公开(公告)号：US07482852B1

公开(公告)日：2009-01-27

申请号：US11468723

申请日：2006-08-30

申请人： Hirad Samavati

发明人： Hirad Samavati

IPC分类号： G06G7/12

CPC分类号： H03D7/1441 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2200/005 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03D2200/0047 ,  H03G3/3047

摘要： An N-stage inductor-less local oscillator (LO) buffer can include N−1 non-final stages and a final stage. The final stage can includes a gain circuit, a common-mode feedback circuit connected to the gain circuit, and a replica bias circuit that provides a predetermined voltage to the common-mode feedback circuit. The inductor-less LO buffer can advantageously reduce a power budget for its downstream mixer as well as provide a compact footprint.

摘要翻译： N级无电感器本地振荡器（LO）缓冲器可以包括N-1个非最后级和最后级。 最后一级可以包括增益电路，连接到增益电路的共模反馈电路和向共模反馈电路提供预定电压的复制偏置电路。 无电感LO缓冲器可有利地降低其下游混频器的功率预算，并提供紧凑的占位面积。

公开(公告)号：US08204451B1

公开(公告)日：2012-06-19

申请号：US12182232

申请日：2008-07-30

申请人： Alireza Kheirkhahi ,  Hirad Samavati ,  Srenik Mehta ,  David Su ,  Brian Kaczynski

发明人： Alireza Kheirkhahi ,  Hirad Samavati ,  Srenik Mehta ,  David Su ,  Brian Kaczynski

IPC分类号： H04B1/40

CPC分类号： H03L7/099 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1265 ,  H03B2201/025 ,  H03J2200/10

摘要： A transceiver for use in a wireless device. The transceiver may include a receive portion for receiving an input RF signal. The receive portion may include at least one receive filter which may include a first filter. The transceiver may also include a transmit portion for transmitting an output RF signal. The transmit portion may include at least one transmit filter, which may include the first filter used in the receive portion. The transceiver may further include a plurality of switches, which may include a first switch coupled to an input of the first filter and a second switch coupled to an output of the first filter. The plurality of switches may be configurable to enable use of the first filter in the receive portion for receiving the input RF signal and use of the first filter in the transmit portion for transmitting the output RF signal.

摘要翻译： 用于无线设备的收发器。 收发器可以包括用于接收输入RF信号的接收部分。 接收部分可以包括可以包括第一滤波器的至少一个接收滤波器。 收发器还可以包括用于发送输出RF信号的发送部分。 发射部分可以包括至少一个发射滤波器，其可以包括在接收部分中使用的第一滤波器。 收发器还可以包括多个开关，其可以包括耦合到第一滤波器的输入的第一开关和耦合到第一滤波器的输出的第二开关。 多个开关可以被配置为使得能够使用接收部分中的第一滤波器来接收输入RF信号，并且在发送部分中使用第一滤波器来发送输出RF信号。

公开(公告)号：US6084285A

公开(公告)日：2000-07-04

申请号：US954973

申请日：1997-10-20

申请人： Arvin R. Shahani ,  Thomas H. Lee ,  Hirad Samavati ,  Derek K. Shaeffer ,  Steven Walther

发明人： Arvin R. Shahani ,  Thomas H. Lee ,  Hirad Samavati ,  Derek K. Shaeffer ,  Steven Walther

IPC分类号： H01L27/08 ,  H01L29/41

CPC分类号： H01L27/0805 ,  H01L28/86

摘要： Linear integrated circuit capacitors having greater capacitance per unit area by using lateral flux. One embodiment comprises a two metal layer capacitor wherein each metal layer is comprised of two capacitor conductive components. The capacitor conductive components are cross-coupled so that the total capacitance is the sum of the vertical flux between the metal layers, and the lateral flux along the edges between the two capacitor conductive components in each of the metal layers. The lateral flux between the capacitor conductive components in a single metal layer increases the capacitance per unit area and decreases the bottom-plate parasitic capacitance. Increasing the length of the common edge formed by capacitor conductive components in a metal layer increases the capacitance per unit area. In one lateral flux capacitor, each metal layer is comprised of a plurality of rows, alternate rows are coupled together such that lateral flux is generated between each of the rows. The rows are also cross-coupled with rows in adjacent metal layers to provide vertical flux. Fractal shapes can be used to maximize the length of the perimeter of adjacent capacitor conductive components in a single metal layer. The Koch Islands and Minkowski Sausage families of fractals are particularly well suited for generating capacitor conductive component perimeter shapes. These fractals are generated by selecting an initiator shape and repeatedly applying a generator. The fractal shapes are generated by a computer program based upon user input parameters.

