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

WO0219548A3 IMPROVED METHOD AND APPARATUS FOR UP- AND DOWN- CONVERSION OF RADIO FREQUENCY (RF) SIGNALS 审中-公开
标题翻译：用于射频（RF）信号的上变频和下变频的改进的方法和设备
公开(公告)号：WO0219548A3
公开(公告)日：2002-12-27
申请号：PCT/CA0100876
申请日：2001-06-19
申请人： SIRIFIC WIRELESS CORP , MANKU TAJINDER , SNYDER CHRIS , WEALE GARETH , WONG LAWRENCE
发明人： MANKU TAJINDER , SNYDER CHRIS , WEALE GARETH , WONG LAWRENCE
IPC分类号： H03D7/16 , H04B1/04 , H04B1/10 , H04B1/30
CPC分类号： H04B1/0475 , H03D7/161 , H04B1/1036 , H04B1/30
摘要： This patent describes a method and system which overcomes the LO-leakage problem during modulation and demodulation, common to direct conversion and similar RF transmitters and receivers. This problem is solved using a virtual local oscillator (VLO ) signal which emulates mixing with a local oscillators (LO) signal. The VLO signal is constructed using complementary mixing signals that suppress mixing power in the bandwidth of the input signal, and within the bandwidth of the output frequency. Specifically, mixing is done in two or more stages, using time-varying mixing signals phi 1 and phi 2 which satisfy the following criteria: phi 1 * phi 2 having significant power at the frequency of the LO being emulated, one of phi 1 and phi 2 having minimal p ower around the frequency of the output signal y(t) , and the other of phi 1 and phi 2 having minimal power around the centre frequency, fRF, of the input signal x(t) .
摘要翻译：该专利描述了一种方法和系统，其克服了调制和解调期间的LO泄漏问题，这对于直接转换和类似的RF发射机和接收机是常见的。该问题通过使用模仿与本地振荡器（LO）信号混合的虚拟本地振荡器（VLO TM）信号来解决。 VLO信号由互补混频信号构成，这些信号抑制输入信号带宽中的混频功率，并且在输出频率的带宽内。具体地，使用满足以下标准的时变混频信号phi 1和phi 2以两个或更多个阶段进行混合：在仿真LO的频率处具有显着功率的ph 1 * ph 2，ph 1和 φ2在输出信号y（t）的频率附近具有最小的功率，而φ1和φ2中的另一个在输入信号 X（t）的的。

2. 发明申请

WO2004010576A9 MULTI-STANDARD AMPLIFIER 审中-公开
标题翻译：多标准放大器
公开(公告)号：WO2004010576A9
公开(公告)日：2004-05-13
申请号：PCT/CA0301066
申请日：2003-07-24
申请人： SIRIFIC WIRELESS CORP , KHAJEHPOUR JAVAD
发明人： KHAJEHPOUR JAVAD
IPC分类号： H03F3/45 , H03F3/72
CPC分类号： H03F1/565 , H03F1/3211 , H03F3/195 , H03F3/45188 , H03F3/45475 , H03F3/72 , H03F2200/111 , H03F2200/294 , H03F2200/372 , H03F2200/429 , H03F2200/451 , H03F2203/45371 , H03F2203/45386 , H03F2203/45481 , H03F2203/45616 , H03F2203/45704 , H03F2203/45726 , H03F2203/7239 , H03J2200/10
摘要： The present invention relates generally to amplifiers, and more specifically to multi-band and/or multi-standard low noise amplifiers. There are currently no inexpensive, highperformance, fully-integrable, multi-standard low noise amplifiers (LNAs) available. The invention provides a suitable LNA for a multi-band and/or multi-standard receiver in wireless and other applications. This LNA comprises a positive signal amplifier having a first input for receiving a positive RF signal, and a first output for providing an amplified positive RF signal; a negative signal amplifier having a second input for receiving a negative RF signal, and a second output for providing an amplified negative RF signal; and a tunable differential filter having a tuning control input, a third input for said first output and a fourth input for said second output; the frequency response of said tunable differential filter varying with a control signal input to said tuning control input, whereby signal of undesired frequencies may be filtered from said first output and said second output.
摘要翻译：本发明一般涉及放大器，更具体地涉及多频和/或多标准低噪声放大器。目前还没有廉价，高性能，完全可集成的多标准低噪声放大器（LNA）。本发明为无线和其他应用中的多频带和/或多标准接收机提供了合适的LNA。该LNA包括具有用于接收正RF信号的第一输入端的正信号放大器和用于提供放大的正RF信号的第一输出端; 具有用于接收负RF信号的第二输入的负信号放大器和用于提供放大的负RF信号的第二输出; 以及可调谐差分滤波器，其具有调谐控制输入，用于所述第一输出的第三输入和用于所述第二输出的第四输入; 所述可调谐差分滤波器的频率响应随着输入到所述调谐控制输入的控制信号而变化，由此可以从所述第一输出和所述第二输出滤除不期望频率的信号。

