专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2007088363A1 POWER AMPLIFIER WITH DIGITAL PRE-DISTORSION 审中-公开
标题翻译：带数字预失真的功率放大器
公开(公告)号：WO2007088363A1
公开(公告)日：2007-08-09
申请号：PCT/GB2007/000337
申请日：2007-02-01
申请人： FILTRONIC PLC , RHODES, John, David
发明人： RHODES, John, David
IPC分类号： H03F1/32 , H03F3/20
CPC分类号： H03F3/245 , H03F1/301 , H03F1/3205 , H03F1/3241 , H03F1/56 , H03F3/193 , H03F2200/15 , H03F2200/387 , H03F2200/451 , H03F2201/3224
摘要： A power amplifier using a digitally pre-distorted compound semiconductor transistor is discussed. The amplifier has improved linearity. For a given gate bias voltage, there exists a drain voltage at which the drain current is the same for a pulsed signal as for a DC signal and is invariant to quiescent bias points occurring when a pulsed signal is applied. If an amplifier operates at this point, the trapping effects that lead to memory effects do not affect the dynamic behaviour of a digitally pre-distorted amplifier, resulting in improved linearity. The existence of this point, and it' s benefits to the linearity of a digitally pre-distorted amplifier, have not been previously recognised.
摘要翻译：讨论了使用数字预失真化合物半导体晶体管的功率放大器。放大器具有提高的线性度。对于给定的栅极偏置电压，存在漏极电压，对于脉冲信号，漏极电流对于DC信号是相同的，并且对于施加脉冲信号时发生的静态偏置点是不变的。如果此时放大器工作，则导致记忆效应的捕获效应不会影响数字预失真放大器的动态特性，从而提高线性度。这一点的存在，并且它对数字预失真放大器的线性有好处，以前没有被认可。

2. 发明申请

WO2007077409A1 AN ACTIVE LOAD PULL AMPLIFIER 审中-公开
标题翻译：主动负载拉杆放大器
公开(公告)号：WO2007077409A1
公开(公告)日：2007-07-12
申请号：PCT/GB2006/000038
申请日：2006-01-05
申请人： FILTRONIC PLC , RHODES, John, David
发明人： RHODES, John, David
IPC分类号： H03F3/60 , H03F1/02 , H03F1/52
CPC分类号： H03F3/602 , H03F1/0288 , H03F1/52 , H03F2200/315 , H03F2200/541
摘要： An active load pull amplifier for amplifying a signal (V) of fundamental frequency (fo) comprising a main amplifier (2); an auxiliary amplifier (3), a 3dB coupled line coupler (9) comprising first and second inputs and first and second outputs; the outputs from the main (2) and auxiliary (3) amplifiers being connected to the first and second inputs of the coupled line coupler (9) respectively; and the 3dB coupled line coupler (9) being a quarter wavelength coupler at frequency fo.
摘要翻译：一种用于放大包括主放大器（2）的基频（fo）的信号（V）的有源负载拉放放大器; 辅助放大器（3），包括第一和第二输入以及第一和第二输出的3dB耦合线耦合器（9）; 主（2）和辅助（3）放大器的输出分别连接到耦合线耦合器（9）的第一和第二输入端; 并且3dB耦合线耦合器（9）是频率为fo的四分之一波长耦合器。

