公开(公告)号：US3422356A

公开(公告)日：1969-01-14

申请号：US3422356D

申请日：1965-06-03

申请人： COLLINS RADIO CO

发明人： FRITTS REX E

IPC分类号： H03C1/02 ,  H04B1/04

CPC分类号： H03C1/02

公开(公告)号：US3060389A

公开(公告)日：1962-10-23

申请号：US80047659

申请日：1959-03-19

申请人： KAHN LEONARD R

发明人： KAHN LEONARD R

IPC分类号： G10L11/00 ,  H03C1/02 ,  H04B3/04

CPC分类号： H04B3/04 ,  G10L25/00 ,  H03C1/02

摘要： 925,855. Transmission systems. L.R.KAHN. March 14, 1960 [March 19, 1959], No. 8987/60. Class 40 (4). A phase-distorting network 26 is used in a carrier wave transmission system to delay to different extents the different component frequencies of an unsymmetrical audio signal 22 from a source 20 without substantially affecting the intelligibility of the signal. The unsymmetrical signal 22 has high positive voltage peaks and low negative voltage peaks. The allpass network, Fig. 2, comprises two transformers 32, 34 and four lattice sections. The phase distortion tends to equalize the positive and negative excursion as in output signal 28 which is fed to a radio transmitter 10. In the network of Fig. 2, the component values of which are specified, frequencies less than 300 c/s. are delayed by delay times in the range 3 to 5 millisecs. Frequencies above 300 c/s. have delay times in the range 0 to 3 millisecs. The network may be designed to delay high frequencies by longer delay times than the low frequencies.

公开(公告)号：US2469264A

公开(公告)日：1949-05-03

申请号：US56569544

申请日：1944-11-29

申请人： RCA CORP

发明人： GOLDBERG EDWIN A

IPC分类号： H03B5/30 ,  H03C1/02

CPC分类号： H03B5/30 ,  H03C1/02

公开(公告)号：US2426193A

公开(公告)日：1947-08-26

申请号：US49113943

申请日：1943-06-17

申请人： RCA CORP

发明人： FERNSLER GEORGE L

IPC分类号： H03C1/02 ,  H03C3/04

CPC分类号： H03C1/02 ,  H03C3/04

公开(公告)号：US2345712A

公开(公告)日：1944-04-04

申请号：US47627643

申请日：1943-02-18

申请人： BELL TELEPHONE LABOR INC

发明人： MOHR MILTON E

IPC分类号： H03C1/02

CPC分类号： H03C1/02

公开(公告)号：US09425741B2

公开(公告)日：2016-08-23

申请号：US14692293

申请日：2015-04-21

申请人： Stryker Combo L.L.C.

发明人： Regis J Nero, Jr. ,  Jeffrey A Gibala

IPC分类号： H03F1/02 ,  H03F3/24 ,  H03F3/19 ,  H03F3/217 ,  H02M1/00

CPC分类号： H03F1/0227 ,  H02M2001/0045 ,  H03C1/02 ,  H03F1/02 ,  H03F3/19 ,  H03F3/217 ,  H03F3/2176 ,  H03F3/245 ,  H03F2200/324 ,  H03F2200/451

摘要： Systems and methods are provided for generating an amplitude modulation signal to a switchmode power amplifier. A DC to DC switch is configured to receive a DC input voltage and to provide a DC output voltage. A low dropout regulator is configured to provide the amplitude modulation signal according to a modulation control signal received by the low dropout regulator. A control circuit is configured to establish a nominal operating power level for the power amplifier via the amplitude modulation signal and to maintain a minimum voltage difference between the DC output voltage and the low dropout regulator output. A modulator control circuit is configured to provide the modulation control signal to the low dropout regulator. The modulator control circuit provides the transition from a high amplitude to a low amplitude and a transition from the low amplitude to the high amplitude at configurable first and second slopes, respectively.

公开(公告)号：US08836446B2

公开(公告)日：2014-09-16

申请号：US13529934

申请日：2012-06-21

申请人： Berardi Sensale-Rodriguez ,  Huili (Grace) Xing ,  Rusen Yan ,  Michelle M. Kelly ,  Tian Fang ,  Debdeep Jena ,  Lei Liu

发明人： Berardi Sensale-Rodriguez ,  Huili (Grace) Xing ,  Rusen Yan ,  Michelle M. Kelly ,  Tian Fang ,  Debdeep Jena ,  Lei Liu

IPC分类号： H03C1/02 ,  H03C7/00

CPC分类号： H03C1/02 ,  H03C7/00

摘要： A wave amplitude modulator for modulating a transmitted electromagnetic wave includes one or multiple self-gated capacitively coupled pair(s) of electron layers such as semiconductor or semimetal layers. Two electrical contacts are placed to each layer of electrons of the self-gated pair(s), and a power source is electrically connected to them. The power source, by varying the voltage applied between layers of electrons, tunes the electron density thereof, thereby adjusting the optical conductivity thereof, and the change in the optical conductivity of the layers of electrons causes an amplitude modulation of the transmitted electromagnetic wave passing through the capacitively coupled layers of electrons.

