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公开(公告)号：EP2824834A1
公开(公告)日：2015-01-14
申请号：EP13757744.1
申请日：2013-02-28
Applicant: Yamaha Corporation
Inventor： OKABAYASHI, Masaaki , HAGIWARA, Hideki , AISO, Masaru
CPC classification number: H03G3/20 , H03G3/04 , H03G3/10 , H03G3/3005 , H03G2201/103 , H03M1/18 , H04H60/04 , H04R3/00 , H04R29/007 , H04R29/008 , H04R2420/01 , H04R2430/01
Abstract: While level of the inputted analog signal is adjusted according to a set analog gain value and then analog-digital converted and outputted, when an automatic compensation is on and a difference of the analog gain value and a target value is compensated by level adjustment in a digital amplifier, the analog gain value is displayed by a gain knob (161), and in response to an operation to turn on the automatic compensation, a present value of the analog gain value at that time is displayed as a target gain value by a mark (162a) near the analog gain value, and in response to an operation to turn off the automatic compensation, display of the target gain value is erased.
Abstract translation: 当输入的模拟信号的电平根据设定的模拟增益值进行调整然后进行模数转换和输出时，当自动补偿打开并且模拟增益值与目标值的差通过电平调整补偿 数字放大器，通过增益旋钮（161）显示模拟增益值，并且响应于打开自动补偿的操作，此时的模拟增益值的当前值被显示为目标增益值a 标记（162a）接近模拟增益值，并且响应于关闭自动补偿的操作，目标增益值的显示被擦除。
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72.发明授权
公开(公告)号：EP1428313B1
公开(公告)日：2010-07-14
申请号：EP02759314.4
申请日：2002-08-12
Applicant: HARRIS CORPORATION
Inventor： POGGI, Peter, John , DITTMER, Timothy , CABRERA, George
IPC: H03F3/04
CPC classification number: H03G3/3042 , H03F1/0222 , H03F1/0233 , H03F1/0244 , H03F1/0277 , H03F3/211 , H03G3/004 , H03G2201/103 , H03G2201/504 , H03G2201/508 , H03G2201/702
Abstract: The variable power supply (12) to an amplifier (10) in an electrical circuit is dynamically controlled through the use of a lookup table (14) responsive to one or more operating conditions of the electrical circuit. The lookup table is indexed by one or more of the operating conditions and the amount of amplification to be applied to an input signal to the amplifier is determined. One embodiment of the invention comprises a television transmitter circuit including a power amplifier circuit capable of amplifying a variable frequency COFDM or 8VSB input signal (11) where the amount of amplification applied to the input signal is dynamically controlled through the use of a lookup table as a function of the frequency of the input signal.
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73.发明授权
公开(公告)号：EP1568192B1
公开(公告)日：2009-04-15
申请号：EP03783365.4
申请日：2003-11-14
Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Inventor： OZLUTURK, Fatih , KAZAKEVICH, Leonid , HAQUE, Tanbir , DEMIR, Alpaslan , NARAYAN, Geetha, Lakshmi , KEARNEY, Kenneth
CPC classification number: H03G3/001 , H03D3/008 , H03D3/009 , H03G3/3068 , H03G3/3089 , H03G2201/103 , H03G2201/202 , H03G2201/302 , H03G2201/307 , H03G2201/508 , H04B1/30 , H04L2027/0016 , H04L2027/0024
Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component (105) tolerances of an analog radio (100), a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (110) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency parameters.
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公开(公告)号：EP1653607A4
公开(公告)日：2008-05-28
申请号：EP03817770
申请日：2003-07-30
Applicant: MITSUBISHI ELECTRIC CORP
Inventor： NOGAMI MASAMICHI , NODA MASAKI , TAGAMI HITOYUKI , MOTOSHIMA KUNIAKI
CPC classification number: H03G3/3084 , H03F3/08 , H03G1/0047 , H03G2201/103 , H03G2201/502 , H04B10/69
Abstract: A photodetector (1) converts an optical signal in the form of a burst into an electrical signal and outputs an output current, and a preamplifier (2) having a feedback resistive element (2B) amplifies the output current and outputs a voltage signal. The feedback resistive element (2B), a series circuit of a first resistive element (6) and a first switching element (9), and a series circuit of a second resistive element (7) and a second switching element (10) are connected in parallel to a gain varying circuit (3) for varying the conversion gain of the preamplifier (2). The gain varying circuit (3) generates an operation signal to close the first switching element 9 during a first gain varying period and an operation signal to close the second switching element (10) during a second gain varying period.
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公开(公告)号：EP1787398A2
公开(公告)日：2007-05-23
申请号：EP05798668.9
申请日：2005-09-08
Applicant: Navini Networks, Inc. , Jin, Hang , Grabner, John , Huang, Jun , Ho, Daniel Wee Teck
Inventor： JIN, Hang , GRABNER, John , HUANG, Jun , HO, Daniel, Wee, Teck.
CPC classification number: H03G3/3052 , H03G2201/103 , H03G2201/204 , H03G2201/305 , H03G2201/706
Abstract: The present invention discloses a proactive gain control system (200) for a communications receiver. The proactive gain control system (200) includes a variable gain module (220) for outputting an output signal in response to an input signal. A detector (204) detects the output signal and outputs a detection signal representing a signal strength of the output signal. A traffic monitor (206) monitors the output signal and outputs a traffic profile signal indicating that a traffic profile for the input signal will change. A gain computing module (208) outputs a gain adjustment value in response to the detection signal and the traffic profile signal. A gain control module (210) outputs a gain control signal to the variable gain module (220), which determines a gain between the input and output signals, in response to the gain adjustment value.
