专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明授权

US06657425B2 Power measurement circuit including harmonic filter 有权
标题翻译：功率测量电路包括谐波滤波器
公开(公告)号：US06657425B2
公开(公告)日：2003-12-02
申请号：US09891668
申请日：2001-06-26
申请人： Tirdad Sowlati , Sifen Luo
发明人： Tirdad Sowlati , Sifen Luo
IPC分类号： G01R2502
CPC分类号： G01R21/12 , G01R21/10
摘要： A shorting element, preferably a resonant inductor-capacitor circuit, is inserted in parallel with a sense transistor, which itself is in parallel with a power transistor. The use of the shorting element in combination with the sense transistor, provides a technique to have a monotonic power detection. The shorting element eliminates extraneous currents caused by inherent collector-base and collector-substrate diodes of sense transistor, and also eliminates the extraneous collector voltage swing of the sense transistor caused by mutual coupling between inductors connected to the power and sense transistors.
摘要翻译：短路元件，优选谐振电感器 - 电容器电路与感测晶体管并联插入，读出晶体管本身与功率晶体管并联。使用短路元件与感测晶体管组合提供了一种具有单调功率检测的技术。短路元件消除了由感测晶体管的固有集电极 - 基极和集电极 - 基极二极管引起的外部电流，并且还消除了由连接到功率和感测晶体管的电感器之间的相互耦合引起的感测晶体管的外部集电极电压摆幅。

12. 发明授权

US06496074B1 Cascode bootstrapped analog power amplifier circuit 失效
标题翻译： Cascode自举模拟功率放大器电路
公开(公告)号：US06496074B1
公开(公告)日：2002-12-17
申请号：US09671890
申请日：2000-09-28
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H03F122
CPC分类号： H03F1/523 , H03F1/223
摘要： A cascode bootstrapped analog power amplifier circuit includes a first MOSFET and a second MOSFET connected in series and coupled between a dc voltage source terminal and a common terminal. An rf input signal terminal is coupled to a gate electrode of the first MOSFET and a dc control voltage terminal is coupled to a gate electrode of the second MOSFET, with a unidirectionally-conducting element such as a diode-connected MOSFET being coupled between a drain electrode and the gate electrode of the second MOSFET. The output of the amplifier circuit is taken from the drain electrode of the second MOSFET. This circuit configuration, permits he first and second MOSFETs to withstand a larger output voltage swing, thus permitting the use of a higher supply voltage and resulting in a substantially increased maximum output power capability for a given load value.
摘要翻译：级联自举模拟功率放大器电路包括串联连接并耦合在直流电压源端子和公共端子之间的第一MOSFET和第二MOSFET。 RF输入信号端子耦合到第一MOSFET的栅电极，并且直流控制电压端子耦合到第二MOSFET的栅电极，其中单向导电元件例如二极管连接的MOSFET耦合在漏极电极和第二MOSFET的栅电极。放大器电路的输出取自第二MOSFET的漏电极。该电路配置允许他的第一和第二MOSFET承受更大的输出电压摆幅，从而允许使用更高的电源电压，并且对于给定的负载值而导致基本上增加的最大输出功率能力。

13. 发明授权

US06456163B1 High-frequency amplifier circuit having a directly-connected bias circuit 失效
标题翻译：高频放大器电路具有直接连接的偏置电路
公开(公告)号：US06456163B1
公开(公告)日：2002-09-24
申请号：US09801623
申请日：2001-03-08
申请人： Sifen Luo , Tirdad Sowlati
发明人： Sifen Luo , Tirdad Sowlati
IPC分类号： H03F304
CPC分类号： H03F1/302
摘要： A high-frequency amplifier circuit includes an amplifying transistor and a bias circuit directly connected to said amplifying transistor. The bias circuit includes a bias transistor having a control terminal and an inductor coupled to the control terminal, and the bias transistor also has an output terminal directly connected to the amplifying transistor. A resistor is connected in series with the inductor, and the series-connected components are connected in the circuit between the control terminal and a power supply terminal. By providing an inductor in the amplifier in this manner, loading effects on the amplifying transistor at high frequencies is substantially reduced.
摘要翻译：高频放大器电路包括放大晶体管和与所述放大晶体管直接连接的偏置电路。偏置电路包括具有控制端子和耦合到控制端子的电感器的偏置晶体管，偏置晶体管还具有直接连接到放大晶体管的输出端子。电感器与电感器串联连接，串联连接的元件连接在控制端子和电源端子之间的电路中。通过以这种方式在放大器中提供电感器，大幅减少了在高频下对放大晶体管的负载效应。

