-
21.发明授权Dynamic selection of local oscillator signal injection for image rejection in integrated receivers 有权动态选择本地振荡器信号注入用于集成接收机中的图像抑制公开(公告)号：US07272374B2
公开(公告)日：2007-09-18
申请号：US10881579
申请日：2004-06-30
申请人： G. Tyson Tuttle , Dan B. Kasha , Donald A. Kerth
发明人： G. Tyson Tuttle , Dan B. Kasha , Donald A. Kerth
IPC分类号： H04B1/28
CPC分类号： H04B1/10 , H03J1/0041 , H04B1/28
摘要： A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signal. This image rejection assessment provides an advantageous basis upon which to make dynamic high-side versus low-side injection determinations.
摘要翻译： 公开了一种系统和方法，用于基于对输入信号频谱内的信号功率的评估来动态地选择本地振荡器混合信号的高侧注入或低侧注入，这可能导致处理信号中的不需要的图像。 这种镜像抑制评估提供了进行动态高侧对低侧注射测定的有利基础。
-
公开(公告)号：US07158574B2
公开(公告)日：2007-01-02
申请号：US09821340
申请日：2001-03-29
申请人： G. Diwakar Vishakhadatta , Jeffrey W. Scott , G. Tyson Tuttle , Vishnu Shankar Srinivasan , Aslamali A. Rafi
发明人： G. Diwakar Vishakhadatta , Jeffrey W. Scott , G. Tyson Tuttle , Vishnu Shankar Srinivasan , Aslamali A. Rafi
CPC分类号： H04B1/0003 , H04B1/28 , H04B1/406 , H04B15/02
摘要： Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The interface between the receiver analog circuitry and the receiver digital circuitry includes configurable signal lines that function as a serial interface, or as a data and clock signal interface, depending on the state of a control signal.
摘要翻译： 射频（RF）设备包括接收模拟电路，其接收RF信号并且向与接收机模拟电路协作起作用的接收机数字电路提供至少一个数字信号。 接收器模拟电路和接收机数字电路之间的接口包括用作串行接口的可配置信号线，或者根据控制信号的状态作为数据和时钟信号接口。
-
公开(公告)号：US08966233B2
公开(公告)日：2015-02-24
申请号：US12562357
申请日：2009-09-18
申请人： Scott Haban , G. Tyson Tuttle , Gregory A. Hodgson
发明人： Scott Haban , G. Tyson Tuttle , Gregory A. Hodgson
IPC分类号： G06F9/24 , G06F15/177 , G06F9/445
CPC分类号： G06F8/60
摘要： In one aspect, the present invention includes an apparatus having a digital signal processor (DSP), a controller coupled to the DSP to provide control signals to the DSP, and a one-time programmable (OTP) memory coupled to the DSP and the controller. The OTP memory may include multiple code portions including a first code block to control the DSP and a second code block to control the controller.
-
公开(公告)号：US08346198B2
公开(公告)日：2013-01-01
申请号：US11171817
申请日：2005-06-30
IPC分类号： H04B1/18
CPC分类号： H03F3/45183 , H03F2203/45362
摘要： In one embodiment, the present invention includes an amplifier having a transistor stage coupled between a supply voltage and a bias current. The transistor stage has an input to receive a radio frequency (RF) input signal obtained from an antenna. The amplifier has an input impedance that is unmatched to a source impedance of the antenna. In some embodiments, this unmatched input impedance may be substantially greater than the source impedance, and may further be controlled based on a strength of the RF input signal.
摘要翻译： 在一个实施例中，本发明包括具有耦合在电源电压和偏置电流之间的晶体管级的放大器。 晶体管级具有用于接收从天线获得的射频（RF）输入信号的输入。 放大器具有与天线的源阻抗无法匹配的输入阻抗。 在一些实施例中，这种不匹配的输入阻抗可以基本上大于源阻抗，并且还可以基于RF输入信号的强度进行控制。
-
公开(公告)号：US07941102B2
公开(公告)日：2011-05-10
申请号：US11931656
申请日：2007-10-31
申请人： Donald A. Kerth , Richard T. Behrens , Jeffrey W. Scott , G. Diwakar Vishakhadatta , G. Tyson Tuttle , Vishnu Shankar Srinivasan
发明人： Donald A. Kerth , Richard T. Behrens , Jeffrey W. Scott , G. Diwakar Vishakhadatta , G. Tyson Tuttle , Vishnu Shankar Srinivasan
IPC分类号： H04B1/40
CPC分类号： H04B1/109 , H04B1/0003 , H04B1/28 , H04B1/406 , H04B15/02 , H04B15/04 , H04B2215/064 , H04L27/2649
摘要： Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The receiver analog circuitry and the receiver digital circuitry are partitioned so that interference effects between the receiver analog circuitry and the receiver digital circuitry tend to be reduced.