3. 发明申请

WO2003043181A2 AMPLIFIER 审中-公开
标题翻译：放大器
公开(公告)号：WO2003043181A2
公开(公告)日：2003-05-22
申请号：PCT/GB2002/004870
申请日：2002-10-28
申请人： FILTRONIC PLC , RHODES, John, David
发明人： RHODES, John, David
IPC分类号： H03F
CPC分类号： H03F3/217
摘要： An amplifier comprising a field effect transistor, a terminating network comprising inductors connected in series separated by capacitors connected in parallel, a filter and a load, wherein the values of the capacitors and inductors are arranged to present open circuits to a predetermined number of odd harmonics of a signal frequency being amplified, and to present short circuits to a predetermined number of even harmonics of the signal frequency, wherein the normalised values of the inductors and capacitors of the terminating network are selected using the following procedure: Let g r = C r r odd = L r r even then g 1 = 1, g 1 g 2 = (a); g r g r+1 = (b), r = 2→2m-1 and g 2m g 2m+1 = (c) where (m-1) represents the predetermined number of odd harmonics which are presented with an open circuit.
摘要翻译：一种包括场效应晶体管的放大器，包括串联连接的并联电容器的滤波器和负载串联的电感器的终端网络，其中电容器和电感器的值被布置成将开路提供到预定数量的奇次谐波信号频率被放大，并且将信号频率的预定数量的偶次谐波呈现短路，其中使用以下过程来选择终端网络的电感器和电容器的归一化值：令g> r < C> r r 1 <= 1，g> 1 2 <=（a）; g> r r + 1 <=（b），r = 2} 2m-1和g> 2m gm 2m + 1 <=（c）其中（m-1）表示奇数谐波的预定数量它们呈现开路。

4. 发明申请

WO2007057622A1 AMPLIFIER 审中-公开
标题翻译：放大器
公开(公告)号：WO2007057622A1
公开(公告)日：2007-05-24
申请号：PCT/GB2005/004401
申请日：2005-11-16
申请人： FILTRONIC PLC , RHODES, John, David
发明人： RHODES, John, David
IPC分类号： H03F3/193 , H03F1/32 , H03F1/30 , H03F1/02
CPC分类号： H03F1/301 , H03F1/0261 , H03F1/3241 , H03F3/193
摘要： An amplifier comprising a digitally pre-distorted Laterally Diffused Metal Oxide Semiconductor (LDMOS) transistor and a biassing circuit is described. The gate bias voltage defines an operating point of the LDMOS transistor such that the quiescent drain current of the LDMOS transistor is substantially invariant when an input signal of varying power is applied. The quiescent drain current is the drain current of the at least one LDMOS transistor when the input signal is instantaneously removed. Such an amplifier has reduced intermodulation products in its output for input signals of varying power levels. The intermodulation products are reduced for input signals of less than maximum power as well as maximum power.
摘要翻译：描述了包括数字预失真的侧向扩散金属氧化物半导体（LDMOS）晶体管和偏置电路的放大器。栅极偏置电压定义了LDMOS晶体管的工作点，使得当施加变化的功率的输入信号时，LDMOS晶体管的静态漏极电流基本上是不变的。当输入信号被瞬时去除时，静态漏极电流是至少一个LDMOS晶体管的漏极电流。这种放大器在其输出中减少了具有不同功率电平的输入信号的互调产物。对于小于最大功率和最大功率的输入信号，互调产物被减少。