14. 发明授权

US06417734B1 High-frequency amplifier circuit with negative impedance cancellation 有权
标题翻译：具有负阻抗消除功能的高频放大电路
公开(公告)号：US06417734B1
公开(公告)日：2002-07-09
申请号：US09603875
申请日：2000-06-26
申请人： Sifen Luo , Tirdad Sowlati
发明人： Sifen Luo , Tirdad Sowlati
IPC分类号： H03F304
CPC分类号： H03F3/19 , H03F1/301 , H03F3/193 , H03F3/3432 , H03F3/345
摘要： A high-frequency amplifier circuit includes an amplifying transistor and a driver transistor, with the amplifying transistor being connected in either a common emitter or a common source configuration and the driver transistor being connected in a corresponding common collector or a common drain configuration, depending upon whether bipolar or field effect transistors are used. A current-mirror bias circuit is coupled between an input terminal and an output terminal of the driver transistor, with a resistor being provided for coupling the current mirror to the input terminal of the driver transistor. The resistor, which typically has a value of between about 20 and 100 ohms, provides a negative impedance cancellation effect while minimizing power consumption at low bias levels.
摘要翻译：高频放大器电路包括放大晶体管和驱动晶体管，放大晶体管以公共发射极或公共源配置连接，驱动晶体管连接在相应的公共集电极或公共漏极配置中，具体取决于是否使用双极或场效晶体管。电流镜偏置电路耦合在驱动晶体管的输入端和输出端之间，提供电阻用于将电流镜耦合到驱动晶体管的输入端。通常具有约20和100欧姆之间的值的电阻器提供负阻抗消除效应，同时使低偏置电平下的功率消耗最小化。

15. 发明授权

US07920836B2 System and method for saturation detection, correction and recovery in a polar transmitter 有权
标题翻译：用于极性发射机饱和检测，校正和恢复的系统和方法
公开(公告)号：US07920836B2
公开(公告)日：2011-04-05
申请号：US12715705
申请日：2010-03-02
申请人： Dmitriy Rozenblit , Tirdad Sowlati , Darioush Agahi
发明人： Dmitriy Rozenblit , Tirdad Sowlati , Darioush Agahi
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/32 , H03F1/34 , H03F3/189 , H03F3/24 , H03F2200/438 , H03G3/3047 , H04B2001/0433
摘要： A system for saturation detection, correction and recovery in a power amplifier includes a power amplifier, a closed power control loop configured to develop a power control signal (VPC), and power control circuitry configured to reduce the power control signal if the power amplifier is operating in a saturation mode.
摘要翻译：一种用于功率放大器中的饱和度检测，校正和恢复的系统包括：功率放大器，被配置为开发功率控制信号（VPC）的闭合功率控制回路;以及功率控制电路，其被配置为如果功率放大器为在饱和模式下工作。

16. 发明授权

US07764055B2 Polar transmitter having a dynamically controlled voltage regulator and method for operating same 有权
标题翻译：具有动态控制的电压调节器的极性发射器及其操作方法
公开(公告)号：US07764055B2
公开(公告)日：2010-07-27
申请号：US11483687
申请日：2006-07-10
申请人： Dmitriy Rozenblit , Tirdad Sowlati , Morten Damgaard , Darioush Agahi
发明人： Dmitriy Rozenblit , Tirdad Sowlati , Morten Damgaard , Darioush Agahi
IPC分类号： G05F1/00
CPC分类号： H04B1/04 , H03F1/0227 , H03G3/3047 , H04B2001/0416 , H04W52/367 , H04W52/52
摘要： A supply voltage controlled power amplifier includes a power amplifier, a closed power control loop configured to generate a power control signal, and a voltage regulator coupled to the power control loop, the voltage regulator including a first regulator stage, a second regulator stage, and a peak detector, wherein an output of the second regulator stage is applied as a feedback signal to the first regulator stage and wherein an output of the first regulator stage is decreased to a level consistent with an output of the power amplifier and an additional operating buffer amount.
摘要翻译：电源电压控制功率放大器包括功率放大器，被配置为产生功率控制信号的闭合功率控制回路和耦合到功率控制回路的电压调节器，所述电压调节器包括第一调节器级，第二调节器级和峰值检测器，其中将第二调节器级的输出作为反馈信号施加到第一调节器级，并且其中第一调节器级的输出减小到与功率放大器的输出和附加操作缓冲器一致的电平量。

