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81. 发明授权

US06229991B1 Method of and apparatus for automatic frequency control range extension 失效
标题翻译：自动频率控制范围扩展的方法和装置
公开(公告)号：US06229991B1
公开(公告)日：2001-05-08
申请号：US09170768
申请日：1998-10-13
申请人： Alexander W. Hietala , Arvind S. Arora
发明人： Alexander W. Hietala , Arvind S. Arora
IPC分类号： H04B1700
CPC分类号： H03J1/0033 , H03J7/045
摘要： By employing AFC range extension, a high frequency communication device (100) can use a low cost, low accuracy crystal (119) in its reference oscillator (118). AFC range extension involves varying receive bandwidth of the communication device (100) to facilitate AFC or automatic frequency control. In particular, the receive bandwidth is set to a first, wide setting for AFC acquisition purposes (208). Frequency error associated with a received AFC signal is determined (212) and receive reception is adjusted (218) to reduce frequency error in the communication device (100). Once the frequency error is below a predetermined threshold (214), the receive bandwidth is set to a second setting different from the first setting for normal reception (220).
摘要翻译：通过采用AFC范围扩展，高频通信设备（100）可以在其参考振荡器（118）中使用低成本，低精度晶体（119）。 AFC范围扩展涉及通信设备（100）的变化的接收带宽以便于AFC或自动频率控制。特别地，接收带宽被设置为用于AFC获取目的的第一广泛设置（208）。确定与接收的AFC信号相关联的频率误差（212），并且调整接收接收（218）以减少通信设备（100）中的频率误差。一旦频率误差低于预定阈值（214），则将接收带宽设置为与正常接收的第一设置不同的第二设置（220）。

82. 发明授权

US5933059A Method and apparatus for controlling frequency synchronization in a radio telephone 失效
标题翻译：用于控制无线电话中的频率同步的方法和装置
公开(公告)号：US5933059A
公开(公告)日：1999-08-03
申请号：US956163
申请日：1997-10-22
申请人： Ramanathan Asokan
发明人： Ramanathan Asokan
IPC分类号： H03J1/00 , H03J7/04 , H04L27/00 , H04L27/227 , H04L27/06
CPC分类号： H03J7/045 , H03J1/0008 , H04L27/2273 , H04L2027/0016
摘要： A method and apparatus for controlling frequency synchronization in a frequency correction feedback loop of a radio telephone. A processor in a frequency update controller ascertains increment/decrement values pro-proportionally related to confidence levels representing a ratio that a likelihood probability of estimated offset frequecies of an input carrier signal are accurate in proportion to a likelihood probability that the estimated offset frequencies are inaccurate. The processor adds or subtracts the value to a counter depending on its sign. When the counter reaches a certain predefined positive number, the counter is decremented by this number and the processor increases the frequency of a reference oscillator frequency. When the counter reaches a certain predefined negative number, the counter is incremented by the absolute value of the negative number and the processor decreases the frequency of the reference oscillator frequency.
摘要翻译：一种用于控制无线电话的频率校正反馈回路中的频率同步的方法和装置。频率更新控制器中的处理器确定与置信水平成比例地相关的增量/减量值，其表示输入载波信号的估计偏移频率的似然概率与估计的偏移频率不准确的似然概率成正比的准确比。处理器根据其符号将值添加或减去计数器。当计数器达到一定的预定正数时，计数器减少这个数字，并且处理器增加参考振荡器频率的频率。当计数器达到一定的预定负数时，计数器增加负数的绝对值，处理器降低参考振荡器频率的频率。

83. 发明授权

US3577008A Automatic frequency control apparatus 失效
标题翻译：自动频率控制装置
公开(公告)号：US3577008A
公开(公告)日：1971-05-04
申请号：US3577008D
申请日：1969-01-22
申请人： RCA CORP
发明人： CRAFT JACK
IPC分类号： H04N5/50 , H03D3/00 , H03J7/02 , H03J7/04 , H03L7/02 , H03K5/20
CPC分类号： H03J7/045
摘要： Automatic frequency control apparatus including a differential amplifier-detector biased so as to be responsive only to signals exceeding a predetermined amplitude value established to effectively reduce undesired pull-in of adjacent signal frequencies.