5. 发明申请

WO2009125195A1 A LINEAR ACTUATOR 审中-公开
标题翻译：线性执行器
公开(公告)号：WO2009125195A1
公开(公告)日：2009-10-15
申请号：PCT/GB2009/000940
申请日：2009-04-09
申请人： ISOTEK ELECTRONICS LIMITED , RHODES, John, David , MOBBS, Christopher, Ian , PANKS, Andrew, James
发明人： RHODES, John, David , MOBBS, Christopher, Ian , PANKS, Andrew, James
IPC分类号： F16H25/20
CPC分类号： F16H25/2009 , F16H25/2003
摘要： A linear actuator comprising a drive arm and an extension arm each extending along a common drive axis; the extension arm being at least partially received in a housing, the housing allowing displacement of the extension arm along the drive axis but preventing rotation of the extension arm around the drive axis; one of the arms having a plurality of resiliently deformable fingers extending beyond the end of the arm towards the other arm, at least one of the fingers having a thread on its inner face; the other arm having a threaded portion, at least part of the threaded portion being received between the fingers; the fingers being adapted to urge the threads of the two arms into interengagement such that rotation of the drive arm about the drive axis displaces the extension arm along the drive axis; characterised in that the two threads are arranged such that when the ridge of one thread is received in the groove of the other thread the two sides of the ridge abut the two edges of the mouth of the groove.
摘要翻译：一种线性致动器，包括驱动臂和延伸臂，每个延伸臂沿公共驱动轴线延伸; 所述延伸臂至少部分地容纳在壳体中，所述壳体允许所述延伸臂沿着所述驱动轴线移位，但是防止所述延伸臂围绕所述驱动轴线旋转; 所述臂中的一个具有多个可弹性变形的指状物，所述多个可弹性变形的指状物超过臂的端部朝向另一个臂，至少一个指状物在其内表面上具有线; 所述另一臂具有螺纹部分，所述螺纹部分的至少一部分被接收在所述指状物之间; 手指适于将两个臂的螺纹推动成相互接合，使得驱动臂围绕驱动轴的旋转沿着驱动轴线移动延伸臂; 其特征在于，所述两个螺纹被布置成使得当一个螺纹的脊被接收在另一个螺纹的凹槽中时，脊的两侧邻接凹槽的口部的两个边缘。

6. 发明申请

WO2009037425A1 A TUNEABLE BANDPASS FILTER 审中-公开
标题翻译：可调式BANDPASS过滤器
公开(公告)号：WO2009037425A1
公开(公告)日：2009-03-26
申请号：PCT/GB2008/003082
申请日：2008-09-11
申请人： ISOTEK ELECTRONICS LIMITED , RHODES, John, David , MOBBS, Christopher, Ian , IBBETSON, David
发明人： RHODES, John, David , MOBBS, Christopher, Ian , IBBETSON, David
IPC分类号： H01P1/20
CPC分类号： H01P1/20
摘要： A tuneable bandpass filter comprising a plurality of coupled resonators, the filter comprising a common structure comprising at least one common coupling (44) or one common resonator (7); an upper loop (8) comprising first and second end resonators coupled together by a signal path, the loop further comprising at least one further signal path extending between end resonators, the further signal path comprising at least one further resonator, the end resonators being coupled to the common structure; a lower loop (18) comprising first and second end resonators coupled together by a signal path, the loop further comprising at least one further signal path extending between end resonators, the further signal path comprising at least one further resonator, the end resonators being coupled to the common structure; the resonators being coupled together such that the bandpass filter can be divided into a low pass sub filter and a high pass sub filter, one of the sub filters being arranged to receive the output of the other.
摘要翻译：一种可调谐带通滤波器，包括多个耦合的谐振器，所述滤波器包括包括至少一个公共耦合（44）或一个公共谐振器（7）的公共结构; 包括通过信号路径耦合在一起的第一和第二端谐振器的上环路（8），所述环路还包括在端部谐振器之间延伸的至少一个另外的信号路径，所述另外的信号路径包括至少一个另外的谐振器，所述端部谐振器被耦合到共同的结构; 包括通过信号路径耦合在一起的第一和第二端谐振器的下环路（18），所述环路还包括在端部谐振器之间延伸的至少一个另外的信号路径，所述另外的信号路径包括至少一个另外的谐振器，所述端部谐振器被耦合到共同的结构; 谐振器被耦合在一起，使得带通滤波器可以被分成低通子滤波器和高通子滤波器，其中一个子滤波器布置成接收另一个的输出。

