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51. 发明申请

US20100328546A1 Tracking Filter For A Television Tuner 有权
标题翻译：电视调谐器的跟踪滤波器
公开(公告)号：US20100328546A1
公开(公告)日：2010-12-30
申请号：US12493819
申请日：2009-06-29
申请人： Aslamali A. Rafi , Chunyu Xin , Ruifeng Sun , Abhishek Kammula , Ramin Khoini-Poorfard , Alessandro Piovaccari , Peter J. Vancorenland
发明人： Aslamali A. Rafi , Chunyu Xin , Ruifeng Sun , Abhishek Kammula , Ramin Khoini-Poorfard , Alessandro Piovaccari , Peter J. Vancorenland
IPC分类号： H04N5/50 , H04B1/10 , H04B1/06
CPC分类号： H03J3/06 , H03J3/32 , H03J2200/10 , H03J2200/32 , H04N5/50
摘要： In one embodiment, a set of tracking filters to be coupled between an amplifier and a mixer is provided. The tracking filters may be differently configured depending on band of operation. For example, a first set of the filters can be configured to maintain a substantially constant Q value across their operating bandwidth while a second set of the filters can be configured to maintain a substantially constant bandwidth across their operating bandwidth.
摘要翻译：在一个实施例中，提供要耦合在放大器和混频器之间的一组跟踪滤波器。根据操作频带，跟踪滤波器可以被不同地配置。例如，可以将第一组滤波器配置为在其工作带宽上维持基本上恒定的Q值，而第二组滤波器可被配置为在其工作带宽上维持基本恒定的带宽。

52. 发明授权

US07860480B2 Method and apparatus for controlling a harmonic rejection mixer 有权
标题翻译：用于控制谐波抑制混频器的方法和装置
公开(公告)号：US07860480B2
公开(公告)日：2010-12-28
申请号：US11824418
申请日：2007-06-29
申请人： Aslamali A. Rafi , Alessandro Piovaccari
发明人： Aslamali A. Rafi , Alessandro Piovaccari
IPC分类号： H04B1/26
CPC分类号： H04B1/16 , H03D7/1441 , H03D7/1458 , H03D7/1483 , H03D2200/0025 , H03D2200/0084 , H03D2200/0086 , H04N5/455
摘要： In one embodiment, the present invention includes a method for receiving a radio frequency (RF) signal and mixing the RF signal with a master clock to obtain a mixed signal, cyclically rotating the mixed signal to each of N gain stages for at least one cycle of the master clock, and summing the outputs of the N gain stages to provide an output signal.
摘要翻译：在一个实施例中，本发明包括一种用于接收射频（RF）信号并将RF信号与主时钟混合以获得混合信号的方法，将混合信号周期性地旋转至N个增益级中的每一个至少一个周期并且对N个增益级的输出进行求和以提供输出信号。

53. 发明授权

US07321324B2 Unconditionally stable analog-to-digital converter 失效
标题翻译：无条件稳定的模数转换器
公开(公告)号：US07321324B2
公开(公告)日：2008-01-22
申请号：US11270908
申请日：2005-11-10
申请人： Alessandro Piovaccari
发明人： Alessandro Piovaccari
IPC分类号： H03M3/00
CPC分类号： H03M3/442
摘要： In one embodiment, the present invention includes a delta-sigma modulator formed of a loop filter coupled to receive an incoming signal, and a quantizer coupled to the loop filter to receive an output of the loop filter and to generate a quantized output. The loop filter may have multiple integration stages and a transfer function constrained to maintain stability of the delta-sigma modulator regardless of an amplitude of the incoming signal. Methods directed to design of such a delta-sigma modulator are also described.
摘要翻译：在一个实施例中，本发明包括由耦合到接收输入信号的环路滤波器形成的Δ-Σ调制器，以及耦合到环路滤波器以接收环路滤波器的输出并产生量化输出的量化器。环路滤波器可以具有多个积分级，并且传输函数被约束以维持Δ-Σ调制器的稳定性，而与输入信号的幅度无关。还描述了针对这种Δ-Σ调制器的设计的方法。

54. 发明申请

US20070001881A1 Unconditionally stable analog-to-digital converter 失效
标题翻译：无条件稳定的模数转换器
公开(公告)号：US20070001881A1
公开(公告)日：2007-01-04
申请号：US11270908
申请日：2005-11-10
申请人： Alessandro Piovaccari
发明人： Alessandro Piovaccari
IPC分类号： H03M3/00
CPC分类号： H03M3/442
摘要： In one embodiment, the present invention includes a delta-sigma modulator formed of a loop filter coupled to receive an incoming signal, and a quantizer coupled to the loop filter to receive an output of the loop filter and to generate a quantized output. The loop filter may have multiple integration stages and a transfer function constrained to maintain stability of the delta-sigma modulator regardless of an amplitude of the incoming signal. Methods directed to design of such a delta-sigma modulator are also described.
摘要翻译：在一个实施例中，本发明包括由耦合到接收输入信号的环路滤波器形成的Δ-Σ调制器，以及耦合到环路滤波器以接收环路滤波器的输出并产生量化输出的量化器。环路滤波器可以具有多个积分级，并且传输函数被约束以维持Δ-Σ调制器的稳定性，而与输入信号的幅度无关。还描述了针对这种Δ-Σ调制器的设计的方法。

55. 发明授权

US06229289B1 Power converter mode transitioning method and apparatus 有权
标题翻译：电力转换器模式转换方法和装置
公开(公告)号：US06229289B1
公开(公告)日：2001-05-08
申请号：US09513339
申请日：2000-02-25
申请人： Alessandro Piovaccari , Carl A. Ramsey , Eric H. Naviasky
发明人： Alessandro Piovaccari , Carl A. Ramsey , Eric H. Naviasky
IPC分类号： G05F140
CPC分类号： H02M3/1588 , H02M2001/0045 , Y02B70/1466
摘要： A method and apparatus are provided for transitioning a power converter between a switched mode of operation and a linear regulator mode of operation. The power converter operates according to one or more intermediate modes of operation in which the switched mode and linear regulator modes cooperate to produce a shared power converter output. The power converter transitions between the various modes of operation in response to changes in circuit parametric conditions as defined by a series of state transition diagrams. Power converter output voltage is maintained in regulation during all modes of operation and transitions therebetween. The method and apparatus includes an integrated device that may be operated as a switch or a variable resistance device.
摘要翻译：提供了一种用于在切换操作模式和线性调节器操作模式之间转换功率转换器的方法和装置。功率转换器根据其中开关模式和线性调节器模式协作以产生共享功率转换器输出的一种或多种中间工作模式来操作。功率转换器响应于由一系列状态转换图定义的电路参数条件的变化，在各种操作模式之间转变。功率变换器输出电压在所有工作模式和转换期间保持调节。该方法和装置包括可作为开关或可变电阻装置操作的集成装置。

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