摘要翻译： 用于调制发射的电磁波的波幅调制器包括一个或多个自门电容耦合的电子层对，例如半导体层或半金属层。 两个电触头被放置到自门控对的每个电子层，并且电源与它们电连接。 电源通过改变施加在电子层之间的电压调谐其电子密度，从而调节其光导率，并且电子层的光导率的变化引起通过的透射电磁波的幅度调制 电容耦合的电子层。

公开(公告)号：US08433267B2

公开(公告)日：2013-04-30

申请号：US13380687

申请日：2010-04-08

申请人： Masakatsu Maeda ,  Taichi Ikedo

发明人： Masakatsu Maeda ,  Taichi Ikedo

IPC分类号： H04B1/04

CPC分类号： H04L27/04 ,  H03C1/02 ,  H03C1/06 ,  H04L27/12

摘要： An amplitude modulator comprises: a signal processing section for receiving a source signal for wide bandwidth use, splitting the source signal into two source signals for lower frequency use and for higher frequency use, respectively, signal processing the two source signals individually, and outputting a lower-frequency-use source signal and a higher-frequency-use source signal; a first modulation section for modulating the lower-frequency-use source signal and outputting a lower-frequency-use modulation signal; a second modulation section for modulating the higher-frequency-use source signal and outputting a higher-frequency-use modulation signal; a synthesis output section for inputting the lower-frequency-use modulation signal to a first input terminal, the input thereof causing extraction of only a lower-frequency component, for inputting the higher-frequency-use modulation signal to a second input terminal, the input thereof causing extraction of only a higher-frequency component, for synthesizing the higher-frequency component and the lower-frequency component, and for outputting a modulated signal corresponding to the source signal for wide bandwidth use, to a next step.

摘要翻译： 振幅调制器包括：信号处理部分，用于接收用于宽带宽使用的源信号，将源信号分别分成用于较低频率使用和较高频率使用的两个源信号，分别对两个源信号进行信号处理，并输出 较低频率的源信号和较高频率的源信号; 第一调制部分，用于调制较低频率使用的源信号并输出​​较低频率的调制信号; 第二调制部分，用于调制高频用途信号并输出​​较高频率的调制信号; 合成输出部分，用于将低频用调制信号输入到第一输入端，其输入仅引起较低频分量，用于将较高频率的调制信号输入到第二输入端， 其输入引起仅提取较高频率分量，用于合成高频分量和较低频分量，并输出对应于用于宽带宽使用的源信号的调制信号到下一步骤。

公开(公告)号：US20100277208A1

公开(公告)日：2010-11-04

申请号：US12235247

申请日：2008-09-22

申请人： Larry W. Fullerton ,  Arthur Bradley ,  Mark D. Roberts

发明人： Larry W. Fullerton ,  Arthur Bradley ,  Mark D. Roberts

IPC分类号： H03B28/00

CPC分类号： H04B1/71632 ,  H03C1/02 ,  H04B1/7172 ,  H04B1/719

摘要： The present invention relates to a method and system that emulates a desired waveform by producing a time profile of the desired waveform, which is characterized by a plurality of sample values, and generating a plurality of RF waveforms, each RF waveform of the plurality of RF waveforms having a polarity and scaled energy based on a corresponding one of the plurality of sample values, to produce an aggregate RF energy having spectral characteristics that approximate the spectral characteristics of the desired waveform.

摘要翻译： 本发明涉及一种通过产生期望波形的时间分布来模拟期望波形的方法和系统，该期望波形的特征在于多个采样值，并且产生多个RF波形，多个RF的每个RF波形 具有基于所述多个样本值中相应的一个样本值的极性和缩放能量的波形，以产生具有近似所需波形的光谱特性的光谱特性的聚合射频能量。

公开(公告)号：US07428258B2

公开(公告)日：2008-09-23

申请号：US10686814

申请日：2003-10-17

申请人： Larry W. Fullerton ,  Arthur T. Bradley ,  Mark D. Roberts

发明人： Larry W. Fullerton ,  Arthur T. Bradley ,  Mark D. Roberts

IPC分类号： H04B1/00

CPC分类号： H04B1/71632 ,  H03C1/02 ,  H04B1/7172 ,  H04B1/719

摘要： The present invention relates to a method and system that emulates a desired waveform by producing a time profile of the desired waveform, which is characterized by a plurality of sample values, and generating a plurality of RF waveforms, each RF waveform of the plurality of RF waveforms having a polarity and scaled energy based on a corresponding one of the plurality of sample values, to produce an aggregate RF energy having spectral characteristics that approximate the spectral characteristics of the desired waveform.

摘要翻译： 本发明涉及一种通过产生期望波形的时间分布来模拟期望波形的方法和系统，该期望波形的特征在于多个采样值，并且产生多个RF波形，多个RF的每个RF波形 具有基于所述多个样本值中相应的一个样本值的极性和缩放能量的波形，以产生具有近似所需波形的光谱特性的光谱特性的聚合射频能量。