专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

81. 发明申请

US20050062532A1 Method for aligning feed forward loops 有权
标题翻译：用于对齐前馈回路的方法
公开(公告)号：US20050062532A1
公开(公告)日：2005-03-24
申请号：US10668912
申请日：2003-09-23
申请人： Mark Gurvich , Nikolai Maslennikov , Alexander Rabinovich , Bill Vassilakis
发明人： Mark Gurvich , Nikolai Maslennikov , Alexander Rabinovich , Bill Vassilakis
IPC分类号： H03F20060101 , H03F1/00 , H03F1/32 , H03F3/189
CPC分类号： H03F1/3229 , H03F1/3223 , H03F3/189 , H03F2201/3212
摘要： A method for aligning a feed forward radio frequency power amplifier includes applying a radio frequency signal to the feed forward radio frequency power amplifier and monitoring a radio frequency signal from the feed forward radio frequency power amplifier, without opening a break point of the feed forward radio frequency amplifier.
摘要翻译：用于对准前馈射频功率放大器的方法包括将射频信号施加到前馈射频功率放大器，并且监视来自前馈射频功率放大器的射频信号，而不打开前馈无线电的断点频率放大器。

82. 发明申请

US20050052248A1 ELEVATED FRONT-END TRANSIMPEDANCE AMPLIFIER 失效
标题翻译：高端前端放大放大器
公开(公告)号：US20050052248A1
公开(公告)日：2005-03-10
申请号：US10657088
申请日：2003-09-09
申请人： Pasqualino Visocchi
发明人： Pasqualino Visocchi
IPC分类号： H03F1/00 , H03F3/08
CPC分类号： H03F3/08
摘要： Transimpedance amplifiers (TIAs) are typically used within optical receiver modules to amplify weak photocurrents received from the photodetector. The TIA amplifies this weak photocurrent into an output voltage that is further provided to other stages of the optical receiver module. Since TIAs are used to amplify weak photocurrents, noise in the resultant amplification of the weak photocurrent is typically a problem. However, TIAs must not only provide low noise amplification of weak photocurrents, but must also operate when a much higher optical power is received by the photodetector and hence a much higher photocurrent is provided to an input port of the TIA. An elevated front end TIA (EFTIA) is thus provided that offers low noise performance while providing a wide dynamic range, which overcomes the deficiencies of the prior art. Furthermore, the EFTIA is provided absent a transistor switching circuit.
摘要翻译：互阻放大器（TIA）通常用在光接收器模块内以放大从光电检测器接收的弱光电流。 TIA将该弱光电流放大成进一步提供给光接收器模块的其它级的输出电压。由于TIAs用于放大弱光电流，因此弱光电流的最终放大中的噪声通常是一个问题。然而，TIAs不仅必须提供弱光电流的低噪声放大，而且还必须在光电检测器接收到更高的光功率时工作，因此向TIA的输入端口提供更高的光电流。因此提供了一种提高的前端TIA（EFTIA），其提供低噪声性能，同时提供宽的动态范围，其克服了现有技术的缺陷。而且，缺少晶体管开关电路的EFTIA被提供。

83. 发明申请

US20050036635A1 Audio signal output device 审中-公开
标题翻译：音频信号输出装置
公开(公告)号：US20050036635A1
公开(公告)日：2005-02-17
申请号：US10914277
申请日：2004-08-10
申请人： Ryosuke Inagaki
发明人： Ryosuke Inagaki
IPC分类号： H03F3/68 , H03F1/00 , H03F1/26 , H03F1/30 , H03F3/181 , H03F3/30 , H03F99/00 , H03F21/00
CPC分类号： H03F1/308 , H03F3/3018 , H03F3/3064
摘要： An audio signal output device that suppresses the effect of noise from the digital IC via the power supply and that permits reduced costs is provided. The audio signal output device comprises a regulator capable of a stabilized supply of power regardless of the noise from the digital IC. The first input stage amplifier, to which an audio signal is inputted and the second input stage amplifier, which inverts the output of the first output stage amplifier, employ the output of the regulator as a power supply source, while the first and second output stage amplifiers, which drive the speaker and consume a large amount of electrical power, employ the power supply voltage (Vdd) directly as a power supply source.
摘要翻译：提供一种通过电源抑制来自数字IC的噪声影响并且允许降低成本的音频信号输出装置。音频信号输出装置包括能够稳定地供电的调节器，而与来自数字IC的噪声无关。输入音频信号的第一输入级放大器和使第一输出级放大器的输出反相的第二输入级放大器采用调节器的输出作为电源，而第一和第二输出级驱动扬声器并消耗大量电力的放大器直接将电源电压（Vdd）用作电源。