7. 发明申请

WO2009125197A1 A LINEAR ACTUATOR 审中-公开
标题翻译：线性执行器
公开(公告)号：WO2009125197A1
公开(公告)日：2009-10-15
申请号：PCT/GB2009/000946
申请日：2009-04-09
申请人： ISOTEK ELECTRONICS LIMITED , RHODES, John, David , MOBBS, Christopher, Ian , PANKS, Andrew, James
发明人： RHODES, John, David , MOBBS, Christopher, Ian , PANKS, Andrew, James
IPC分类号： F16H25/20
CPC分类号： F16H25/2009 , F16H25/2003
摘要： A linear actuator (1) comprising a drive arm (2) and an extension arm (3) each extending along a common drive axis (5); the extension arm (3) being at least partially received in a housing (4), the housing (4) allowing displacement of the extension arm (3) along the drive axis (5) but preventing rotation of the extension arm (3) about the drive axis; the drive arm (2) and extension arm (3) being interengaged such that rotation of the drive arm about the drive axis displaces the, extension arm along the drive axis; the housing comprising a housing body (6) and a plurality of resiliently deformable gripping fingers (8) extending from the housing (4) and gripping the extension arm (3) therebetween.
摘要翻译：一种线性致动器（1），包括驱动臂（2）和延伸臂（3），每个延伸臂沿公共驱动轴线（5）延伸; 所述延伸臂（3）至少部分地容纳在壳体（4）中，所述壳体（4）允许所述延伸臂（3）沿着所述驱动轴线（5）移位，但是防止所述延伸臂（3）围绕驱动轴; 驱动臂（2）和延伸臂（3）相互接合，使得驱动臂围绕驱动轴线的旋转沿着驱动轴线移动延伸臂; 所述壳体包括壳体（6）和从所述壳体（4）延伸并且夹持所述延伸臂（3）的多个可弹性变形的夹持指（8）。

8. 发明申请

WO2009027622A1 A TUNEABLE FILTER AND A METHOD OF TUNING SUCH A FILTER 审中-公开
标题翻译：可调滤波器和调谐滤波器的方法
公开(公告)号：WO2009027622A1
公开(公告)日：2009-03-05
申请号：PCT/GB2008/002652
申请日：2008-08-05
申请人： ISOTEK ELECTRONICS LIMITED , RHODES, John, David , PANKS, Andrew, James , MOBBS, Christopher, Ian
发明人： RHODES, John, David , PANKS, Andrew, James , MOBBS, Christopher, Ian
IPC分类号： H01P7/04 , H01P7/06
CPC分类号： H01P7/04 , H01P7/06
摘要： A tuneable filter comprising a filter body defining a tuning cavity; a tuning member within the tuning cavity; and, a linear actuator adapted to displace the tuning member within the cavity to tune the filter; the linear actuator comprising a motor; a drive arm connected to the motor and extending along a drive axis, the drive arm being adapted to be rotated about the drive axis by the motor; an extension arm extending along the drive axis being connected at one end to the tuning member and being in engagement with the drive arm at the other end; the engagement between the drive arm and extension arm being arranged such that rotation of the drive arm about the drive axis displaces the extension arm along the drive axis; each of the drive arm and extension arm comprising an end stop, the end stops being arranged such that as the extension arm reaches the end of its range of travel towards the drive arm the drive arm end stop rotates into abutment with the extension arm end stop, preventing further rotation of the drive arm.
摘要翻译：一种可调谐滤波器，包括限定调谐腔的滤波器主体; 调谐腔内的调谐构件; 以及线性致动器，其适于使所述调谐构件在所述空腔内移位以调谐所述过滤器; 所述线性致动器包括马达; 驱动臂，其连接到所述电动机并沿着驱动轴线延伸，所述驱动臂适于通过所述电动机围绕所述驱动轴线旋转; 沿着驱动轴延伸的延伸臂在一端连接到调谐构件并且在另一端处与驱动臂接合; 驱动臂和延伸臂之间的接合被布置成使得驱动臂围绕驱动轴的旋转沿着驱动轴线使延伸臂移位; 驱动臂和延伸臂中的每一个包括端部止动件，端部止动件布置成使得当延伸臂到达驱动臂的行进范围的端部时，驱动臂端部止动件转动成与延伸臂端部停止，防止驱动臂进一步旋转。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式