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1. 发明申请

US20050258989A1 Hybrid DC offset cancellation scheme for wireless receiver 有权
标题翻译：无线接收机的混合直流偏移消除方案
公开(公告)号：US20050258989A1
公开(公告)日：2005-11-24
申请号：US10851307
申请日：2004-05-21
申请人： Kuangyu Li , Song-Nien Tang , Jackie Cheng , Zaw Soe
发明人： Kuangyu Li , Song-Nien Tang , Jackie Cheng , Zaw Soe
IPC分类号： H03M1/06 , H03M1/10 , H03M1/18
CPC分类号： H03M1/1019 , H03M1/18
摘要： Systems and methods for canceling static and dynamic DC offsets by combining a digital DC offset correction scheme with an analog DC offset correction scheme. A feedback-based digital DC offset correction scheme provides different adjustment levels for a plurality of discrete gain states and the analog DC offset correction scheme operates in different cancellation modes dependent on a frame structure. A digital DC offset correction scheme collects DC offset control information and provides adjustment levels. In addition, a negative-feedback based switchable high pass filter has a plurality modes of operation, where one mode of operation includes an all-pass filter.
摘要翻译：通过组合数字直流偏移校正方案和模拟直流偏移校正方案来消除静态和动态直流偏移的系统和方法。基于反馈的数字DC偏移校正方案为多个离散增益状态提供不同的调整电平，并且模拟DC偏移校正方案根据帧结构在不同的取消模式下操作。数字DC偏移校正方案收集直流偏移控制信息并提供调整电平。此外，基于负反馈的可切换高通滤波器具有多种操作模式，其中一种操作模式包括全通滤波器。

2. 外观设计

USD456535S1 Fluted candle 失效
标题翻译：开口蜡烛
公开(公告)号：USD456535S1
公开(公告)日：2002-04-30
申请号：US29130864
申请日：2000-10-11
申请人： Jackie Cheng Chak Yin
设计人： Jackie Cheng Chak Yin

3. 发明授权

US06992526B2 Apparatus and method for DC offset reduction 有权
标题翻译：用于DC偏移减少的装置和方法
公开(公告)号：US06992526B2
公开(公告)日：2006-01-31
申请号：US10794410
申请日：2004-03-05
申请人： Jackie Cheng
发明人： Jackie Cheng
IPC分类号： H03F1/02
CPC分类号： H03F3/195 , H03F3/45475 , H03F3/45973 , H03F2200/294 , H03F2200/411
摘要： A feedback system has a settling time that is independent of the forward gain of the amplifier stage, and a feedback path that is responsive to the magnitude of DC offset in the output signal. Settling time may be made independent of the forward gain of the amplifier stage by providing a constant loop gain in the amplifier stage through active gain control of both the forward and linear feedback amplifier elements. The feedback path may be made responsive to the magnitude of DC offset in the output signal by providing a non-linear transconductance in the feedback path that varies the high pass corner and hence the DC offset reduction time of the amplifier stage in response the magnitude of DC offset in the output signal.
摘要翻译：反馈系统具有独立于放大器级的正向增益的稳定时间，以及响应于输出信号中的DC偏移的幅度的反馈路径。可以通过在放大器级中通过正向和反馈放大器元件的有源增益控制提供恒定的环路增益来独立于放大器级的正向增益来建立稳定时间。可以通过在反馈路径中提供非线性跨导来响应于输出信号中的DC偏移的幅度来反馈反馈路径，该反馈路径改变放大器级的高通角并因此响应于幅度大小的DC偏移减小时间输出信号中的直流偏移。

4. 发明申请

US20050266806A1 Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators 有权
标题翻译：具有独立可变RF和IF本地振荡器以及独立的高侧和低侧RF本地振荡器的多频带RF发射器和接收器
公开(公告)号：US20050266806A1
公开(公告)日：2005-12-01
申请号：US10856125
申请日：2004-05-28
申请人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
发明人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
IPC分类号： H04B1/06 , H04B1/40 , H04B7/00
CPC分类号： H04B1/403
摘要： Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
摘要翻译：多级RF发射器和接收器电路可以使用独立可变的RF和IF本地振荡器，允许将给定RF通道的RF和IF本地振荡器频率选择为相对于本地振荡器电路使用的参考振荡器具有大的共同因子，从而允许在本地振荡器电路中使用小的除数，并减少相位噪声。独立的高侧和低端RF本地振荡器可以根据要发送或接收的RF信道来提供和选择性地使用。

