公开(公告)号：US07612684B2

公开(公告)日：2009-11-03

申请号：US11767223

申请日：2007-06-22

申请人： Issy Kipnis ,  Daniel Bjork ,  Jan Rapp

发明人： Issy Kipnis ,  Daniel Bjork ,  Jan Rapp

IPC分类号： G08B23/00

CPC分类号： H03F3/19 ,  H03F1/30 ,  H03F3/602

摘要： Briefly, in accordance with one or more embodiments, a dual mode power amplifier is capable of operating in either linear mode such as class A operation, or a non-linear mode such as class F operation. The power amplifier may be utilized in an RFID interrogator. The power amplifier may be biased to operate in a linear mode if the power amplifier is operating in a higher linearity mode, or may be biased to operate in a non-linear mode if the power amplifier is operating in a higher efficiency, lower power mode. The power amplifier may comprise two or more amplifiers coupled in parallel. A current mirror circuit may turn on more amplifiers if the power amplifier is operating in a higher power mode, and may turn on fewer amplifiers if the power amplifier is operating a lower power mode.

摘要翻译： 简而言之，根据一个或多个实施例，双模功率放大器能够以诸如A类操作的线性模式或诸如F类操作之类的非线性模式操作。 功率放大器可以用在RFID询问器中。 如果功率放大器工作在更高的线性模式，则功率放大器可以被偏置以工作在线性模式，或者如果功率放大器以较高效率，较低功率模式工作，则该偏置可工作在非线性模式 。 功率放大器可以包括并联耦合的两个或更多个放大器。 如果功率放大器在较高功率模式下工作，则电流镜电路可能导通更多的放大器，如果功率放大器工作在较低功率模式，则可能导通更少的放大器。

公开(公告)号：US07742751B2

公开(公告)日：2010-06-22

申请号：US11613986

申请日：2006-12-20

申请人： Scott Chiu ,  Issy Kipnis ,  Jan Rapp ,  David Westberg

发明人： Scott Chiu ,  Issy Kipnis ,  Jan Rapp ,  David Westberg

IPC分类号： H04B1/26

CPC分类号： H04B1/30

摘要： Provided are a method, system, and device directed to a receive path for a node in a communication system such as a Radio Frequency Identification (RFID) system. In one aspect, the receive path includes a filter operable in multiple modes and configurable to have different bandwidths in the various modes of operation. For example, in one mode, the filter samples a DC component while configured to have a relatively wide bandwidth. As another example, the filter may be operated in another mode to hold the sampled DC component while the filter is configured to have a zero or close to zero bandwidth. As yet another example, the filter may be operated in still another mode to filter received signals and cancel the sampled DC offset from the received signals while configured to have a relatively narrow bandwidth. Additional embodiments are described and claimed.

摘要翻译： 提供了一种针对诸如射频识别（RFID）系统的通信系统中的节点的接收路径的方法，系统和设备。 在一个方面，接收路径包括可在多种模式下操作并可配置为在各种操作模式中具有不同带宽的滤波器。 例如，在一种模式中，滤波器对DC分量进行采样，同时配置为具有相对较宽的带宽。 作为另一示例，滤波器可以在另一模式下操作以保持采样的DC分量，同时滤波器被配置为具有零或接近零带宽。 作为另一示例，滤波器可以在另一模式下操作以对接收到的信号进行滤波，并且在被配置为具有相对窄的带宽的同时从接收到的信号中取消采样的DC偏移。 描述和要求保护附加的实施例。

公开(公告)号：US20090003487A1

公开(公告)日：2009-01-01

申请号：US11771374

申请日：2007-06-29

申请人： Scott Chiu ,  Marc Loyer ,  Thomas J. Barnes ,  Jan Rapp ,  Jimmy Carlsson

发明人： Scott Chiu ,  Marc Loyer ,  Thomas J. Barnes ,  Jan Rapp ,  Jimmy Carlsson

IPC分类号： H03C1/52

CPC分类号： H03C1/50

摘要： Mechanisms for reducing amplitude-modulated noise in a wireless transceiver are generally described. In one example, an apparatus includes a radio-frequency identification (RFID) transceiver, a digital-analog converter (DAC) coupled with the transceiver, a reconstruction filter coupled with the digital-analog converter, and hold logic associated with the reconstruction filter to enable the reconstruction filter to hold its output voltage.