84. 发明授权

US3459887A Automatic frequency control system 失效
公开(公告)号：US3459887A
公开(公告)日：1969-08-05
申请号：US3459887D
申请日：1966-04-11
申请人： ZENITH RADIO CORP
发明人： BAKER ROY F
IPC分类号： H03J7/04 , H04N3/16 , H04N5/50
CPC分类号： H03J7/045

85. 发明授权

US2622191A Receiver circuit arrangement 失效
标题翻译：接收机电路布置
公开(公告)号：US2622191A
公开(公告)日：1952-12-16
申请号：US18076250
申请日：1950-08-22
申请人： HARTFORD NAT BANK & TRUST CO
发明人： ZELST JOHANNES JACOBUS ZAALBER , MEYER CLUWEN JOHANNES
IPC分类号： H03D7/14 , H03J7/04
CPC分类号： H03J7/045 , H03D7/1416

86. 发明授权

US2383848A Reactance control circuit 失效
标题翻译：电抗控制电路
公开(公告)号：US2383848A
公开(公告)日：1945-08-28
申请号：US47707243
申请日：1943-02-25
申请人： RCA CORP
发明人： CROSBY MURRAY G
IPC分类号： H03J7/04
CPC分类号： H03J7/045

87. 发明授权

US2100733A Automatic frequency control 失效
公开(公告)号：US2100733A
公开(公告)日：1937-11-30
申请号：US9186436
申请日：1936-07-22
申请人： HAZELTINE CORP
发明人： CASE NELSON P
IPC分类号： H03J7/04
CPC分类号： H03J7/045

88. 发明公开

KR1020140042643A ＤＣＸＯ 및 ＲＦＰＬＬ을 이용한 하이브리드 ＡＦＣ有权
标题翻译：混合AFC使用DCXO和RF PLL
公开(公告)号：KR1020140042643A
公开(公告)日：2014-04-07
申请号：KR1020130072424
申请日：2013-06-24
申请人： 브로드콤 코포레이션
发明人： 메히오,라미 , 카리지,마소드 , 드비어,코버스 , 부야닌,마이클
IPC分类号： H04L25/06 , H03L7/08
CPC分类号： H03L7/18 , H03J7/045 , H03J7/065 , H03J2200/10
摘要： Provided is hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to control the overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. A second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remains after performing the compensation in the DCXO. [Reference numerals] (201) Transmitter(Tx); (202) Receiver(RX); (203) T/R or duplexer; (205) Baseband module; (206) Memory; (210) AFC correction; (213) Draft and fine capacity control; (230) Application module(host); (AA) Crystal reference
摘要翻译：提供了用于校正来自数字控制晶体振荡器（DCXO）的参考频率输出中的漂移的混合补偿。向DCXO提供第一补偿以控制由控制参考频率输出漂移的电容器阵列中的开关电容引起的参考频率的重叠或不连续性。在从DCXO接收参考频率信号的锁相环（PLL）获得第二补偿。第二个补偿调整PLL，以调整在DCXO中执行补偿后剩余的参考频率的变化。（201）发射机（Tx）; （202）接收器（RX）; （203）T / R或双工器; （205）基带模块; （206）记忆; （210）AFC校正; （213）草案和精细的能力管理; （230）应用模块（主机）; （AA）晶体参考

