接收多个射频输入信号，并且根据使能信号确定将至少一个射频输入信号与差分输入信号混合。 选择电路接收控制信号并根据控制信号产生使能信号。