摘要翻译： 通常描述用于降低无线收发机中的调幅噪声的机制。 在一个示例中，设备包括射频识别（RFID）收发器，与收发器耦合的数模转换器（DAC），与数模转换器耦合的重建滤波器以及与重构滤波器相关联的保持逻辑 使重构滤波器保持其输出电压。

公开(公告)号：US20070004355A1

公开(公告)日：2007-01-04

申请号：US11172235

申请日：2005-06-29

申请人： Issy Kipnis ,  Scott Chiu ,  David Westberg ,  Jan Rapp ,  Jonas Johansson

发明人： Issy Kipnis ,  Scott Chiu ,  David Westberg ,  Jan Rapp ,  Jonas Johansson

IPC分类号： H04B1/18

CPC分类号： H03D3/008 ,  H03D7/166 ,  H04B1/26 ,  H04B1/30

摘要： Apparatus, system, and method for multi-class wireless receiver are described. The multi-class receiver includes a first down-converter coupled to an input port, a filter coupled to the first-down converter, and a second down-converter coupled to the filter. In a first mode, the filter is configured as a first filter and the second down-converter is disabled. In a second mode, the filter is configured as a second filter and the second down converter is enabled. The system includes a wireless module and a wireless transceiver in communication with the wireless module. The method includes receiving multi-class RF signals, converting at least a first class of RF signals in a first mode of operation, and converting at least a second class of RF signals in a second mode of operation with said multi-class receiver.

摘要翻译： 描述了用于多类无线接收机的装置，系统和方法。 多级接收机包括耦合到输入端口的第一下变频器，耦合到第一下变频器的滤波器和耦合到滤波器的第二下变频器。 在第一模式中，滤波器被配置为第一滤波器并且第二下变频器被禁用。 在第二模式中，滤波器被配置为第二滤波器，并且第二下变频器被使能。 该系统包括与无线模块通信的无线模块和无线收发器。 该方法包括接收多类RF信号，在第一操作模式下转换至少第一类RF信号，并且在所述多级接收机中以第二操作模式转换至少第二类RF信号。

公开(公告)号：US20080315993A1

公开(公告)日：2008-12-25

申请号：US11767223

申请日：2007-06-22

申请人： Issy Kipnis ,  Daniel Bjork ,  Jan Rapp

发明人： Issy Kipnis ,  Daniel Bjork ,  Jan Rapp

IPC分类号： H04Q5/22 ,  H03F3/04

CPC分类号： H03F3/19 ,  H03F1/30 ,  H03F3/602

摘要： Briefly, in accordance with one or more embodiments, a dual mode power amplifier is capable of operating in either linear mode such as class A operation, or a non-linear mode such as class F operation. The power amplifier may be utilized in an RFID interrogator. The power amplifier may be biased to operate in a linear mode if the power amplifier is operating in a higher linearity mode, or may be biased to operate in a non-linear mode if the power amplifier is operating in a higher efficiency, lower power mode. The power amplifier may comprise two or more amplifiers coupled in parallel. A current mirror circuit may turn on more amplifiers if the power amplifier is operating in a higher power mode, and may turn on fewer amplifiers if the power amplifier is operating a lower power mode.

摘要翻译： 简而言之，根据一个或多个实施例，双模功率放大器能够以诸如A类操作的线性模式或诸如F类操作之类的非线性模式操作。 功率放大器可以用在RFID询问器中。 如果功率放大器工作在更高的线性模式，则功率放大器可能被偏置为工作在线性模式，或者如果功率放大器以较高效率，较低功率模式工作，则该偏置可工作在非线性模式 。 功率放大器可以包括并联耦合的两个或更多个放大器。 如果功率放大器在较高功率模式下工作，则电流镜电路可能导通更多的放大器，如果功率放大器工作在较低功率模式，则可能导通更少的放大器。

公开(公告)号：US20080150689A1

公开(公告)日：2008-06-26

申请号：US11613986

申请日：2006-12-20

申请人： Scott CHIU ,  Issy KIPNIS ,  Jan RAPP ,  David WESTBERG

发明人： Scott CHIU ,  Issy KIPNIS ,  Jan RAPP ,  David WESTBERG

IPC分类号： H04Q5/22

CPC分类号： H04B1/30

摘要： Provided are a method, system, and device directed to a receive path for a node in a communication system such as a Radio Frequency Identification (RFID) system. In one aspect, the receive path includes a filter operable in multiple modes and configurable to have different bandwidths in the various modes of operation. For example, in one mode, the filter samples a DC component while configured to have a relatively wide bandwidth. As another example, the filter may be operated in another mode to hold the sampled DC component while the filter is configured to have a zero or close to zero bandwidth. As yet another example, the filter may be operated in still another mode to filter received signals and cancel the sampled DC offset from the received signals while configured to have a relatively narrow bandwidth. Additional embodiments are described and claimed.

摘要翻译： 提供了一种针对诸如射频识别（RFID）系统的通信系统中的节点的接收路径的方法，系统和设备。 在一个方面，接收路径包括可在多种模式下操作并可配置为在各种操作模式中具有不同带宽的滤波器。 例如，在一种模式中，滤波器对DC分量进行采样，同时配置为具有相对较宽的带宽。 作为另一示例，滤波器可以在另一模式下操作以保持采样的DC分量，同时滤波器被配置为具有零或接近零带宽。 作为另一示例，滤波器可以在另一模式下操作以对接收到的信号进行滤波，并且在被配置为具有相对窄的带宽的同时从接收到的信号中取消采样的DC偏移。 描述和要求保护附加的实施例。