公开(公告)号：US08358993B2

公开(公告)日：2013-01-22

申请号：US11881019

申请日：2007-07-25

申请人： Philip Quinlan ,  Miguel Chanca ,  Hyman Shanan ,  Vincent Foley

发明人： Philip Quinlan ,  Miguel Chanca ,  Hyman Shanan ,  Vincent Foley

IPC分类号： H04B1/18 ,  H04B1/10

CPC分类号： H03D7/18 ,  H04B1/28

摘要： Image rejection calibration includes initializing the calibration mode by applying to quadrature mixers, in place of the wanted RF input, an RF source in the frequency range of the wanted RF input, sensing the power output from the poly-phase filter, developing gain adjust and phase adjust correction values in response to the power output and adjusting in accordance with the correction values the gain of the quadrature signals from the quadrature mixers to the poly-phase filter and the phase of local oscillator quadrature signals from the local oscillator to the quadrature mixers to reduce the power output.

摘要翻译： 图像抑制校准包括通过应用正交混频器代替所需的RF输入，在所需RF输入的频率范围内的RF源，感测来自多相滤波器的功率输出，显影增益调整和 响应于功率输出的相位调整校正值，并且根据校正值来调整来自正交混频器到多相滤波器的正交信号的增益以及从本地振荡器到正交混频器的本地振荡器正交信号的相位 以减少功率输出。

公开(公告)号：US20110086605A1

公开(公告)日：2011-04-14

申请号：US12576630

申请日：2009-10-09

申请人： Miguel Chanca ,  Ronan Casey ,  Patrick Crowley ,  Muhammad Khan ,  Philip Quinlan

发明人： Miguel Chanca ,  Ronan Casey ,  Patrick Crowley ,  Muhammad Khan ,  Philip Quinlan

IPC分类号： H04B1/10

CPC分类号： H04B1/30

摘要： Embodiments of a system for calibrating the image rejection of a receiver include an image-rejection correction circuit that modifies the gain and phase of a first channel of a baseband image signal. The image-rejection correction circuit may include a summing circuit and first and second variable-gain elements. In one implementation, a filter receives a corrected first channel from the image-rejection correction circuit and an unmodified second channel of the image signal, while a controller analyzes power measured at the output of the filter, and adjusts the variable-gain elements to reduce the power of the image signal.

摘要翻译： 用于校准接收机的图像抑制的系统的实施例包括修改基带图像信号的第一通道的增益和相位的图像拒绝校正电路。 图像抑制校正电路可以包括求和电路和第一和第二可变增益元件。 在一个实现中，滤波器从图像抑制校正电路和图像信号的未修改的第二通道接收校正的第一通道，而控制器分析在滤波器的输出处测量的功率，并且调整可变增益元件以减少 图像信号的功率。

公开(公告)号：US20080132191A1

公开(公告)日：2008-06-05

申请号：US11881019

申请日：2007-07-25

申请人： Philip Quinlan ,  Miguel Chanca ,  Hyman Shanan ,  Vincent Foley

发明人： Philip Quinlan ,  Miguel Chanca ,  Hyman Shanan ,  Vincent Foley

IPC分类号： H04B1/10

CPC分类号： H03D7/18 ,  H04B1/28

摘要： Image rejection calibration includes initializing the calibration mode by applying to quadrature mixers, in place of the wanted RF input, an RF source in the frequency range of the wanted RF input, sensing the power output from the poly-phase filter, developing gain adjust and phase adjust correction values in response to the power output and adjusting in accordance with the correction values the gain of the quadrature signals from the quadrature mixers to the poly-phase filter and the phase of local oscillator quadrature signals from the local oscillator to the quadrature mixers to reduce the power output.

摘要翻译： 图像抑制校准包括通过应用正交混频器代替所需的RF输入，在所需RF输入的频率范围内的RF源，感测来自多相滤波器的功率输出，显影增益调整和 响应于功率输出的相位调整校正值，并且根据校正值来调整来自正交混频器到多相滤波器的正交信号的增益以及从本地振荡器到正交混频器的本地振荡器正交信号的相位 以减少功率输出。

公开(公告)号：US20130050132A1

公开(公告)日：2013-02-28

申请号：US13218788

申请日：2011-08-26

申请人： Javier Calpe Maravilla ,  Alberto Marinas ,  Santiago Iriarte ,  Enrique Company Bosch ,  Miguel Chanca ,  Reza Alavi ,  Vladimir Friedman ,  John Cleary

发明人： Javier Calpe Maravilla ,  Alberto Marinas ,  Santiago Iriarte ,  Enrique Company Bosch ,  Miguel Chanca ,  Reza Alavi ,  Vladimir Friedman ,  John Cleary

IPC分类号： G06F3/045

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。

公开(公告)号：US08238865B2

公开(公告)日：2012-08-07

申请号：US12576630

申请日：2009-10-09

申请人： Miguel Chanca ,  Ronan Casey ,  Patrick Crowley ,  Muhammad Khan ,  Philip Quinlan

发明人： Miguel Chanca ,  Ronan Casey ,  Patrick Crowley ,  Muhammad Khan ,  Philip Quinlan

IPC分类号： H04B1/10

CPC分类号： H04B1/30

摘要： Embodiments of a system for calibrating the image rejection of a receiver include an image-rejection correction circuit that modifies the gain and phase of a first channel of a baseband image signal. The image-rejection correction circuit may include a summing circuit and first and second variable-gain elements. In one implementation, a filter receives a corrected first channel from the image-rejection correction circuit and an unmodified second channel of the image signal, while a controller analyzes power measured at the output of the filter, and adjusts the variable-gain elements to reduce the power of the image signal.

摘要翻译： 用于校准接收机的图像抑制的系统的实施例包括修改基带图像信号的第一通道的增益和相位的图像拒绝校正电路。 图像抑制校正电路可以包括求和电路和第一和第二可变增益元件。 在一个实现中，滤波器从图像抑制校正电路和图像信号的未修改的第二通道接收校正的第一通道，而控制器分析在滤波器的输出处测量的功率，并且调整可变增益元件以减少 图像信号的功率。