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公开(公告)号：US20060068746A1
公开(公告)日：2006-03-30
申请号：US10956778
申请日：2004-09-30
申请人： Shen Feng , Madjid Hafizi , Qizheng Gu , Robert Ruth , Richard Schwab , Taoling Fu , Kim Schulze , Per Karlsen
发明人： Shen Feng , Madjid Hafizi , Qizheng Gu , Robert Ruth , Richard Schwab , Taoling Fu , Kim Schulze , Per Karlsen
CPC分类号： H04B1/30
摘要： An integrated circuit includes an RF receiver has a direct-conversion down-converter and demodulator architecture with an integrated low noise amplifier (LNA) for operation in a frequency band of interest (cellular) and provisions for an off-chip LNA for operation in a second (higher) frequency band of interest (such as PCS). A baseband processor includes high-dynamic variable gain amplifiers and 7th-order elliptic low-pass filters. The IC also includes a 4 GHz PLL frequency synthesizer and a three wire series interface to external digital baseband circuits, such as a digital signal processor.
摘要翻译： 一种集成电路包括RF接收机，其具有用于在感兴趣的频带（蜂窝）中操作的集成低噪声放大器（LNA）的直接转换下变频器和解调器架构，并且为片外LNA提供操作 感兴趣的第二（更高）频带（例如PCS）。 基带处理器包括高动态可变增益放大器和7阶椭圆低通滤波器。 该IC还包括一个4 GHz PLL频率合成器和一个三线串行接口，用于外部数字基带电路，如数字信号处理器。
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公开(公告)号：US20050287965A1
公开(公告)日：2005-12-29
申请号：US10876194
申请日：2004-06-24
申请人： Qizheng Gu
发明人： Qizheng Gu
CPC分类号： H04W52/52
摘要： Disclosed is a method to operate a RF transmitter, and an RF transmitter constructed to operate in accordance with the method. The method includes determining a transmitter output power and varying a level of a signal at a transmitter phase modulator according to the transmitter output power so as to increase the level of the signal as the transmitter output power increases and to decrease the level of the signal as the transmitter output power decreases. In the preferred embodiment the method further includes adjusting the current consumption of a plurality of components of an RF transmitter chain in accordance with at least one of the level of the signal and the gain of the stage.
摘要翻译： 公开了一种操作RF发射机的方法，以及被构造为根据该方法操作的RF发射机。 该方法包括根据发射机输出功率确定发射机输出功率和改变发射机相位调制器处的信号电平，以便随着发射机输出功率的增加而增加信号的电平，并将信号的电平降低为 变送器输出功率降低。 在优选实施例中，该方法还包括根据信号的电平和级的增益中的至少一个来调整RF发射器链的多个部件的电流消耗。
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公开(公告)号：US07327775B1
公开(公告)日：2008-02-05
申请号：US09471857
申请日：1999-12-23
申请人： Qizheng Gu
发明人： Qizheng Gu
CPC分类号： H04B1/707 , H04B1/692 , H04B2201/70709 , H04L5/026
摘要： A signal reception method including method and apparatus for receiving a signal, down converting the received signal through multi-tone down conversion to form an intermediate signal, and decoding the intermediate signal to extract data. In an embodiment, the received signal may include multiple transmission bands of a multi-code (MC)-CDMA signal, each of which occupies a different spectrum. Each of the transmission bands also includes an information channel signal. When the received MC-CDMA signal is down converted through multi-tone down conversion, the intermediate signal is formed. The intermediate signal includes a common spectrum that includes an information channel from a plurality of transmission bands. When the intermediate signal is decoded, data from a plurality of information channel bands is extracted. The method and apparatus may be implemented in a multi-mode MC-CDMA/CDMA receiver.
摘要翻译： 一种信号接收方法，包括用于接收信号的方法和装置，通过多音降下转换下变频接收信号以形成中间信号，以及解码中间信号以提取数据。 在一个实施例中，接收的信号可以包括多码（MC）-CDMA信号的多个传输频带，每个信号占用不同的频谱。 每个传输频带还包括信息信道信号。 当接收到的MC-CDMA信号通过多音调降频转换被下变频时，形成中间信号。 中间信号包括包含来自多个传输频带的信息信道的公共频谱。 当解码中间信号时，提取来自多个信息频带的数据。 该方法和装置可以在多模MC-CDMA / CDMA接收机中实现。
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公开(公告)号：US06631170B1
公开(公告)日：2003-10-07
申请号：US09454326
申请日：1999-12-03
申请人： Qizheng Gu
发明人： Qizheng Gu
IPC分类号： H03K900
CPC分类号： H04B1/0007 , H04B1/0003 , H04B1/28 , H04B1/30 , H04B1/707
摘要： An RF signal reception method includes mixing a received signal and a local oscillator signal to form a down converted signal. The down converted signal formed from the received signal is a modulated non-zero low frequency carrier referred to as a low frequency carrier desired signal. The low frequency carrier desired signal is extracted from undesired signals and interferers by using low or band-pass filters and the resulting signal is AC coupled to low frequency amplifiers for amplification. A digital representation of the low frequency carrier desired signal is then formed by digitally sampling at an analog-to-digital converter. The digitized desired signal may be further processed by digital signal processing devices for obtaining voice and/or data messages.
