公开(公告)号：US20070105515A1

公开(公告)日：2007-05-10

申请号：US10579101

申请日：2004-12-14

申请人： Max Muterspaugh ,  Matthew Mayer

发明人： Max Muterspaugh ,  Matthew Mayer

IPC分类号： H04B7/00

CPC分类号： H04W52/52 ,  H03G3/3052 ,  H04N5/4401 ,  H04N5/46 ,  H04N5/52

摘要： Signal processing apparatus (100) such as a television signal receiver provides automatic gain control (AGC) in a manner that avoids excessive tuner gain reduction and compensates for interference from both analog and digital signals. According to an exemplary embodiment, the signal processing apparatus (100) includes a tuner (10) operative to tune an RF signal to generate an IF signal. A first filter (20) is operative to filter the IF signal to generate a filtered IF signal. An AGC detector (30) is operative to enable generation of an AGC signal for the tuner (10) responsive to the filtered IF signal. The AGC detector (30) includes a second filter (35) operative to attenuate a predetermined carrier frequency.

摘要翻译： 诸如电视信号接收机的信号处理设备（100）以避免过多的调谐器增益降低并补偿来自模拟和数字信号的干扰的方式来提供自动增益控制（AGC）。 根据示例性实施例，信号处理设备（100）包括调谐器（10），用于调谐RF信号以产生IF信号。 第一滤波器（20）用于对IF信号进行滤波以产生经滤波的IF信号。 AGC检测器（30）可操作以响应于滤波的IF信号而产生用于调谐器（10）的AGC信号。 AGC检测器（30）包括用于衰减预定载波频率的第二滤波器（35）。

公开(公告)号：US20050162570A1

公开(公告)日：2005-07-28

申请号：US10512675

申请日：2003-04-25

申请人： Edward Hall ,  Gary Grubbs ,  Michael Pugel ,  Max Muterspaugh

发明人： Edward Hall ,  Gary Grubbs ,  Michael Pugel ,  Max Muterspaugh

IPC分类号： H03J3/22 ,  H03J1/00 ,  H03J3/18 ,  H03J3/20 ,  H04B1/18 ,  H04N5/50 ,  H04N5/52

CPC分类号： H04N5/50 ,  H03J1/0066 ,  H03J3/185 ,  H03J3/20 ,  H03J2200/28 ,  H04N5/52 ,  H04N21/4383 ,  H04N21/44209

摘要： A system, apparatus and/or method provides frequency response adjustment of an RF input filter of an RF tuner based on impedance of an antenna system that is providing reception of RF signals to the RF tuner. The frequency response adjustment is preferably accomplished dynamically and/or with respect to each frequency tuned. Particularly, the system, method and/or apparatus provides compensation at the RF tuner level for mistuning effects produced on the RF tuner by antenna system impedance presented at the antenna input that is other than a designed for impedance. Frequency response of an RF input filter for the RF tuner is electronically adjustable with an independent or semi-independent control voltage signal based on one or more measured parameters of a tuning frequency. Frequency response adjustment may include adjustment of a center frequency of the RF input filter bandpass frequency range and/or altering the bandpass frequency range of the RF input filter. The subject invention expands the capability of an RF signal receiver, particularly one using at least one electronically adjustable RF filter at the input of an electronic alignment type tuner.

摘要翻译： 系统，装置和/或方法基于向RF调谐器提供RF信号的接收的天线系统的阻抗来提供RF调谐器的RF输入滤波器的频率响应调整。 频率响应调整优选地动态地和/或关于调谐的每个频率实现。 特别地，系统，方法和/或设备在RF调谐器级别提供对在RF调谐器上产生的失谐效应的补偿，该天线系统阻抗呈现在除了被设计为阻抗之外的天线输入处。 用于RF调谐器的RF输入滤波器的频率响应可以使用基于调谐频率的一个或多个测量参数的独立或半独立控制电压信号进行电子调节。 频率响应调整可以包括调整RF输入滤波器带通频率范围的中心频率和/或改变RF输入滤波器的带通频率范围。 本发明扩展了RF信号接收机的能力，特别是在电子对准型调谐器的输入处使用至少一个电子可调节RF滤波器的能力。

公开(公告)号：US20060164048A1

公开(公告)日：2006-07-27

申请号：US10509943

申请日：2003-04-02

申请人： Max Muterspaugh

发明人： Max Muterspaugh

IPC分类号： G05F1/10 ,  G05F1/40

CPC分类号： H02M7/2176 ,  H02M1/083

摘要： In a switch mode power supply, a mains supply voltage source is coupled to a rectifier for producing an input supply voltage. The rectified input supply voltage is coupled unfiltered to an input of the SMPS. A switching power transistor having a controllable duty cycle is controlled by a duty cycle modulated signal for producing a regulated output supply voltage from the rectified input supply voltage. The periodic waveform of the mains supply voltage is used to establish the timings of the duty cycle modulated signal. In each cycle, current flow is initiated in the transistor, when the transistor is already fully turned on and a voltage developed between its main current conducting terminals is low or close to zero volts. When the output supply voltage attains the required level the transistor is turned off. Hysteresis is provided for preventing the transistor from turning on again in the same cycle, after it has been turned off.

摘要翻译： 在开关模式电源中，电源电压源耦合到整流器以产生输入电源电压。 经整流的输入电源电压未滤波耦合到SMPS的输入。 具有可控占空比的开关功率晶体管由占空比调制信号控制，用于从整流的输入电源电压产生稳定的输出电源电压。 电源电压的周期波形用于建立占空比调制信号的定时。 在每个周期中，当晶体管已经完全导通并且其主电流导通端子之间产生的电压低或接近零伏特时，在晶体管中引发电流流动。 当输出电源电压达到所需电平时，晶体管关闭。 提供滞后功能，以防止晶体管在关闭后在相同周期内再次导通。

公开(公告)号：US20060038926A1

公开(公告)日：2006-02-23

申请号：US10523484

申请日：2003-08-06

申请人： Matthew Mayer ,  Michael Pugel ,  Max Muterspaugh

发明人： Matthew Mayer ,  Michael Pugel ,  Max Muterspaugh

IPC分类号： H04N5/50

CPC分类号： H04N5/50 ,  H03J1/0091 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/42638 ,  H04N21/4345 ,  H04N21/4383

摘要： A technique for performing channel detection in a device such as a television signal receiver is capable of quickly determining the analog and/or digital broadcast channels available in a given area. According to an exemplary embodiment, a method for performing channel detection includes tuning a first frequency channel, determining whether a signal parameter associated with the first frequency channel exceeds a predetermined threshold, and enabling a first channel acquisition operation responsive to determining that the signal parameter exceeds the predetermined threshold.