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1. 发明授权

US07414555B1 Interleaved ADC and folded mixer for WLAN devices 有权
标题翻译：用于WLAN设备的交错ADC和折叠混频器
公开(公告)号：US07414555B1
公开(公告)日：2008-08-19
申请号：US11531677
申请日：2006-09-13
申请人： Lalitkumar Nathawad , David J. Weber , Masoud Zargari
发明人： Lalitkumar Nathawad , David J. Weber , Masoud Zargari
IPC分类号： H03M1/00
CPC分类号： H03M1/1215
摘要： An interleaved ADC can advantageously provide synchronous sampling and time-multiplexed output. Differential I and Q input signals can first be stored by charging a plurality of capacitors. These stored differential signals can be buffered in a time-multiplexed sequence. For example, buffering can include transferring voltages stored by a first set of capacitors at a first time and then transferring voltages stored by a second set of capacitors at a second time. Advantageously, this time-multiplexing allow the ADC to be significantly smaller than conventional implementations of two-input ADCs. A folded mixer with gain control is also provided. This mixer can include a first stage having a first set of inductors and a plurality of first type transistors and a second stage having a second set of inductors and a plurality of second type transistors. The plurality of second type transistors in the second stage, which are in a folded configuration, can be driven by the first set of inductors in the first stage. The outputs of the mixer are positioned between the plurality of second type transistors and the second set of inductors. This configuration advantageously permits the mixer to use a low operating voltage.
摘要翻译：交错ADC可以有利地提供同步采样和时间复用输出。可以通过对多个电容器充电来首先存储差分I和Q输入信号。这些存储的差分信号可以以时间复用顺序被缓冲。例如，缓冲可以包括在第一时间转移由第一组电容器存储的电压，然后在第二时间传送由第二组电容器存储的电压。有利地，该时间复用允许ADC比双输入ADC的传统实现方式显着更小。还提供了具有增益控制的折叠混合器。该混频器可以包括具有第一组电感器和多个第一类型晶体管的第一级和具有第二组电感器和多个第二类型晶体管的第二级。处于折叠构造的第二级中的多个第二类型晶体管可以由第一级中的第一组电感器驱动。混频器的输出位于多个第二类型晶体管和第二组电感器之间。该配置有利地允许混合器使用低工作电压。

2. 发明授权

US06973476B1 System and method for communicating data via a wireless high speed link 有权
标题翻译：用于通过无线高速链路传送数据的系统和方法
公开(公告)号：US06973476B1
公开(公告)日：2005-12-06
申请号：US09523573
申请日：2000-03-10
申请人： Rex A. Naden , Masoud Zargari
发明人： Rex A. Naden , Masoud Zargari
IPC分类号： H04L12/28 , H04L29/06 , H04L29/08 , G06F15/16
CPC分类号： H04L12/66 , H04L29/06 , H04L67/06 , H04L67/12 , H04L67/42 , H04L69/329 , H04W4/00
摘要： A high-speed wireless link communicates data between a central storage system and a mobile remote system. The wireless link further communicates data between two mobile remote systems. Both the central storage system and the mobile remote system include a central processor, a memory, a transceiver, and a means for data output. The high-speed wireless link is established between the transceivers. Data are loaded, processed and stored on the central storage system. The data, including musical data in MP3 format, are automatically downloaded at high transmission speeds from the central storage system to the mobile remote system.
摘要翻译：高速无线链路在中央存储系统和移动远程系统之间传送数据。无线链路进一步在两个移动远程系统之间传送数据。中央存储系统和移动远程系统都包括中央处理器，存储器，收发器和数据输出装置。收发器之间建立了高速无线链路。数据被加载，处理并存储在中央存储系统上。数据，包括MP3格式的音乐数据，以高传输速度自动从中央存储系统下载到移动远程系统。