摘要翻译： 射频（RF）设备包括接收模拟电路，其接收RF信号并且向与接收机模拟电路协作起作用的接收机数字电路提供至少一个数字信号。 接收机模拟电路和接收机数字电路被分割，使得接收机模拟电路和接收机数字电路之间的干扰效应趋于降低。
-
公开(公告)号：US07702307B2
公开(公告)日：2010-04-20
申请号：US11374533
申请日：2006-03-13
IPC分类号： H04B17/00
CPC分类号： H04B1/1027 , H04B17/336
摘要： A frequency modulation (FM) radio receiver includes a processing unit that may generate a magnitude value corresponding to a signal strength of each of a plurality of digital samples of a received FM signal. The receiver also includes a noise estimation unit that may filter the magnitude values using a high pass filter and may generate a noise value representative of a noise portion of the received FM signal based upon the filtered magnitude values.
摘要翻译： 一种频率调制（FM）无线电接收机包括一个处理单元，该处理单元可产生对应于所接收的FM信号的多个数字样本中的每一个的信号强度的幅度值。 接收机还包括噪声估计单元，该噪声估计单元可以使用高通滤波器对幅度值进行滤波，并且可以基于滤波的幅值产生代表所接收的FM信号的噪声部分的噪声值。
-
公开(公告)号：US07667542B2
公开(公告)日：2010-02-23
申请号：US12069604
申请日：2008-02-12
CPC分类号： H04B1/18 , H03F3/45183
摘要： In one embodiment, the present invention includes an amplifier having an input to receive a radio frequency (RF) signal from an output node of a source. An input stage coupled to the amplifier input may include one or more components to aid in processing of incoming signals. One such component coupled between the source and the input of the amplifier is a coupling capacitor used to maintain a bias voltage of the amplifier at a different potential than a DC voltage of the output node. In certain applications, the amplifier and the coupling capacitor may be integrated on a single substrate.
摘要翻译： 在一个实施例中，本发明包括具有用于从源的输出节点接收射频（RF）信号的输入的放大器。 耦合到放大器输入的输入级可以包括一个或多个组件以帮助处理输入信号。 耦合在放大器的源极和输入之间的一个这样的部件是用于将放大器的偏置电压保持在与输出节点的直流电压不同的电位的耦合电容器。 在某些应用中，放大器和耦合电容器可以集成在单个衬底上。
-
公开(公告)号：US20090170463A1
公开(公告)日：2009-07-02
申请号：US12005513
申请日：2007-12-27
IPC分类号： H04B1/10
摘要： In one embodiment, the present invention includes a method for digitizing a phase noise value indicative of a level of phase noise present in a LO signal and downconverting an RF signal to a second frequency signal using the LO signal. This downconversion can cause the phase noise to be transferred to the second frequency signal. The method may thus further include removing the phase noise from the second frequency signal using the digitized phase noise value.
摘要翻译： 在一个实施例中，本发明包括一种数字化表示LO信号中存在的相位噪声电平的相位噪声值并使用LO信号将RF信号下变频为第二频率信号的方法。 该下变频可导致相位噪声被传送到第二频率信号。 因此，该方法可以进一步包括使用数字化相位噪声值从第二频率信号中去除相位噪声。
-
公开(公告)号：US20080160947A1
公开(公告)日：2008-07-03
申请号：US11648413
申请日：2006-12-29
IPC分类号： H04B1/06
CPC分类号： H03G3/3068
摘要： A radio receiver such as a frequency modulation (FM) receiver, for example, includes a radio frequency (RF) amplifier having an adjustable gain output. The RF amplifier may be configured to receive and amplify an incoming RF signal. The receiver also includes an intermediate frequency (IF) amplifier having an adjustable gain output. The IF amplifier may be configured to receive and amplify an IF signal that corresponds to the RF signal. The receiver also includes a gain control unit that is coupled to the RF amplifier and the IF amplifier. The gain control unit may be configured to independently adjust the gain of each of the RF amplifier and the IF amplifier, dependent upon a peak output level of both the RF amplifier and the IF amplifier.
摘要翻译： 诸如调频（FM）接收机的无线电接收机例如包括具有可调增益输出的射频（RF）放大器。 RF放大器可以被配置为接收和放大输入RF信号。 接收机还包括具有可调增益输出的中频（IF）放大器。 IF放大器可以被配置为接收和放大对应于RF信号的IF信号。 接收机还包括耦合到RF放大器和IF放大器的增益控制单元。 增益控制单元可以被配置为根据RF放大器和IF放大器的峰值输出电平独立地调节每个RF放大器和IF放大器的增益。
-
公开(公告)号：US07355476B2
公开(公告)日：2008-04-08
申请号：US11171042
申请日：2005-06-30
IPC分类号： H03G3/10
CPC分类号： H04B1/18 , H03F3/45183
摘要： In one embodiment, the present invention includes an amplifier having an input to receive a radio frequency (RF) signal from an output node of a source. An input stage coupled to the amplifier input may include one or more components to aid in processing of incoming signals. One such component coupled between the source and the input of the amplifier is a coupling capacitor used to maintain a bias voltage of the amplifier at a different potential than a DC voltage of the output node. In certain applications, the amplifier and the coupling capacitor may be integrated on a single substrate.
-
-
-
-
-
-
-
-
-
搜索结果
66 条记录 (耗时 0.033 秒)
