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1. 发明申请

WO2022020278A1 DETERMINING LO LEAKAGE AND QUADRATURE ERROR PARAMETERS OF AN RF FRONT END 审中-公开
公开(公告)号：WO2022020278A1
公开(公告)日：2022-01-27
申请号：PCT/US2021/042265
申请日：2021-07-20
申请人： ANALOG DEVICES, INC.
发明人： ALAVI, Reza , RUAN, Adam , LIU, Yupeng
IPC分类号： H04B1/06 , H04K3/00
摘要： The present disclosure provides a method and a system to estimate LO leakage and quadrature error parameters for a transmitter RF front end, such as a direct up-conversion transmitter RF front end, in a joint fashion. The proposed method utilizes a PN sequence inserted at the transmitter baseband. At the observation receiver side, an RX accumulator is implemented to sum receiver signals to take advantage of a despreading gain using the same PN sequence from transmitter side. Through the despreading process, the receiver-transmitter channel may be estimated and used to extract the quadrature error parameters. The estimated channel may also be used to eliminate user data interference presented within the RX accumulator output, which may further be used to compute the LO leakage.

2. 发明申请

WO2013032798A1 TECHNIQUES FOR CAPACITIVE TOUCH SCREEN CONTROL 审中-公开
标题翻译：电容触摸屏控制技术
公开(公告)号：WO2013032798A1
公开(公告)日：2013-03-07
申请号：PCT/US2012/051792
申请日：2012-08-22
申请人： ANALOG DEVICES, INC. , CALPE MARAVILLA, Javier , MARINAS, Alberto , IRIARTE, Santiago , COMPANY BOSCH, Enrique , CHANCA, Miguel , ALAVI, Reza , FRIEDMAN, Vladimir , CLEARY, John
发明人： CALPE MARAVILLA, Javier , MARINAS, Alberto , IRIARTE, Santiago , COMPANY BOSCH, Enrique , CHANCA, Miguel , ALAVI, Reza , FRIEDMAN, Vladimir , CLEARY, John
IPC分类号： G06F3/041
CPC分类号： G06F3/044 , G06F1/3262 , G06F3/0418
摘要： Techniques to control a capacitive touch screen that decrease processing time and increase noise rejection. The techniques may include injecting a plurality of excitation signals having unique spectral profiles onto conductors of the capacitive touch screen, sampling signals returned from the screen, and determining a location of touch. The techniques may further include injecting a plurality of excitation signals having unique spectral profiles onto adjacent or non-adjacent conductors of the capacitive touch screen. The techniques may further include injecting a plurality of excitation signals having unique spectral profiles onto conductors of the capacitive touch screen in unequal measures. The techniques may also include mapping frequency characteristics of noise present on the capacitive touch screen.
摘要翻译：用于控制电容式触摸屏的技术，其减少处理时间并增加噪声抑制。这些技术可以包括将具有独特光谱轮廓的多个激励信号注入到电容式触摸屏的导体上，从屏幕返回的采样信号以及确定触摸的位置。这些技术可以进一步包括将具有唯一光谱轮廓的多个激励信号注入到电容式触摸屏的相邻或非相邻导体上。这些技术可以进一步包括以不相等的措施将具有独特光谱分布的多个激励信号注入到电容式触摸屏的导体上。这些技术还可以包括映射存在于电容式触摸屏上的噪声的频率特性。

3. 发明申请

WO2016164479A1 CIRCUITS AND SYSTEMS FOR TRANSMITTER CALIBRATION 审中-公开
标题翻译：发射机校准的电路和系统
公开(公告)号：WO2016164479A1
公开(公告)日：2016-10-13
申请号：PCT/US2016/026244
申请日：2016-04-06
申请人： ANALOG DEVICES, INC.
发明人： ALAVI, Reza , AGHTAR, Saeed , KEYES, Kenneth, J.
IPC分类号： H04B1/50
CPC分类号： H04B1/525 , H04B1/123 , H04B17/14
摘要： A method of operating a radio frequency transceiver may include generating, by a transmit circuit of the transceiver, in-phase (I) and quadrature (Q) analog signals based on a digital calibration signal; mixing, by the transmit circuit, the I and Q analog signals with local oscillator (LO) and phase shifted LO signals to generate upconverted I and Q signals, the LO signal having a first frequency, and combining the upconverted I and Q signals to generate a combined signal; and converting, by a receive circuit of the transceiver, a signal based on the combined signal to a received digital signal using a sampling rate at a second frequency, the second frequency being less than the first frequency, wherein the converting downconverts frequency content in the combined signal.
摘要翻译：操作射频收发器的方法可以包括：基于数字校准信号，由收发器的发射电路产生同相（I）和正交（Q）模拟信号; 通过发送电路将本地振荡器（LO）和相移LO信号的I和Q模拟信号混合以产生上变频的I和Q信号，LO信号具有第一频率，并组合上变频的I和Q信号以产生组合信号以及通过所述收发器的接收电路，使用第二频率的采样率将基于所述组合信号的信号转换为接收到的数字信号，所述第二频率小于所述第一频率，其中所述转换将所述频率内容转换为组合信号。