3. 发明申请

WO03019800A3 METHOD AND APPARATUS FOR CONVERSION OF RADIO FREQUENCY (RF) SIGNALS USING APERIODIC MIXING SIGNALS 审中-公开
标题翻译：使用APERIODIC混合信号转换无线电频率（RF）信号的方法和装置
公开(公告)号：WO03019800A3
公开(公告)日：2003-10-09
申请号：PCT/CA0201316
申请日：2002-08-28
申请人： SIRIFIC WIRELESS CORP , MANKU TAJINDER , LING YANG , KUNG WILLIAM
发明人： MANKU TAJINDER , LING YANG , KUNG WILLIAM
IPC分类号： H03D7/14 , H04B1/28 , H03D7/16
CPC分类号： H04B1/28 , H03D7/1433 , H03D7/1441 , H03D7/1466 , H03D7/1483 , H03D2200/0025 , H03D2200/0043 , H03D2200/0084 , H03D2200/009
摘要： There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver. The invention provides a topology that satisfies this need, consisting of: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aperiodic mixing signals. The use of aperiodic mixing signals allows a fully-integrated transceiver to be built. Several embodiments of the active mixer are also presented, including those having electrically-adjustable performance and allowing multiple RF signal inputs. This allows the topology of the invention to be employed in multi-band, multi-frequency applications, while still providing high performance.
摘要翻译：需要一种便宜，高性能，完全可集成的多标准收发器。本发明提供了满足这种需要的拓扑结构，其包括：主动混频器，紧跟着高通滤波器和无源混频器。输入信号使用一对互补的非周期性混合信号进行调制或解调。使用非周期混合信号可以建立一个完全集成的收发器。还提出了有源混频器的几个实施例，包括具有电可调性能并允许多个RF信号输入的实施例。这允许本发明的拓扑结构被应用于多频带，多频应用，同时仍然提供高性能。

4. 发明申请

WO0117120A2 IMPROVED METHOD AND APPARATUS FOR DOWN-CONVERSION OF RADIO FREQUENCY (RF) SIGNALS 审中-公开
标题翻译：无线电频率（RF）信号下变频的改进方法和装置
公开(公告)号：WO0117120A2
公开(公告)日：2001-03-08
申请号：PCT/CA0000994
申请日：2000-09-01
申请人： SIRIFIC WIRELESS CORP , MANKU TAJINDER , WONG LAWRENCE , LING YANG
发明人： MANKU TAJINDER , WONG LAWRENCE , LING YANG
IPC分类号： H03D3/00 , H03D7/16 , H04B1/00 , H04B1/04 , H04B1/30
CPC分类号： H04B1/30 , H03D3/008 , H03D7/163 , H03D7/166 , H04B1/00 , H04B1/0475 , H04B2001/0491
摘要： This patent describes a method of removing the LO-leakage and 1/f noise problems associated with direct conversion RF receivers and other demodulators. In order to solve this problem a virtual LO signal is generated within the RF signal path which is tuned to the incoming RF signal. The virtual local oscillator (VLO) signal is constructed using signals that do not contain a significant amount of power (or no power at all) at the LO frequency. Any errors in generating the virtual LO signal are minimized using a closed loop correction scheme.
摘要翻译：该专利描述了一种去除与直接转换RF接收机和其他解调器相关的LO泄漏和1 / f噪声问题的方法。为了解决这个问题，在RF信号路径内产生虚拟LO TM信号，该RF信号路径被调谐到输入的RF信号。虚拟本地振荡器（VLO）信号使用在LO频率下不包含大量功率（或完全没有功率）的信号构成。使用闭环校正方案来最小化产生虚拟LO信号的任何错误。