摘要翻译： RF信号接收方法包括混合接收信号和本地振荡器信号以形成降频转换信号。 由接收信号形成的下变频信号是被称为低频载波期望信号的被调制的非零低频载波。 通过使用低通或带通滤波器从不期望的信号和干扰源中提取低频载波期望信号，并且所得到的信号被AC耦合到低频放大器用于放大。 然后通过在模拟 - 数字转换器进行数字采样来形成低频载波期望信号的数字表示。 数字化的期望信号可以被数字信号处理设备进一步处理，以获得语音和/或数据消息。
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5.发明授权MEMS tunable notch filter frequency automatic control loop systems and methods 有权MEMS可调陷波滤波器频率自动控制回路系统及方法公开(公告)号：US08810331B2
公开(公告)日：2014-08-19
申请号：US13323485
申请日：2011-12-12
CPC分类号： H03H7/0153 , H03H9/547 , H03H9/6409 , H03H2007/008 , H03H2007/013 , H04B1/525
摘要： Tunable notch filters and control loop systems and methods can include a tunable notch filter providing a stop band, a sensing circuit in communication with the tunable notch filter and adapted to determine a phase change between a reference signal and a signal reflected from the tunable notch filter, and a control loop in communication with the tunable notch filter and the sensing circuit, the control loop being operable to adjust the tunable notch filter to modify the phase change.
摘要翻译： 可调陷波滤波器和控制回路系统和方法可以包括提供阻带的可调陷波滤波器，与可调陷波滤波器通信的感测电路，并且适于确定参考信号和从可调陷波滤波器反射的信号之间的相位变化 以及与可调谐陷波滤波器和感测电路通信的控制回路，控制回路可操作以调节可调陷波滤波器以修改相位变化。
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6.发明申请MEMS TUNABLE NOTCH FILTER FREQUENCY AUTOMATIC CONTROL LOOP SYSTEMS AND METHODS 有权MEMS TUNABLE NOTCH滤波器频率自动控制环路系统和方法公开(公告)号：US20120286892A1
公开(公告)日：2012-11-15
申请号：US13323485
申请日：2011-12-12
CPC分类号： H03H7/0153 , H03H9/547 , H03H9/6409 , H03H2007/008 , H03H2007/013 , H04B1/525
摘要： Tunable notch filters and control loop systems and methods can include a tunable notch filter providing a stop band, a sensing circuit in communication with the tunable notch filter and adapted to determine a phase change between a reference signal and a signal reflected from the tunable notch filter, and a control loop in communication with the tunable notch filter and the sensing circuit, the control loop being operable to adjust the tunable notch filter to modify the phase change.
摘要翻译： 可调陷波滤波器和控制回路系统和方法可以包括提供阻带的可调陷波滤波器，与可调陷波滤波器通信的感测电路，并且适于确定参考信号和从可调陷波滤波器反射的信号之间的相位变化 以及与可调谐陷波滤波器和感测电路通信的控制回路，控制回路可操作以调节可调陷波滤波器以修改相位变化。
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公开(公告)号：US07664520B2
公开(公告)日：2010-02-16
申请号：US10876194
申请日：2004-06-24
申请人： Qizheng Gu
发明人： Qizheng Gu
CPC分类号： H04W52/52
摘要： Disclosed is a method to operate a RF transmitter, and an RF transmitter constructed to operate in accordance with the method. The method includes determining a transmitter output power and varying a level of a signal at a transmitter phase modulator according to the transmitter output power so as to increase the level of the signal as the transmitter output power increases and to decrease the level of the signal as the transmitter output power decreases. In the preferred embodiment the method further includes adjusting the current consumption of a plurality of components of an RF transmitter chain in accordance with at least one of the level of the signal and the gain of the stage.