84. 发明授权

US06850115B2 Enhanced efficiency LDMOS based feed forward amplifier 有权
标题翻译：增强效率LDMOS前馈放大器
公开(公告)号：US06850115B2
公开(公告)日：2005-02-01
申请号：US10633984
申请日：2003-08-04
申请人： Mark Gurvich , Nikolai Maslennikov
发明人： Mark Gurvich , Nikolai Maslennikov
IPC分类号： H03F1/02 , H03F1/26 , H03F1/32 , H03F1/00
CPC分类号： H03F1/3247 , H03F1/0266 , H03F1/26 , H03F1/3223 , H03F1/3229 , H03F2200/102
摘要： A feed forward amplifier employing high efficiency main and/or error amplifiers with amplifier devices biased in a lower bias class. Small signal nonlinearities in the gain response of the amplifier devices are compensated by a small signal gain adjustment circuit. The resulting gain response is substantially linear over the entire usable range of RF input power.
摘要翻译：一种使用高效率主放大器和/或误差放大器的前馈放大器，其放大器器件偏置在较低的偏置等级。放大器器件的增益响应中的小信号非线性由小信号增益调整电路补偿。所得增益响应在RF输入功率的整个可用范围内基本上是线性的。

85. 发明授权

US6104241A High efficiency feed-forward RF power amplifier with predistoration enchancement 有权
标题翻译：具有预失真增强功能的高效率前馈RF功率放大器
公开(公告)号：US6104241A
公开(公告)日：2000-08-15
申请号：US356166
申请日：1999-07-16
申请人： Armando C. Cova , Lance T. Mucenieks
发明人： Armando C. Cova , Lance T. Mucenieks
IPC分类号： H03F3/68 , H03F1/00 , H03F1/26 , H03F1/32 , H03F3/20 , H04B1/04 , H04K1/02
CPC分类号： H03F1/32 , H03F1/3223 , H03F1/3247 , H03F2201/3215
摘要： An RF power amplifier linearization architecture contains main and auxiliary path RF amplifiers. A distortion-inverting circuit extracts the distortion component from the output signal of the main amplifier and combines it with a delayed sample of the RF input signal to drive an auxiliary path RF amplifier, via a predistorter. An output quadrature hybrid combines the output of the main and auxiliary path amplifiers. The cascading of the distortion-inverting circuit with the predistorter compensates for the non-linear behavior of the auxiliary path RF power amplifier thereby producing a composite signal at the output quadrature hybrid, in which RF carrier components from each amplifier combine constructively while distortion components cancel.
摘要翻译： RF功率放大器线性化架构包含主路径和辅助路径RF放大器。失真反相电路从主放大器的输出信号中提取失真分量，并将其与RF输入信号的延迟采样相结合，以通过预失真器驱动辅助路径RF放大器。输出正交混合组合主路径和辅助路径放大器的输出。失真反相电路与预失真器的级联补偿辅助路径RF功率放大器的非线性行为，从而在输出正交混合器处产生复合信号，其中来自每个放大器的RF载波分量在构造上组合而失真分量取消。

86. 发明授权

US5986499A Pilot signal detection system using band reject filter 有权
标题翻译：导频信号检测系统采用带阻滤波器
公开(公告)号：US5986499A
公开(公告)日：1999-11-16
申请号：US217637
申请日：1998-12-21
申请人： Robert Evan Myer
发明人： Robert Evan Myer
IPC分类号： H03F1/32 , H03F3/66 , H03F1/00
CPC分类号： H03F1/3229
摘要： A pilot signal detection system uses a band reject filter to reject the frequency band of at least one carrier signal to improve pilot signal detection. For example, in a feed forward distortion reduction system, the carrier signal(s) is on a main signal path along with a pilot signal which is injected into the main signal path at a frequency adjacent to the frequency band of the carrier signal(s). The carrier signal(s) and the pilot signal are amplified on the main signal path, resulting in distortion on the main signal path. To reduce the distortion from the main signal path, the feed forward distortion reduction system detects and reduces the pilot signal. To improve detection of the pilot signal, the pilot signal detection system provides a signal representative of the carrier signal(s) and the pilot signal with distortion from the main signal path onto a pilot detection path. A band reject filter on the pilot detection path rejects the frequency band of the carrier signal(s) while allowing the frequency of the pilot signal to pass through to pilot detect circuitry. Without the presence of the carrier signal(s), the pilot detect circuitry can more accurately detect the pilot signal on the pilot detection path. In response to the detected pilot signal, the pilot detect circuitry can provide control signal(s) to improve the reduction of the pilot signal by changing the relative phase and/or gain between the signals on the main signal path and the feed forward path. Thus, by improving the detection of the pilot signal, the pilot detection system improves the reduction of the pilot signal and thereby of the distortion.
摘要翻译：导频信号检测系统使用带阻滤波器来拒绝至少一个载波信号的频带，以改善导频信号检测。例如，在前馈失真减小系统中，载波信号与导频信号一起在主信号路径上，该导频信号以与载波信号的频带相邻的频率被注入主信号路径）。载波信号和导频信号在主信号路径上放大，导致主信号路径失真。为了减少主信号路径的失真，前馈失真减少系统检测并降低导频信号。为了提高导频信号的检测，导频信号检测系统提供表示载波信号和导频信号的信号，该信号具有从主信号路径到导频检测路径的失真。导频检测路径上的带阻滤波器拒绝载波信号的频带，同时允许导频信号的频率通过导频检测电路。在没有载波信号的情况下，导频检测电路可以更精确地检测导频检测路径上的导频信号。响应于检测到的导频信号，导频检测电路可以通过改变主信号路径和前馈路径上的信号之间的相对相位和/或增益来提供控制信号以改善导频信号的减小。因此，通过改善导频信号的检测，导频检测系统改善导频信号的减少，从而改善失真。