5. 发明申请

WO2008074158A8 CLOSED-LOOP DIGITAL POWER CONTROL FOR A WIRELESS TRANSMITTER 审中-公开
标题翻译：无线发射机闭环数字功率控制
公开(公告)号：WO2008074158A8
公开(公告)日：2008-08-07
申请号：PCT/CA2007002352
申请日：2007-12-21
申请人： SIRIFIC WIRELESS CORP , BELLAOUAR ABDELLATIF , MANKU TAJINDER
发明人： BELLAOUAR ABDELLATIF , MANKU TAJINDER
IPC分类号： H04B1/40 , H04B7/005
CPC分类号： H03G3/3047 , H04B2001/0416
摘要： A closed loop power output calibration system for variable power output wireless devices. The wireless device includes a wireless transceiver having a transmit core coupled to a discrete power amplifier. Power detection circuitry formed in the wireless transceiver provides a detected power level of the power amplifier, and a reference power level, both of which are converted to digital signals using existing I and Q signal analog to digital converters in the receiver core. The digital signals are processed to cancel power distortion and temperature effects to provide a resulting power feedback signal. Corrective control signals are generated in response to the power feedback signal relative to a desired power output level. The gain in the transmit core is then adjusted in response to the corrective control signals such that the power amplifier outputs the target output power level.
摘要翻译：一种用于可变功率输出无线设备的闭环功率输出校准系统。无线设备包括具有耦合到分立功率放大器的发射芯的无线收发器。在无线收发器中形成的功率检测电路提供功率放大器的检测功率电平和参考功率电平，两者都使用接收机核心中现有的I和Q信号模数转换器转换成数字信号。处理数字信号以消除功率失真和温度影响，以提供最终的功率反馈信号。响应于功率反馈信号相对于期望的功率输出电平产生校正控制信号。然后响应于校正控制信号调整发送内核中的增益，使得功率放大器输出目标输出功率电平。

6. 发明申请

WO2008074129B1 DIGITAL CHARGE PUMP PLL ARCHITECTURE 审中-公开
标题翻译：数字充电泵PLL架构
公开(公告)号：WO2008074129B1
公开(公告)日：2008-08-07
申请号：PCT/CA2007002247
申请日：2007-12-13
申请人： SIRIFIC WIRELESS CORP , MANKU TAJINDER , SNYDER CHRISTOPHER
发明人： MANKU TAJINDER , SNYDER CHRISTOPHER
IPC分类号： H03K5/135 , H03L7/06 , H03L7/091 , H03L7/099
CPC分类号： H03K5/135 , H03L7/091 , H03L7/093 , H03L7/099 , H03L7/10
摘要： A digital phase lock loop (PLL) circuit having a digital charge pump circuit for providing digital signals corresponding to a difference in phase between an internal clock corresponding to a voltage controlled oscillator, and a reference clock. These digital signals are processed by a digital processing circuit for providing digital control signals. Some of the digital control signals are converted into an analog control signal to provide fine control of the voltage controlled oscillator, while the remaining digital control signals provide coarse control of the voltage controlled oscillator.
摘要翻译：一种具有数字电荷泵电路的数字锁相环（PLL）电路，用于提供对应于与压控振荡器相对应的内部时钟之间的相位差的数字信号和参考时钟。这些数字信号由用于提供数字控制信号的数字处理电路处理。一些数字控制信号被转换成模拟控制信号以提供压控振荡器的精细控制，而剩余的数字控制信号提供压控振荡器的粗略控制。

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