17. 发明授权

US07515880B2 Variable gain frequency multiplier 失效
标题翻译：可变增益倍频器
公开(公告)号：US07515880B2
公开(公告)日：2009-04-07
申请号：US11348001
申请日：2006-02-06
申请人： Dmitriy Rozenblit , Rajasekhar Pullela , Tirdad Sowlati , Shahrzad Tadjpour
发明人： Dmitriy Rozenblit , Rajasekhar Pullela , Tirdad Sowlati , Shahrzad Tadjpour
IPC分类号： H04B1/38
CPC分类号： H03B19/14 , H03G3/3047 , H03L7/081 , H03L7/087 , H03L7/0992 , H03L7/1978 , H03L7/23
摘要： A variable gain frequency multiplier comprises a multiplier circuit and a control circuit configured to receive a power control signal, the power control signal being proportional to a power output signal.
摘要翻译：可变增益倍频器包括乘法器电路和被配置为接收功率控制信号的控制电路，功率控制信号与功率输出信号成比例。

18. 发明授权

US07512393B2 Downconverting mixer 有权
标题翻译：下变频混频器
公开(公告)号：US07512393B2
公开(公告)日：2009-03-31
申请号：US11250995
申请日：2005-10-14
申请人： Raja Pullela , Peihua Ye , Tirdad Sowlati
发明人： Raja Pullela , Peihua Ye , Tirdad Sowlati
IPC分类号： H04B1/26 , G06F3/033
CPC分类号： H03D7/18 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/165 , H03D2200/0047
摘要： A downconverter is provided. The downconverter includes a I mixer and a Q mixer. Each mixer includes a transconductance stage and a mixer core stage. The outputs of the transconductance stages of the mixers are shorted together, and a resistors are arranged in series with an input of the mixer core stages.
摘要翻译：提供下变频器。下变频器包括I混频器和Q混频器。每个混合器包括跨导级和混频器核级。混频器的跨导级的输出短路在一起，并且电阻器与混频器核心级的输入串联布置。

19. 发明授权

US07398073B2 Low noise mixer 有权
标题翻译：低噪音混音器
公开(公告)号：US07398073B2
公开(公告)日：2008-07-08
申请号：US11220030
申请日：2005-09-06
申请人： Rajasekhar Pullela , Tirdad Sowlati , Dmitriy Rozenblit
发明人： Rajasekhar Pullela , Tirdad Sowlati , Dmitriy Rozenblit
IPC分类号： H04B1/26
CPC分类号： H04B1/28 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/165 , H03D2200/0019 , H03D2200/0084
摘要： A low noise mixer comprises a first mixer core configured to receive a radio frequency (RF) input signal having an RF frequency, and a first local oscillator signal, wherein the first local oscillator signal is at a frequency that is nominally twice the frequency of the RF frequency, the first mixer core configured to switch the RF input signal to at least one secondary mixer core at a frequency that coincides with the frequency of the first local oscillator signal, the at least one secondary mixer core configured to receive the switched RF input signal and a second local oscillator signal, where the second local oscillator signal is at the same nominal frequency as the RF input signal, and wherein switching the RF input signal at the frequency of the first local oscillator signal substantially eliminates flicker noise associated with the down-conversion process.
摘要翻译：低噪声混频器包括被配置为接收具有RF频率的射频（RF）输入信号和第一本地振荡器信号的第一混频器核心，其中第一本地振荡器信号的频率是标称频率为 RF频率，所述第一混频器核心被配置为以与所述第一本机振荡器信号的频率一致的频率将所述RF输入信号切换到至少一个辅助混频器内核，所述至少一个辅助混频器核心被配置为接收所述切换的RF输入信号和第二本地振荡器信号，其中第二本机振荡器信号处于与RF输入信号相同的标称频率，并且其中以第一本地振荡器信号的频率切换RF输入信号基本上消除与下降相关联的闪烁噪声转换过程。

20. 发明授权

US07366484B2 Systems and methods for adjusting the bias level of a mixer in a transmitter 有权
标题翻译：用于调整发射机中混频器偏置电平的系统和方法
公开(公告)号：US07366484B2
公开(公告)日：2008-04-29
申请号：US10861870
申请日：2004-06-04
申请人： Tirdad Sowlati
发明人： Tirdad Sowlati
IPC分类号： H04B1/04
CPC分类号： H03D7/1425 , H03D7/145 , H03D7/1458 , H03D7/1491 , H03D7/165 , H03D2200/0033 , H03D2200/0043
摘要： A mixer having dynamic biasing, comprises a mixer configured to receive a local oscillator (LO) reference signal and a radio frequency (RF) data signal, and a bias control circuit configured to reduce bias current from the mixer under a low power condition.
摘要翻译：具有动态偏置的混频器包括配置成接收本地振荡器（LO）参考信号和射频（RF）数据信号的混频器，以及配置为在低功率条件下减少来自混频器的偏置电流的偏置控制电路。

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