89. 发明公开

KR1020050021884A 튜너용 신호 처리 회로 失效
标题翻译：信号处理电路，用于调谐器根据中频和载波频率之间的频率执行信号处理
公开(公告)号：KR1020050021884A
公开(公告)日：2005-03-07
申请号：KR1020040067798
申请日：2004-08-27
申请人： 산요덴키가부시키가이샤
发明人： 사이또야스지 , 다이라마사아끼 , 히라꼬소유따까
IPC分类号： H04L27/02 , H04B1/10
CPC分类号： H03J7/045
摘要： PURPOSE: A signal processing circuit for a tuner is provided to prevent degradation of demodulation property by performing a signal processing according to a frequency drift between an IF(Intermediate Frequency) and a carrier frequency. CONSTITUTION: A wave detector(16) is operated based on a clock signal from a second local oscillator and detects an IF signal. A frequency drift detector(40) detects drift of a carrier of the IF signal and a frequency of the clock signal and outputs an IF frequency drift signal. The frequency drift detector includes a detector BPF(Band Pass Filter)(42), a frequency counter(44), and an IF frequency drift signal output unit(46). The detector BPF detects a carrier component of the IF signal. The frequency counter counts the frequency of the carrier of the IF signal passing through the detector BPF based on the clock signal. The IF frequency drift signal output unit outputs an IF frequency drift signal according to a difference between the counted frequency and the frequency of the clock signal.
摘要翻译：目的：提供一种用于调谐器的信号处理电路，以通过根据IF（中频）和载波频率之间的频率漂移执行信号处理来防止解调特性的劣化。构成：基于来自第二本地振荡器的时钟信号操作波检测器（16），并检测IF信号。频率漂移检测器（40）检测IF信号的载波的漂移和时钟信号的频率，并输出IF频率漂移信号。频率漂移检测器包括检测器BPF（带通滤波器）（42），频率计数器（44）和IF频率漂移信号输出单元（46）。检测器BPF检测IF信号的载波分量。频率计数器根据时钟信号对通过检测器BPF的IF信号的载波的频率进行计数。 IF频率漂移信号输出单元根据计数频率和时钟信号的频率之间的差输出IF频率漂移信号。

90. 发明公开

KR1020060132126A 이동체 ＴＶ 수신 모듈 및 그 안테나 밴드 제어방법 失效
标题翻译：用于手机的电视接收模块及其控制天线的方法
公开(公告)号：KR1020060132126A
公开(公告)日：2006-12-21
申请号：KR1020050052276
申请日：2005-06-17
申请人： 삼성전기주식회사
发明人： 이용군
IPC分类号： H04N5/50 , H04B1/40
CPC分类号： H04N5/50 , H03J7/045 , H04N5/455 , H04N5/52
摘要： A TV receiving module for a mobile body and a method for controlling an antenna band thereof are provided to perform RF AGC and IF AGC according to RF and IF levels and control a receiving band of an antenna while monitoring an IF level, thereby improving receiving sensitivity for a broadband TV signal. A TV(Television) receiving module comprises the followings: an RF(Radio Frequency) circuit part(100) which amplifies an RF signal from a receiving band variable antenna and converting the RF signal into an IF(Intermediate Frequency) signal; an IF circuit part(200) which amplifies the IF signal from the RF circuit part(100); an RF level detecting part(300) which detects a level of the RF signal; an IF level detecting part(400) which detects a level of the IF signal; an AGC(Automatic Gain Control) circuit part(500) which performs RF AGC and IF AGC according to detected RF and IF levels; and an antenna control part(600) which controls a band variation of the antenna according to the IF level.
摘要翻译：提供了一种用于移动体的电视接收模块和一种用于控制其天线频带的方法，用于根据RF和IF电平执行RF AGC和IF AGC，并在监控IF电平的同时控制天线的接收频带，从而提高接收灵敏度用于宽带电视信号。电视（电视）接收模块包括：RF（射频）电路部分（100），其放大来自接收频带可变天线的RF信号，并将RF信号转换成IF（中频）信号; IF电路部分（200），其放大来自RF电路部分（100）的IF信号; RF电平检测部（300），其检测RF信号的电平; 检测IF信号的电平的IF电平检测部（400）根据检测到的RF和IF电平执行RF AGC和IF AGC的AGC（自动增益控制）电路部分（500）; 以及根据IF电平控制天线的频带变化的天线控制部（600）。

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