87. 发明授权

US5903190A Amplifier feedforward arrangement and method for enhanced frequency response 失效
标题翻译：用于增强频率响应的放大器前馈布置和方法
公开(公告)号：US5903190A
公开(公告)日：1999-05-11
申请号：US889910
申请日：1997-07-10
申请人： Milton Luther Embree , Robert Frederick Lee
发明人： Milton Luther Embree , Robert Frederick Lee
IPC分类号： H03F3/343 , H03F3/345 , H03F1/00 , H03F3/68
CPC分类号： H03F3/345 , H03F3/3437
摘要： Embodiments of the invention include an amplifier having an enhanced feedforward arrangement. In a typical operational amplifier output stage of this type, conventional feedforward arrangements comprise one or more active electrical components coupled between the second stage amplifying transistor and the negative output driver. The enhanced feedforward arrangement includes a resistor connected between the second stage amplifying transistor and the negative voltage source and a second resistor connected between the second stage amplifying transistor and the negative output driver. Alternatively, a capacitor is connected in parallel with the second resistor. In this manner, feedforward arrangements according to embodiments of the invention advantageously provide stable, enhanced frequency response, including high frequency response, e.g., above approximately 10 kHz, using economically advantageous passive rather than active electrical components. Furthermore, feedforward arrangements according to embodiments of the invention typically require less components than conventional feedforward arrangements, making them further advantageous from an economic standpoint.
摘要翻译：本发明的实施例包括具有增强的前馈布置的放大器。在这种典型的运算放大器输出级中，常规的前馈布置包括耦合在第二级放大晶体管和负输出驱动器之间的一个或多个有源电气元件。增强的前馈装置包括连接在第二级放大晶体管和负电压源之间的电阻器以及连接在第二级放大晶体管和负输出驱动器之间的第二电阻器。或者，电容器与第二电阻器并联连接。以这种方式，根据本发明的实施例的前馈布置有利地使用经济上有利的被动而不是有源电气部件来提供稳定的，增强的频率响应，包括高频响应，例如高于大约10kHz。此外，根据本发明的实施例的前馈布置通常比常规的前馈布置要求较少的组件，从经济的观点来看，其进一步有利。

88. 发明授权

US5877928A Electronic circuit device 失效
标题翻译：电子电路装置
公开(公告)号：US5877928A
公开(公告)日：1999-03-02
申请号：US905220
申请日：1997-08-01
申请人： Hiroshi Makino
发明人： Hiroshi Makino
IPC分类号： H01L27/04 , G05F3/20 , H01L21/822 , H02J1/00 , H02M9/04 , H03F1/00 , H03K19/00 , H02H3/20
CPC分类号： H03K19/0008 , Y10T307/406 , Y10T307/445
摘要： First and second terminals between which a predetermined source voltage is applied and between which are connected, a plurality of electronic circuit blocks connected in series, and a plurality of semiconductor devices which are turned on when voltages exceeding predetermined threshold voltages thereof are applied thereto. The sum of threshold voltages of the plurality of semiconductor devices is higher than the source voltage. The semiconductor devices are forward-connected in series between the first terminal and the second terminal, wherein connection points among the plurality of electronic circuit blocks connected in series are connected to selected connection points among the plurality of semiconductor devices connected in series so that at least one of the semiconductor devices is connected in parallel in respective one of the plurality of electronic circuit blocks.
摘要翻译：第一和第二端子之间施加了预定的源极电压并且在其间连接，串联连接的多个电子电路块以及当施加超过其预定阈值电压时导通的多个半导体器件。多个半导体器件的阈值电压之和高于源极电压。半导体器件串联在第一端子和第二端子之间，其中串联连接的多个电子电路块中的连接点连接到串联连接的多个半导体器件中的选定的连接点，使得至少半导体器件中的一个在多个电子电路块的相应一个中并联连接。