4. 发明申请

WO2012149123A1 RF AGC CONTROL 审中-公开
标题翻译： RF AGC控制
公开(公告)号：WO2012149123A1
公开(公告)日：2012-11-01
申请号：PCT/US2012/035148
申请日：2012-04-26
申请人： ANALOG DEVICES, INC. , ALAVI, Reza , AGHTAR, Saeed , STEINBRECHER, Christoph , SUNDARESAN, Arathi
发明人： ALAVI, Reza , AGHTAR, Saeed , STEINBRECHER, Christoph , SUNDARESAN, Arathi
IPC分类号： H04L27/08
CPC分类号： H03F3/189 , H03F3/45475 , H03F3/45932 , H03F2200/294 , H03G1/0029 , H03G1/007 , H03G1/0088 , H03G3/3052
摘要： Embodiments of the present invention may provide a signal processor with a wide gain range. The signal processor may comprise at least a discrete step gain stage and a continuous variable gain amplifier (VGA) stage. The discrete step gain stage may comprise a programmable gain amplifier (PGA) (e.g., low noise amplifiers 1 and 2 (LNAl and LNA2)). The VGA stage may provide a continuous range to compensate the LNAs gain steps. In one embodiment, the AGC controller enables an inherent hysteresis with the AGC step change if required.
摘要翻译：本发明的实施例可以提供具有宽增益范围的信号处理器。信号处理器可以包括至少离散步进增益级和连续可变增益放大器（VGA）级。离散步进增益级可以包括可编程增益放大器（PGA）（例如，低噪声放大器1和2（LNA1和LNA2））。 VGA级可以提供连续的范围来补偿LNA的增益步骤。在一个实施例中，如果需要，AGC控制器实现具有AGC步长变化的固有滞后。

5. 发明申请

WO2010091064A1 METHOD FOR TRANSMITTING SAMPLED DATA AND CONTROL INFORMATION BETWEEN A DSP AND AN RF/ANALOG FRONT-END 审中-公开
标题翻译：用于发送DSP和RF /模拟前端之间的采样数据和控制信息的方法
公开(公告)号：WO2010091064A1
公开(公告)日：2010-08-12
申请号：PCT/US2010/023012
申请日：2010-02-03
申请人： ANALOG DEVICES, INC. , FRIEDMAN, Vladimir , ALAVI, Reza , HORMIS, Raju , MONTREUIL, Leo
发明人： FRIEDMAN, Vladimir , ALAVI, Reza , HORMIS, Raju , MONTREUIL, Leo
IPC分类号： H04L25/00 , H04L27/00
CPC分类号： H04L12/2838 , H03M13/093 , H04L1/0057 , H04L2012/2849
摘要： A method for delivering control information together with sampled data between a DSP and an RF/analog front-end in a high speed communication modem, which embeds sampled data and control information in frames to be transferred over one interface. A frame may comprise various fields, each may consist of one or more bytes or octets. The frame may have a data field for carrying the sampled data, and at least one control field for transferring the control information to update RF/analog front-end registers. The control field may include an octet containing a control address, an octet containing a control command, and an octet containing control data. The frame may also provide means of synchronization, e.g., by using a sync field to identify the frame boundary.
摘要翻译：一种用于在高速通信调制解调器中的DSP和RF /模拟前端之间传送控制信息以及采样数据的方法，该方法将采样数据和控制信息嵌入到要通过一个接口传送的帧中。帧可以包括各种字段，每个字段可以由一个或多个字节或八位组组成。帧可以具有用于承载采样数据的数据字段，以及用于传送控制信息以更新RF /模拟前端寄存器的至少一个控制字段。控制字段可以包括包含控制地址的八位字节，包含控制命令的八位字节和包含控制数据的八位位组。该帧还可以提供同步的方式，例如通过使用同步字段来识别帧边界。

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