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Patent Agency Ranking
公开(公告)号：EP1584169A1
公开(公告)日：2005-10-12
申请号：EP04703677.7
申请日：2004-01-20
Applicant: Thomson Licensing
Inventor： BOUILLET, Aaron , MAYER, Matthew
IPC: H04L27/08
CPC classification number: H03G3/3068 , H03G2201/103 , H03G2201/204 , H03G2201/305 , H03G2201/307
Abstract: A method and apparatus for generating the adaptive gain control signals in a communications receiver is disclosed. The present invention can be used with existing two-stage gain architectures, and overcomes many undesirable characteristics of the previous mechanism. An apparatus is presented wherein each of a plurality of RF AGC gain controllable amplifiers (140 and 150) are individually controlled by individual AGC control signals generated by an AGC controller (105) so that the level of the output signal from each of the RF AGC gain controllable amplifiers is individually optimized for tuner performance (170 and 190).
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77.发明公开
公开(公告)号：EP1542358A1
公开(公告)日：2005-06-15
申请号：EP04029197.3
申请日：2004-12-09
Applicant: NEC CORPORATION
Inventor： Terao, Kenji
IPC: H03G3/30
CPC classification number: H03G3/3078 , H03G3/3068 , H03G2201/103 , H03G2201/202 , H03G2201/302 , H03G2201/307
Abstract: In a slot format of a received signal, AGC gain update timings (t1 to t4) are shifted every time to disperse and reduce an influence of a noise attributable to a direct current component specific to direct conversion which is accompanied by AGC gain update. In particular, in the case where each of slots in the received signal includes an information portion (data) having a larger code correcting capability and an information portion having a smaller code correcting capability (TPC (transmission power control), TFCI (transport format combination indicator), PILOT), the AGC gain update timing is generated while being shifted in the former information portion, thereby reduce the influence of the noise. When the amount of shift of the AGC gain update timing is set to be larger than that of one symbol of the received signal, the influence of the noise accompanied by the AGC gain update is further reduced.
Abstract translation: 在接收信号的时隙格式，AGC增益更新定时（T1到T4）被移位每分散和减少的噪声的影响时间属性能够专用于直接变换的所有直流分量这伴随着AGC增益更新。 特别是，在其中每个在接收信号的时隙包括在具有较大码校正能力和在具有较小的代码校正能力信息部分（TPC（发送功率控制）信息部分（数据）的情况下，TFCI（传输格式组合 指示器），PILOT），则同时在部分前信息被移动产生的AGC增益的更新定时，由此降低噪声的影响。 当AGC增益更新定时的偏移量被设定为比接收信号的一个符号的宽度，由AGC增益更新伴随的噪声的影响进一步减小。
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公开(公告)号：EP1650890B1
公开(公告)日：2012-04-18
申请号：EP03817647.5
申请日：2003-07-25
Applicant: FUJITSU LIMITED
CPC classification number: H03G3/3052 , H03G3/005 , H03G3/3078 , H03G3/3089 , H03G2201/103 , H03G2201/202 , H03G2201/305 , H04B1/707 , H04B2201/70701 , H04B2201/70706
Abstract: A received frame is branched into a gain control system (20A) for common pilot signals and a gain control system (20B) for individual data signals. The gain control system (20A) controls the gain of the common pilot signals, and the gain control system (20B) controls the gain of the data signals. A signal processor (30) establishes synchronization of frames, outputs a gain control signal (g1) so that the gain of the common pilot signal is constant, to a gain control circuit (21a) for the common pilot signals, and outputs a gain control signal (g2) so that the gain of the data signal is constant, to a gain control circuit (21b) for the data signals. The gain is controlled to be constant, thereby preventing saturation of ADC (26a, 26b, 27a, 27b) and S/N deterioration.
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公开(公告)号：EP1787398B1
公开(公告)日：2011-11-02
申请号：EP05798668.9
申请日：2005-09-08
Applicant: Cisco Technology, Inc.
Inventor： JIN, Hang , GRABNER, John , HUANG, Jun , HO, Daniel, Wee, Teck.
CPC classification number: H03G3/3052 , H03G2201/103 , H03G2201/204 , H03G2201/305 , H03G2201/706
Abstract: The present invention discloses a proactive gain control system (200) for a communications receiver. The proactive gain control system (200) includes a variable gain module (220) for outputting an output signal in response to an input signal. A detector (204) detects the output signal and outputs a detection signal representing a signal strength of the output signal. A traffic monitor (206) monitors the output signal and outputs a traffic profile signal indicating that a traffic profile for the input signal will change. A gain computing module (208) outputs a gain adjustment value in response to the detection signal and the traffic profile signal. A gain control module (210) outputs a gain control signal to the variable gain module (220), which determines a gain between the input and output signals, in response to the gain adjustment value.
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公开(公告)号：EP1787398A4
公开(公告)日：2009-06-03
申请号：EP05798668
申请日：2005-09-08
Applicant: CISCO TECH INC
Inventor： JIN HANG , GRABNER JOHN , HUANG JUN , HO DANIEL WEE TECK
CPC classification number: H03G3/3052 , H03G2201/103 , H03G2201/204 , H03G2201/305 , H03G2201/706
Abstract: The present invention discloses a proactive gain control system for a communications receiver. The proactive gain control system includes a variable gain module for outputting an output signal in response to an input signal. A detector detects the output signal and outputs a detection signal representing a signal strength of the output signal. A traffic monitor monitors the output signal and outputs a traffic profile signal indicating that a traffic profile for the input signal will change. A gain computing module outputs a gain adjustment value in response to the detection signal and the traffic profile signal. A gain control module outputs a gain control signal to the variable gain module, which determines a gain between the input and output signals, in response to the gain adjustment value.
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