公开(公告)号：US20110156818A1

公开(公告)日：2011-06-30

申请号：US12649376

申请日：2009-12-30

申请人： Mats Carlsson ,  Daniel Bjork

发明人： Mats Carlsson ,  Daniel Bjork

IPC分类号： H03F1/00

CPC分类号： H03F3/195

摘要： An output-impedance in a power amplifier is provided. A first transistor QBUF of a buffer stage is connected to a first side of a resistor RF and a second transistor QAMP to a second opposite side of the resistor RF. The first transistor feeds a current IRF to the second resistor QAMP. The current IRF at the second transistor is copied and multiplied by a factor (n) to form an output current IOUT, as (1+n)* IRF. The current IRF is fed back to the first transistor and the output current IOUT is fed to a load resistor R.

摘要翻译： 提供功率放大器中的输出阻抗。 缓冲级的第一晶体管QBUF连接到电阻器RF和第二晶体管QAMP的第一侧到电阻器RF的第二相对侧。 第一晶体管将电流IRF馈送到第二电阻器QAMP。 将第二晶体管上的当前IRF复制并乘以因子（n）以形成输出电流IOUT作为（1 + n）* IRF。 电流IRF反馈到第一晶体管，输出电流IOUT被馈送到负载电阻R.

公开(公告)号：US08018284B2

公开(公告)日：2011-09-13

申请号：US12649376

申请日：2009-12-30

申请人： Mats Carlsson ,  Daniel Bjork

发明人： Mats Carlsson ,  Daniel Bjork

IPC分类号： H03F3/16

CPC分类号： H03F3/195

摘要： An output-impedance in a power amplifier is provided. A first transistor QBUF of a buffer stage is connected to a first side of a resistor RF and a second transistor QAMP to a second opposite side of the resistor RF. The first transistor feeds a current IRF to the second resistor QAMP. The current IRF at the second transistor is copied and multiplied by a factor (n) to form an output current IOUT, as (1+n)*IRF. The current IRF is fed back to the first transistor and the output current IOUT is fed to a load resistor R.

摘要翻译： 提供功率放大器中的输出阻抗。 缓冲级的第一晶体管QBUF连接到电阻器RF和第二晶体管QAMP的第一侧到电阻器RF的第二相对侧。 第一晶体管将电流IRF馈送到第二电阻器QAMP。 将第二晶体管上的当前IRF复制并乘以因子（n）以形成输出电流IOUT作为（1 + n）* IRF。 电流IRF反馈到第一晶体管，输出电流IOUT被馈送到负载电阻R.

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：US20050002469A1

公开(公告)日：2005-01-06

申请号：US10834225

申请日：2004-04-29

申请人： Tommy Oberg ,  Ahmed Hemani ,  Daniel Bjork

发明人： Tommy Oberg ,  Ahmed Hemani ,  Daniel Bjork

IPC分类号： H03F20060101 ,  H03F1/02 ,  H04B1/04 ,  H04K1/00 ,  H04L27/26

CPC分类号： H04B1/0475 ,  H03F1/0222 ,  H03F2200/331 ,  H03F2200/504 ,  H04L27/2626

摘要： This invention relates to an envelope elimination and restoration device having an input terminal for processing an input signal comprising an inphase signal and a quadrature signal. The envelope elimination and restoration device comprises: a signal pre-processing device, which comprises a first path for processing the envelope of said input signal, and a second path for processing the phase of said input signal, said first path comprising a digital envelope extractor receiving said inphase and quadrature signals, and said second path comprising an intermediate frequency upconverter, receiving said input signal, and generating an intermediate frequency signal comprising said inphase and quadrature signals, and a digital clipping unit receiving said intermediate frequency signal; a power control signal source having an input connected to an output of said envelope extractor; a radio frequency upconverter connected to said digital clipping unit; and a power amplifier having an input, which is connected to an output of said radio frequency upconverter, a power control input, which is connected to an output of said power control signal source, and an output.

摘要翻译： 本发明涉及具有用于处理包括同相信号和正交信号的输入信号的输入端的包络消除和恢复装置。 信封消除和恢复装置包括：信号预处理装置，其包括用于处理所述输入信号的包络的第一路径和用于处理所述输入信号的相位的第二路径，所述第一路径包括数字信封提取器 接收所述同相和正交信号，所述第二路径包括中频上变频器，接收所述输入信号，并产生包括所述同相和正交信号的中频信号，以及接收所述中频信号的数字限幅单元; 功率控制信号源，具有连接到所述包络提取器的输出端的输入端; 连接到所述数字裁剪单元的射频上变频器; 以及功率放大器，其具有连接到所述射频上变频器的输出的输入，连接到所述功率控制信号源的输出的功率控制输入和输出。

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：US20070137841A1

公开(公告)日：2007-06-21

申请号：US11343725

申请日：2006-01-31

申请人： Daniel Bjork

发明人： Daniel Bjork

IPC分类号： F28D1/02

CPC分类号： F28F1/126 ,  F28D21/0003 ,  F28D2021/0082 ,  F28F2215/04

摘要： Automotive heat exchanger assemblies that can withstand high environmental temperature and pressures conditions are described. By providing for a strengthened fin in contact with the tubes at the areas of highest stress, the heat exchanger assembly is strengthened to be efficient under actual operating conditions.

摘要翻译： 描述了可承受高环境温度和压力条件的汽车热交换器组件。 通过在最高应力的区域提供与管接触的加强翅片，在实际操作条件下，热交换器组件被加强以有效。