摘要翻译： 线性集成电路电容器通过使用横向通量具有更大的电容单位面积。 一个实施例包括两个金属层电容器，其中每个金属层由两个电容器导电部件组成。 电容器导电部件被交叉耦合，使得总电容是金属层之间的垂直通量和沿着每个金属层中的两个电容器导电部件之间的边缘的横向磁通的总和。 单个金属层中的电容器导电元件之间的横向通量增加了每单位面积的电容，并降低了底板寄生电容。 增加由金属层中的电容器导电部件形成的共同边缘的长度增加了每单位面积的电容。 在一个横向通量电容器中，每个金属层由多个行组成，交替的行耦合在一起，使得在每行之间产生横向通量。 这些行还与相邻金属层中的行交叉耦合以提供垂直通量。 可以使用分形来最大化单个金属层中相邻电容器导电组件的周长的长度。 科赫群岛和明科夫斯基香肠分形系列特别适用于生成电容器导电组件周边形状。 这些分形是通过选择引发器形状并重复应用发生器来生成的。 基于用户输入参数的计算机程序生成分形。

公开(公告)号：US20110181467A1

公开(公告)日：2011-07-28

申请号：US12754521

申请日：2010-04-05

申请人： Hirad Samavati ,  Qiang Lin ,  Qinfang Sun ,  William J. McFarland

发明人： Hirad Samavati ,  Qiang Lin ,  Qinfang Sun ,  William J. McFarland

IPC分类号： G01S19/33 ,  G01S19/37

CPC分类号： G01S19/37 ,  G01S19/33 ,  G01S19/36

摘要： A receiver for receiving both GPS signals and GLONASS signals is provided. This receiver includes an analog front end (AFE), a GPS digital front end (DFE) and a GLONASS DFE for receiving an output of the AFE, and a dual mode interface (DMI) for receiving outputs of the GPS and GLONASS DFEs. Search engines are provided for receiving outputs of the DMI. Notably, certain front-end components of the AFE are configured to process both the GPS signals and the GLONASS signals.

摘要翻译： 提供了用于接收GPS信号和GLONASS信号的接收器。 该接收机包括用于接收AFE的输出的模拟前端（AFE），GPS数字前端（DFE）和GLONASS DFE，以及用于接收GPS和GLONASS DFE的输出的双模式接口（DMI）。 提供搜索引擎用于接收DMI的输出。 值得注意的是，AFE的某些前端组件配置为处理GPS信号和GLONASS信号。

公开(公告)号：US07567142B2

公开(公告)日：2009-07-28

申请号：US11424972

申请日：2006-06-19

申请人： Hirad Samavati

发明人： Hirad Samavati

IPC分类号： H01P5/10 ,  H03H11/32

CPC分类号： H03H7/42

摘要： A quasi-balun circuit for receiving an unbalanced input and providing signals to a balanced-input low noise amplifier (LNA) is provided. Notably, this quasi-balun circuit can provide a phase difference between the positive and the negative terminals of the LNA that is greater than 90 degrees, but less than 180 degrees. In one embodiment, the quasi-balun circuit can provide a phase difference of approximately 135 degrees. To provide this functionality, the quasi-balun circuit includes a passive, reactive network coupled between the unbalanced input and the LNA.

摘要翻译： 提供了一种用于接收不平衡输入并向平衡输入低噪声放大器（LNA）提供信号的准平衡 - 不平衡转换电路。 值得注意的是，该准平衡 - 不平衡转换电路可以在LNA的正极和负极之间提供大于90度但小于180度的相位差。 在一个实施例中，准巴伦电路可以提供大约135度的相位差。 为了提供这种功能，准平衡 - 不平衡转换电路包括耦合在不平衡输入和LNA之间的无源，无功网络。

公开(公告)号：US20060290441A1

公开(公告)日：2006-12-28

申请号：US11424972

申请日：2006-06-19

申请人： Hirad Samavati

发明人： Hirad Samavati

IPC分类号： H03H7/42

CPC分类号： H03H7/42

摘要： A quasi-balun circuit for receiving an unbalanced input and providing signals to a balanced-input low noise amplifier (LNA) is provided. Notably, this quasi-balun circuit can provide a phase difference between the positive and the negative terminals of the LNA that is greater than 90 degrees, but less than 180 degrees. In one embodiment, the quasi-balun circuit can provide a phase difference of approximately 135 degrees. To provide this functionality, the quasi-balun circuit includes a passive, reactive network coupled between the unbalanced input and the LNA.

摘要翻译： 提供了一种用于接收不平衡输入并向平衡输入低噪声放大器（LNA）提供信号的准平衡 - 不平衡转换电路。 值得注意的是，该准平衡 - 不平衡转换电路可以在LNA的正极和负极之间提供大于90度但小于180度的相位差。 在一个实施例中，准巴伦电路可以提供大约135度的相位差。 为了提供这种功能，准平衡 - 不平衡转换器电路包括耦合在不平衡输入和LNA之间的无源，无功网络。

公开(公告)号：US20050258888A1

公开(公告)日：2005-11-24

申请号：US10837534

申请日：2004-04-29

申请人： Hirad Samavati

发明人： Hirad Samavati

IPC分类号： G06F7/44 ,  H03D7/14 ,  H03G1/00 ,  H04B1/40

CPC分类号： H03G1/0088 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/0025 ,  H03D2200/0084 ,  H03G1/0023

摘要： A gain controlled mixer for an integrated CMOS transceiver. Accuracy of the controlled gain may be relatively invariant over temperature, manufacturing process, and other variations attendant to circuit realizations in a CMOS transceiver, and other realizations. A plurality of substantially matched circuit elements are instantiated and disposed similarly within the gain controlled mixer, enhancing the gain accuracy of selectable gain control states. Matching gain and other functions between circuit elements is further enhanced by appropriately controlling DC operating point conditions.