3. 发明申请

US20050007202A1 Synthesizer with lock detector, lock algorithm, extended range VCO, and a simplified dual modulus divider 审中-公开
标题翻译：具有锁定检测器，锁定算法，扩展范围VCO和简化双模式分频器的合成器
公开(公告)号：US20050007202A1
公开(公告)日：2005-01-13
申请号：US10839779
申请日：2004-05-04
申请人： David Su , Chik Yue , David Weber , Masoud Zargari
发明人： David Su , Chik Yue , David Weber , Masoud Zargari
IPC分类号： H03K23/66 , H03L7/089 , H03L7/095 , H03L7/099 , H03L7/10 , H03L7/183 , H03L7/193 , H03L7/00
CPC分类号： H03L7/099 , H03K23/667 , H03L7/089 , H03L7/095 , H03L7/10 , H03L7/193 , Y10S331/02
摘要： The present invention provides a synthesizer having an efficient lock detect signal generator, an extended range VCO that can operate within any one of a plurality of adjacent characteristic curves defined by a plurality of adjacent regions, and a divide circuit implemented using only a single counter along with a decoder. This allows for a method of operating the synthesizer, methods of establishing or reestablishing a lock condition using the extended range VCO, and a method of designing a plurality of divide circuits which each use the same single counter and each use a different decoder.
摘要翻译：本发明提供一种合成器，其具有有效的锁定检测信号发生器，能够在由多个相邻区域限定的多个相邻特性曲线中的任何一个中操作的扩展范围VCO，以及仅使用单个计数器实现的除法电路与解码器。这允许操作合成器的方法，使用扩展范围VCO建立或重新建立锁定条件的方法，以及设计多个除法电路的方法，每个除法电路使用相同的单个计数器并且每个使用不同的解码器。

4. 发明授权

US06677779B1 Flexible control interface for integrated circuit 有权
标题翻译：灵活的集成电路控制接口
公开(公告)号：US06677779B1
公开(公告)日：2004-01-13
申请号：US10113806
申请日：2002-03-28
申请人： David Kuochieh Su , Masoud Zargari , Lars E. Thon , William J. McFarland
发明人： David Kuochieh Su , Masoud Zargari , Lars E. Thon , William J. McFarland
IPC分类号： H03K19177
CPC分类号： G06F1/22 , G01R31/3167
摘要： A control interface, which includes both master and slave devices, can provide buffering of input data packets, thereby allowing configurations of the integrated circuit to be modified quickly and efficiently. Additionally, the control interface can be sized and configured to receive digital signals from any number of nodes on an integrated circuit, thereby facilitating the testing, lab characterization, and debugging of those nodes. Finally, the control interface can advatageously control the monitoring of analog components on the integrated circuit, thereby significantly reducing the number of pins for such monitoring. The control interface has particular relevance to highly integrated circuits that utilize analog and/or mixed signals.
摘要翻译：包括主设备和从设备的控制接口可以提供输入数据分组的缓冲，从而允许快速且有效地修改集成电路的配置。此外，控制接口的大小和配置可以从集成电路上的任意数量的节点接收数字信号，从而便于这些节点的测试，实验室特征化和调试。最后，控制接口可以对集成电路上的模拟组件进行监控，从而显着减少用于此类监视的引脚数量。控制接口与使用模拟和/或混合信号的高度集成电路特别相关。

5. 发明授权

US06351502B1 RF front-end with multistage stepdown filtering architecture 有权
标题翻译：射频前端具有多级降压滤波架构
公开(公告)号：US06351502B1
公开(公告)日：2002-02-26
申请号：US09483948
申请日：2000-01-13
申请人： Masoud Zargari
发明人： Masoud Zargari
IPC分类号： H04B110
CPC分类号： H04B1/28 , H03D7/1441 , H03D7/1483 , H03D7/165 , H03D2200/0023
摘要： A radio-frequency (RF) front-end is described. In one embodiment, the RF front-end comprises a low noise amplifier (LNA), a first mixer and an I/Q quadrature mixer. The LNA amplifies a received signal at a carrier frequency, the LNA having inductive loads. The first mixer is coupled to the low noise amplifier and mixes an amplified received signal with a first local oscillator (LO) signal to down convert the amplified received signal to an intermediate frequency (IF). The first mixer has inductive loads. The first frequency is related to the carrier frequency such that an image channel associated with the carrier and the LO frequency is outside the bandwidth of the inductive loads of the LNA. The I/Q quadrature mixer stage has a second mixer and a third mixer coupled to the first mixer. The I/Q quadrature mixer converts the amplified received signal at the IF to I and Q signals using a second LO signal related to the first LO signal.
摘要翻译：描述射频（RF）前端。在一个实施例中，RF前端包括低噪声放大器（LNA），第一混频器和I / Q正交混频器。 LNA以载波频率放大接收信号，LNA具有感性负载。第一混频器耦合到低噪声放大器，并将放大的接收信号与第一本地振荡器（LO）信号进行混合，以将放大的接收信号下变频到中频（IF）。第一台混频器具有感性负载。第一频率与载波频率有关，使得与载波相关联的图像信道和LO频率在LNA的感性负载的带宽之外。 I / Q正交混频器级具有耦合到第一混频器的第二混频器和第三混频器。 I / Q正交混频器使用与第一LO信号相关的第二LO信号将IF处的放大的接收信号转换为I和Q信号。