摘要翻译： 公开了一种操作RF发射机的方法，以及被构造为根据该方法操作的RF发射机。 该方法包括根据发射机输出功率确定发射机输出功率和改变发射机相位调制器处的信号电平，以便随着发射机输出功率的增加而增加信号的电平，并将信号的电平降低为 变送器输出功率降低。 在优选实施例中，该方法还包括根据信号的电平和级的增益中的至少一个来调整RF发射器链的多个部件的电流消耗。
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8.发明授权Apparatus, and an associated method, for increasing receiver sensitivity of a direct conversion receiver 失效用于增加直接转换接收机的接收机灵敏度的装置和相关方法公开(公告)号：US06950641B2
公开(公告)日：2005-09-27
申请号：US10356405
申请日：2003-01-31
申请人： Qizheng Gu
发明人： Qizheng Gu
CPC分类号： H03G3/3068 , H04B1/30
摘要： Apparatus, and an associated method, for a direct conversion receiver by which to selectably increase the sensitivity of the receiver. The direct conversion receiver includes a baseband amplifier positioned in front of a baseband filter, and coupled to receive a direct-converted baseband signal. The gain at which the baseband amplifier amplifies the signal provided thereto is selected, in combination with gains applied to other amplification elements of the direct conversion receiver to distribute the gain across the receive chain. When a signal received at the receiver includes a large interfering signal component, the gain of the baseband amplifier is reduced to lessen the possibility that the amplified signal become saturated. A gain controller controls the gain of the amplification elements.
摘要翻译： 一种直接转换接收机的装置及相关方法，通过该接收机可选地增加接收机的灵敏度。 直接转换接收机包括位于基带滤波器前面的基带放大器，并被耦合以接收直接转换的基带信号。 选择基带放大器放大提供给它的信号的增益，以及施加到直接转换接收机的其他放大元件的增益结合在接收链上分配增益。 当在接收机处接收的信号包括大的干扰信号分量时，降低基带放大器的增益以减小放大的信号饱和的可能性。 增益控制器控制放大元件的增益。
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公开(公告)号：US08797119B2
公开(公告)日：2014-08-05
申请号：US13212856
申请日：2011-08-18
IPC分类号： H03H7/38
CPC分类号： H03H7/40 , H03H2260/00
摘要： Methods for tuning a tunable matching network can involve comparing a source impedance of a source to a real part of a load impedance of a load. Depending on characteristics of the network, capacitances of one or more tunable capacitors can be set to correspond to device boundary parameters, and capacitances of remaining tunable capacitors can be set based on a predetermined relationship between the parameters of the capacitors, the source, the load, and other components. From these initially determined values, the capacitance value of one or more of the capacitors can be adjusted to fall within device boundary conditions and achieve a perfect or at least best match tuning configuration.
摘要翻译： 用于调谐可调谐匹配网络的方法可以包括将源的源阻抗与负载的负载阻抗的实部进行比较。 根据网络的特性，可以将一个或多个可调电容器的电容设置为对应于器件边界参数，并且可以基于电容器的参数，源，负载之间的预定关系来设置剩余可调谐电容器的电容 ，和其他组件。 从这些初始确定的值，可以调整一个或多个电容器的电容值以落入器件边界条件，并实现完美或至少最佳匹配调谐配置。
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公开(公告)号：US20120119842A1
公开(公告)日：2012-05-17
申请号：US13212856
申请日：2011-08-18
IPC分类号： H03H7/40
CPC分类号： H03H7/40 , H03H2260/00
摘要： Methods for tuning a tunable matching network can involve comparing a source impedance of a source to a real part of a load impedance of a load. Depending on characteristics of the network, capacitances of one or more tunable capacitors can be set to correspond to device boundary parameters, and capacitances of remaining tunable capacitors can be set based on a predetermined relationship between the parameters of the capacitors, the source, the load, and other components. From these initially determined values, the capacitance value of one or more of the capacitors can be adjusted to fall within device boundary conditions and achieve a perfect or at least best match tuning configuration.
摘要翻译： 用于调谐可调谐匹配网络的方法可以包括将源的源阻抗与负载的负载阻抗的实部进行比较。 根据网络的特性，可以将一个或多个可调电容器的电容设置为对应于器件边界参数，并且可以基于电容器的参数，源，负载之间的预定关系来设置剩余可调谐电容器的电容 ，和其他组件。 从这些初始确定的值，可以调整一个或多个电容器的电容值以落入器件边界条件，并实现完美或至少最佳匹配调谐配置。
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