5. 发明授权

US06720834B2 Tunable resonant circuit and voltage controlled oscillator using same 有权
标题翻译：可调谐谐振电路和压控振荡器使用相同
公开(公告)号：US06720834B2
公开(公告)日：2004-04-13
申请号：US10121366
申请日：2002-04-11
申请人： Evan S. McCarthy , Jackie Cheng
发明人： Evan S. McCarthy , Jackie Cheng
IPC分类号： H03B512
CPC分类号： H03B5/08 , H03B2201/0208 , H03B2201/0266 , H03J2200/10
摘要： A programmable capacitive network for use in a tunable resonant circuit is set forth that may be used in a number of different applications, but is particularly useful in the tuning of a voltage controlled oscillator formed on a substrate, such as a semiconductor substrate or the like. The programmable capacitive network includes a plurality of capacitive elements. An interconnected network of voltage gate elements and fuse elements are interconnected with the capacitive elements to selectively connect one or more of the plurality of capacitive elements in the resonant circuit in response to at least one program control signal. In accordance with one embodiment, the voltage gate elements are diodes.
摘要翻译：阐述了一种用于可调谐谐振电路的可编程电容网络，可用于许多不同的应用，但是在对诸如半导体衬底等的衬底上形成的压控振荡器进行调谐特别有用。可编程电容网络包括多个电容元件。电压门元件和熔丝元件的互连网络与电容元件互连，以响应于至少一个程序控制信号选择性地连接谐振电路中的多个电容元件中的一个或多个。根据一个实施例，电压门元件是二极管。

6. 发明授权

US07266352B2 Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators 有权
标题翻译：具有独立可变RF和IF本地振荡器以及独立的高侧和低侧RF本地振荡器的多频带RF发射器和接收器
公开(公告)号：US07266352B2
公开(公告)日：2007-09-04
申请号：US10856125
申请日：2004-05-28
申请人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
发明人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
IPC分类号： H04B1/16
CPC分类号： H04B1/403
摘要： Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
摘要翻译：多级RF发射器和接收器电路可以使用独立可变的RF和IF本地振荡器，允许将给定RF通道的RF和IF本地振荡器频率选择为相对于本地振荡器电路使用的参考振荡器具有大的共同因子，从而允许在本地振荡器电路中使用小的除数，并减少相位噪声。独立的高侧和低端RF本地振荡器可以根据要发送或接收的RF信道来提供和选择性地使用。

7. 发明申请

US20050195024A1 Apparatus and method for DC offset reduction 有权
标题翻译：用于DC偏移减少的装置和方法
公开(公告)号：US20050195024A1
公开(公告)日：2005-09-08
申请号：US10794410
申请日：2004-03-05
申请人： Jackie Cheng
发明人： Jackie Cheng
IPC分类号： H03F20060101 , H03F1/02
CPC分类号： H03F3/195 , H03F3/45475 , H03F3/45973 , H03F2200/294 , H03F2200/411
摘要： A feedback system has a settling time that is independent of the forward gain of the amplifier stage, and a feedback path that is responsive to the magnitude of DC offset in the output signal. Settling time may be made independent of the forward gain of the amplifier stage by providing a constant loop gain in the amplifier stage through active gain control of both the forward and linear feedback amplifier elements. The feedback path may be made responsive to the magnitude of DC offset in the output signal by providing a non-linear transconductance in the feedback path that varies the high pass corner and hence the DC offset reduction time of the amplifier stage in response the magnitude of DC offset in the output signal.
摘要翻译：反馈系统具有独立于放大器级的正向增益的稳定时间，以及响应于输出信号中的DC偏移的幅度的反馈路径。可以通过在放大器级中通过正向和反馈放大器元件的有源增益控制提供恒定的环路增益来独立于放大器级的正向增益来建立稳定时间。可以通过在反馈路径中提供非线性跨导来响应于输出信号中的DC偏移的幅度来反馈反馈路径，该反馈路径改变放大器级的高通角并因此响应于幅度大小的DC偏移减小时间输出信号中的直流偏移。