6. 发明授权

US08363757B1 Method and apparatus for eliminating the effects of frequency offsets in a digital communication system 有权
标题翻译：消除数字通信系统中频偏的影响的方法和装置
公开(公告)号：US08363757B1
公开(公告)日：2013-01-29
申请号：US09416098
申请日：1999-10-12
申请人： Teresa H. Meng , David Su , Masoud Zargari
发明人： Teresa H. Meng , David Su , Masoud Zargari
IPC分类号： H04L27/06
CPC分类号： H04L27/148 , H03J7/04 , H04B1/38 , H04L7/033 , H04L27/0014 , H04L2027/0022
摘要： The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.
摘要翻译：本发明旨在通过调整在传输期间使用的频率来消除两个收发机之间频率偏移的影响。在本发明中，提供了在传输期间校正载波频率和采样频率的方法，包括这些方法的数字和模拟实现。接收机确定发射机和接收机之间的相对频率偏移，并且当接收机在返回路径中将其数据发送到原始发射机时，使用该信息来校正该偏移，使得由原始发射机接收的信号在采样中，载波频率锁定与原始发射机的本地频率参考。

7. 发明授权

US06483188B1 Rf integrated circuit layout 有权
标题翻译： Rf集成电路布局
公开(公告)号：US06483188B1
公开(公告)日：2002-11-19
申请号：US09571004
申请日：2000-05-15
申请人： Chik Patrick Yue , Masoud Zargari , David Su
发明人： Chik Patrick Yue , Masoud Zargari , David Su
IPC分类号： H01L27095
CPC分类号： H01L23/66 , H01L23/552 , H01L2223/6688 , H01L2924/0002 , H01L2924/00
摘要： A radio-frequency (RF) integrated circuit is described. In one embodiment, the IC comprises multiple metal layers forming multiple transistors on a non-epitaxial substrate. The transistors are step and mirror symmetric. Also, the RF signal lines are on a top metal layer above all other metal layers and the power and ground planes are on a bottom metal layer below all other metal layers. The top and bottom metal layers are separated by a shield that extends beyond the RF signal lines by a distance that is at least the same distance that the shield is away from the RF lines. Low frequency signals are on signal lines below the top metal layer.
摘要翻译：描述了射频（RF）集成电路。在一个实施例中，IC包括在非外延衬底上形成多个晶体管的多个金属层。晶体管是阶梯式和镜面对称的。此外，RF信号线位于所有其它金属层上的顶部金属层上，并且电源和接地平面位于所有其它金属层下方的底部金属层上。顶部和底部金属层被屏蔽层隔开，该屏蔽件延伸超过RF信号线一段至少与屏蔽层远离RF线路的距离至少相等的距离。低频信号位于顶部金属层下方的信号线上。

8. 发明授权

US06242963B1 Differential mixer with improved linearity 有权
标题翻译：差分混频器具有提高的线性度
公开(公告)号：US06242963B1
公开(公告)日：2001-06-05
申请号：US09392982
申请日：1999-09-09
申请人： David K. Su , Masoud Zargari
发明人： David K. Su , Masoud Zargari
IPC分类号： G06F712
CPC分类号： H03D7/1441 , H03D7/1408 , H03D7/1458 , H03D7/1491 , H03D2200/0043
摘要： A mixing apparatus includes a Gilbert cell connected to a first load and a second load. In one embodiment each load contains transistors that are configured as a diode and a triode, where these circuits are additively combined to achieve substantially linear voltage-current characteristics over a predetermined range. The mixing apparatus takes two pairs of differential inputs and produces a pair of differential outputs. Because of the substantial linearity of the loads, the inputs and outputs of the mixing apparatus are acceptable over a relatively large range of input settings. In other embodiments each load may contain a transistor configured as a triode and a resistor, where these circuits are likewise additively combined to achieve substantially linear voltage-current characteristics over a predetermined range.
摘要翻译：混合装置包括连接到第一负载和第二负载的吉尔伯特电池。在一个实施例中，每个负载包含配置为二极管和三极管的晶体管，其中这些电路被加法组合以在预定范围内实现基本上线性的电压 - 电流特性。混合装置采用两对差分输入，并产生一对差分输出。由于负载的实质线性，混合装置的输入和输出在相对大的输入设置范围内是可以接受的。在其他实施例中，每个负载可以包含配置为三极管和电阻器的晶体管，其中这些电路同样地被加法组合以在预定范围内实现基本上线性的电压 - 电流特性。

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