89. 发明授权

US5825251A Audio signal amplifying circuit 失效
标题翻译：音频信号放大电路
公开(公告)号：US5825251A
公开(公告)日：1998-10-20
申请号：US759952
申请日：1996-12-03
申请人： Eiji Nakagawa
发明人： Eiji Nakagawa
IPC分类号： H03F1/00 , H03F3/21 , H03F3/72 , H03G3/34 , H03F1/14 , H04B15/00
CPC分类号： H03F1/305 , H03F3/72 , H03G3/348
摘要： An audio signal amplifying circuit includes a switch circuit disposed between a first power source line and a second power source line for bootstrapping, and a capacitor for bootstrapping disposed between the second power source line and a line to which an output terminal is connected. The switch circuit is controlled from ON to OFF upon receiving a muting signal, and is provided with a first switch circuit constituted by Darlington connected transistors having an NPN type transistor as the output stage thereof and a second switch circuit constituted by a PNP type transistor disposed in parallel with the NPN type transistor. The sum of the rated current values of the NPN type transistor in the first switch circuit and the rated current value of the PNP type transistor in the second switch circuit is selected to be equal to or more than the maximum supply current value for the second power source line, and the rated current of the PNP type transistor in the second switch circuit is selected to be smaller than the rated current values of the transistors in the first switch circuit.
摘要翻译：音频信号放大电路包括设置在第一电源线和用于自举的第二电源线之间的开关电路，以及设置在第二电源线与输出端子连接的线路之间的自举电容器。开关电路在接收到静噪信号时由ON变为OFF，并且具有由具有NPN型晶体管作为其输出级的Darlington连接的晶体管构成的第一开关电路和由配置在PNP型晶体管上的PNP型晶体管构成的第二开关电路与NPN型晶体管并联。选择第一开关电路中的NPN型晶体管的额定电流值与第二开关电路中的PNP型晶体管的额定电流值之和等于或大于第二功率的最大供给电流值源极线，并且第二开关电路中的PNP型晶体管的额定电流被选择为小于第一开关电路中的晶体管的额定电流值。

90. 发明授权

US5523712A Resistor array circuit device and variable gain device utilizing same 失效
标题翻译：电阻阵列电路器件和利用其的可变增益器件
公开(公告)号：US5523712A
公开(公告)日：1996-06-04
申请号：US399310
申请日：1995-03-06
申请人： Satoru Miyabe , Akira Toyama , Minoru Takeda
发明人： Satoru Miyabe , Akira Toyama , Minoru Takeda
IPC分类号： H03F1/00 , H03G1/00 , H03G3/00 , H03G3/02 , H03G3/10 , H03G3/12
CPC分类号： H03G1/0088 , H03G3/001
摘要： To provide a resistor array circuit device and variable gain device which make possible precise setting of attenuation factors and the like as well as prevention of generation of gridge noise, a resistor array circuit device has resistors R1.sub.1 to R1.sub.n-1, each with a resistance value R, resistors R2.sub.1 to R2.sub.n, each with a resistance value aR, resistor R3 having a resistance value (l+b)R, switches SW.sub.1 to SW.sub.n for switching connection of resistors R2.sub.1 to R2.sub.n to a terminal T3 or a terminal T4, and a control circuit for controlling switches SW.sub.1 to SW.sub.n so that resistors R2.sub.1 to R2.sub.m-1 on a terminal T1 side of an arbitrary resistor R2.sub.m are connected to terminal T4 and resistors R2.sub.m to R2.sub.n on a terminal T2 side of resistor R2.sub.m are connected to terminal T3, the values of the a and b being determined based on b={-1+(1+4a).sup.1/2 }/2 and 1/2
摘要翻译：为了提供可以精确设定衰减因子等的电阻阵列电路装置和可变增益装置，并且防止产生格栅噪声，电阻阵列电路装置具有电阻器R11至R1n-1，每个电阻值具有电阻值 R，具有电阻值aR的电阻器R21〜R2n，具有电阻值（1 + b）R的电阻器R3，将用于将电阻器R21〜R2n的连接切换到端子T3或端子T4的SW1〜SWn，以及用于控制开关SW1至SWn的控制电路，使得任意电阻器R2m的端子T1侧上的电阻器R21至R2m-1连接到端子T4，并且电阻器R2m的端子T2侧上的电阻器R2m至R2n连接到端子T3，基于b = { - 1+（1 + 4a）1/2} / 2和1/2

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式