8. 发明授权

US06933789B2 On-chip VCO calibration 有权
公开(公告)号：US06933789B2
公开(公告)日：2005-08-23
申请号：US10712596
申请日：2003-11-13
申请人： Alyosha C. Molnar , Rahul Magoon , Madhukar Reddy , Jackie Cheng
发明人： Alyosha C. Molnar , Rahul Magoon , Madhukar Reddy , Jackie Cheng
IPC分类号： H03L7/099 , H03L7/00 , H03B27/00
CPC分类号： H03L7/099
摘要： Embodiments of the invention provide techniques for calibrating voltage-controlled oscillators (VCOs). Multiple VCOs may be disposed on a chip with the VCOs having different frequency ranges. The VCOs may be selected and tested to determine a desired VCO to use to tune to a selected channel frequency. Each of the VCOs has multiple possible varactor configurations. The varactor configurations of the desired VCO determined to be used to tune to the selected channel frequency can be selected and tested to determine a desired varactor configuration for the desired VCO. The desired VCO with the desired varactor configuration will preferably be able to produce a full range of desired frequencies corresponding to all channel frequencies desired.

9. 发明授权

US06707342B1 Multiple-VCO tuning 有权
标题翻译：多VCO调谐
公开(公告)号：US06707342B1
公开(公告)日：2004-03-16
申请号：US10114182
申请日：2002-04-02
申请人： Jeffrey M. Zachan , Jackie Cheng , Alyosha C. Molnar
发明人： Jeffrey M. Zachan , Jackie Cheng , Alyosha C. Molnar
IPC分类号： H03L7099
CPC分类号： H03L7/10 , H03L7/099 , H03L7/18 , Y10S331/02
摘要： A tuning circuit for use in tuning multiple voltage-controlled oscillators (VCOs) of a phase-locked loop (PLL) is provided. A search algorithm is used to determine which VCO to use for a given frequency to be synthesized by the PLL. The tuning circuit provides a binary representation, associated with the frequency to synthesize, to the PLL. The PLL responds to this representation by attempting to synthesize the associated frequency. New binary representations are provided until an indication of a threshold frequency between multiple VCOs is determined. A record of the threshold frequency is stored. The binary representation of a frequency to be synthesized and the stored record of the threshold frequency are used to provide an indication of which VCO of the PLL to use to synthesize the desired frequency.
摘要翻译：提供了用于调谐锁相环（PLL）的多个压控振荡器（VCO）的调谐电路。搜索算法用于确定要由PLL合成给定频率的哪个VCO。调谐电路提供与PLL频率合成的二进制表示。 PLL通过尝试合成相关频率来响应该表示。提供新的二进制表示，直到确定多个VCO之间的阈值频率的指示。存储阈值频率的记录。将要合成的频率的二进制表示和阈值频率的存储记录用于提供用于合成所需频率的PLL的哪个VCO的指示。

10. 发明授权

US06965256B2 Current mode output stage circuit with open loop DC offset reduction 有权
标题翻译：电流模式输出级电路，具有开环DC补偿减少
公开(公告)号：US06965256B2
公开(公告)日：2005-11-15
申请号：US10856076
申请日：2004-05-28
申请人： Jackie Cheng
发明人： Jackie Cheng
IPC分类号： H02M3/18 , H03F3/45
CPC分类号： G05F3/262
摘要： An output stage circuit for a current mode device provides open loop reduction or cancellation of DC offset in differential output signals. Differential input signals are received and sourcing current mirrors provide mirrors of the differential input signals to output nodes. Sinking current mirrors also provide mirrors of opposite polarity of the differential input signals to the output nodes corresponding to the opposing sourcing current mirrors. The summing of the mirror currents at the output nodes substantially reduces or eliminates the DC offset components present in the input signals.
摘要翻译：用于电流模式器件的输出级电路在差分输出信号中提供开环减小或DC补偿的消除。差分输入信号被接收并且源电流镜提供差分输入信号到输出节点的反射镜。下沉电流镜还提供与对应的源电流镜对应的输出节点的差分输入信号相反极性的反射镜。在输出节点处的镜像电流的总和大大减少或消除输入信号中存在的DC偏移分量。

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