摘要翻译： 集成CMOS收发器的增益控制混频器。 可控增益的精度可能相对于温度，制造过程以及与CMOS收发器中电路实现相关的其他变化以及其他实现相对不变。 多个基本上匹配的电路元件被类似地在增益控制的混频器内被实例化和布置，增强了可选增益控制状态的增益精度。 通过适当控制DC工作点条件，进一步提高电路元件之间的匹配增益和其他功能。

公开(公告)号：US08587477B2

公开(公告)日：2013-11-19

申请号：US12754521

申请日：2010-04-05

申请人： Hirad Samavati ,  Qiang Lin ,  Qinfang Sun ,  William J. McFarland

发明人： Hirad Samavati ,  Qiang Lin ,  Qinfang Sun ,  William J. McFarland

IPC分类号： G01S19/36 ,  G01S19/37

CPC分类号： G01S19/37 ,  G01S19/33 ,  G01S19/36

摘要： A receiver for receiving both GPS signals and GLONASS signals is provided. This receiver includes an analog front end (AFE), a GPS digital front end (DFE) and a GLONASS DFE for receiving an output of the AFE, and a dual mode interface (DMI) for receiving outputs of the GPS and GLONASS DFEs. Search engines are provided for receiving outputs of the DMI. Notably, certain front-end components of the AFE are configured to process both the GPS signals and the GLONASS signals.

摘要翻译： 提供了用于接收GPS信号和GLONASS信号的接收器。 该接收机包括用于接收AFE的输出的模拟前端（AFE），GPS数字前端（DFE）和GLONASS DFE，以及用于接收GPS和GLONASS DFE的输出的双模式接口（DMI）。 提供搜索引擎用于接收DMI的输出。 值得注意的是，AFE的某些前端组件配置为处理GPS信号和GLONASS信号。

公开(公告)号：US07847613B1

公开(公告)日：2010-12-07

申请号：US12204310

申请日：2008-09-04

申请人： Hirad Samavati

发明人： Hirad Samavati

IPC分类号： G06F7/44

CPC分类号： H03L7/099 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1265 ,  H03B2201/025 ,  H03J2200/10

摘要： A variable transconductance device for a mixer apparatus is provided. The apparatus includes at least one variable current source circuit having a plurality of selectively enabled current source stages. Each of the current source stages, when enabled, is actuable to establish a conductive path between a first supply level and an output terminal. The device further includes at least one variable transconductance circuit having a plurality of selectively enabled transconductance stages. Each transconductance stage, when enabled, is actuable to establish a conductive path between a second supply level and the output terminal. An output current signal is generated at the output terminal responsive to actuation of the variable transconductance circuit by an input voltage signal, whereby the output current signal exhibits a power gain adjustably determined responsive to the numbers of current source and transconductance stages selectively enabled.

摘要翻译： 提供了一种用于混合装置的可变跨导装置。 该装置包括至少一个具有多个有选择地使能的电流源级的可变电流源电路。 当使能时，电流源级中的每一个可被致动以在第一电源电平和输出端子之间建立导电路径。 该器件还包括具有多个选择性使能的跨导级的至少一个可变跨导电路。 每个跨导级在使能时可被致动以在第二电源电平和输出端之间建立导电路径。 响应于可变跨导电路由输入电压信号的致动而在输出端产生输出电流信号，由此输出电流信号表现出响应于有选择地使能的电流源极和跨导级的数量可调节地确定的功率增益。

公开(公告)号：US07171184B2

公开(公告)日：2007-01-30

申请号：US10837534

申请日：2004-04-29

申请人： Hirad Samavati

发明人： Hirad Samavati

IPC分类号： H04B1/18

CPC分类号： H03G1/0088 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/0025 ,  H03D2200/0084 ,  H03G1/0023

摘要： A gain controlled mixer for an integrated CMOS transceiver. Accuracy of the controlled gain may be relatively invariant over temperature, manufacturing process, and other variations attendant to circuit realizations in a CMOS transceiver, and other realizations. A plurality of substantially matched circuit elements are instantiated and disposed similarly within the gain controlled mixer, enhancing the gain accuracy of selectable gain control states. Matching gain and other functions between circuit elements is further enhanced by appropriately controlling DC operating point conditions.

摘要翻译： 集成CMOS收发器的增益控制混频器。 可控增益的精度可能相对于温度，制造过程以及与CMOS收发器中电路实现相关的其他变化以及其他实现相对不变。 多个基本上匹配的电路元件被类似地在增益控制的混频器内被实例化和布置，增强了可选增益控制状态的增益精度。 通过适当控制DC工作点条件，进一步提高电路元件之间的匹配增益和其他功能。