公开(公告)号：US08102364B2

公开(公告)日：2012-01-24

申请号：US11598949

申请日：2006-11-13

申请人： Kollin M. Tierling

发明人： Kollin M. Tierling

IPC分类号： G09G5/00 ,  H04R25/00 ,  G06G7/48

CPC分类号： G06F3/016 ,  H03C1/36

摘要： An amplitude modulator circuit includes a reference oscillator and an envelope modulator coupled to the reference oscillator for receiving a reference signal. A microcontroller is coupled to the envelope modulator for providing an envelope signal to the envelope modulator and a low pass filter is coupled to the envelope modulator for receiving a modulated command from the envelope modulator. An inverter is coupled to the low pass filter for receiving a low passed envelope modulated signal from the low pass filter and a transducer or amplifier is coupled to the inverter and the low pass filter for receiving an inverted low passed signal and the low passed envelope modulated signal.

摘要翻译： 振幅调制器电路包括参考振荡器和耦合到基准振荡器的包络调制器，用于接收参考信号。 微控制器耦合到包络调制器，以向包络调制器提供包络信号，并且低通滤波器耦合到包络调制器，用于从包络调制器接收调制的指令。 反相器耦合到低通滤波器，用于从低通滤波器接收低通过的包络调制信号，并且换能器或放大器耦合到反相器和低通滤波器，用于接收反向低通信号，低通量包络调制 信号。

公开(公告)号：US20110255578A1

公开(公告)日：2011-10-20

申请号：US13093887

申请日：2011-04-26

申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, JR.

发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, JR.

IPC分类号： H04B1/38

CPC分类号： H03C1/36 ,  H03C3/38 ,  H03D7/00 ,  H03D7/125 ,  H04B2001/0491

摘要： A method and system is described wherein a signal with a lower frequency is up-converted to a higher frequency. In one embodiment, the higher frequency signal is used as a stable frequency and phase reference. In another embodiment, the invention is used as a transmitter. The up-conversion is accomplished by controlling a switch with an oscillating signal, the frequency of the oscillating signal being selected as a sub-harmonic of the desired output frequency. When the invention is being used as a frequency or phase reference, the oscillating signal is not modulated, and controls a switch that is connected to a bias signal. When the invention is being used in the frequency modulation (FM) or phase modulation (PM) implementations, the oscillating signal is modulated by an information signal before it causes the switch to gate the bias signal. In the amplitude modulation implementation (AM), the oscillating signal is not modulated, but rather causes the switch to gate a reference signal that is substantially equal to or proportional to the information signal. In the FM and PM implementations, the signal that is output from the switch is modulated substantially the same as the modulated oscillating signal. In the AM implementation, the signal that is output from the switch has an amplitude that is a function of the information signal. In both embodiments, the output of the switch is filtered, and the desired harmonic is output.

摘要翻译： 描述了一种方法和系统，其中具有较低频率的信号被上变频到更高的频率。 在一个实施例中，较高频率信号用作稳定的频率和相位参考。 在另一个实施例中，本发明用作发射机。 通过用振荡信号控制开关来实现上变换，振荡信号的频率被选择为所需输出频率的次谐波。 当本发明用作频率或相位参考时，振荡信号不被调制，并且控制连接到偏置信号的开关。 当本发明用于频率调制（FM）或相位调制（PM）实施方案中时，振荡信号在信号信号被调制之前，使开关门偏置偏置信号。 在幅度调制实现（AM）中，振荡信号不被调制，而是使开关栅极基本上等于或者与信息信号成比例的参考信号。 在FM和PM实现中，从开关输出的信号被调制为基本上与调制振荡信号相同。 在AM实现中，从开关输出的信号具有作为信息信号的函数的幅度。 在两个实施例中，开关的输出被滤波，并且输出所需的谐波。

公开(公告)号：US20110121911A1

公开(公告)日：2011-05-26

申请号：US12948225

申请日：2010-11-17

申请人： Koichiro KAMATA

发明人： Koichiro KAMATA

IPC分类号： H03C1/00

CPC分类号： H01L29/7869 ,  G06K19/07775 ,  H01L23/66 ,  H01L27/0629 ,  H01L28/20 ,  H01L28/40 ,  H01L29/78693 ,  H01L29/78696 ,  H01L2223/6677 ,  H03C1/36 ,  H04M2201/04 ,  H04M2201/06

摘要： A modulation circuit includes a load and a transistor serving as a switch. The transistor has an oxide semiconductor layer in which hydrogen concentration is 5×1019/cm3 or less. The off-state current of the transistor is 1×10−13 A or less. A modulation circuit includes a load, a transistor serving as a switch, and a diode. The load, the transistor, and the diode are connected in series between the terminals of an antenna. The transistor has an oxide semiconductor layer in which hydrogen concentration is 5×1019/cm3 or less. An off-state current of the transistor is 1×10−13 A or less. On/off of the transistor is controlled in accordance with a signal inputted to a gate of the transistor. The load is a resistor, a capacitor, or a combination of a resistor and a capacitor.

摘要翻译： 调制电路包括负载和用作开关的晶体管。 该晶体管具有氢浓度为5×1019 / cm3以下的氧化物半导体层。 晶体管的截止电流为1×10-13A或更小。 调制电路包括负载，用作开关的晶体管和二极管。 负载，晶体管和二极管串联连接在天线的端子之间。 该晶体管具有氢浓度为5×1019 / cm3以下的氧化物半导体层。 晶体管的截止电流为1×10-13A或更小。 根据输入到晶体管的栅极的信号来控制晶体管的导通/截止。 负载是电阻器，电容器或电阻器和电容器的组合。

公开(公告)号：US07898354B2

公开(公告)日：2011-03-01

申请号：US12305546

申请日：2007-06-20

申请人： Shigeru Kobayashi ,  Michiaki Matsuo ,  Suguru Fujita

发明人： Shigeru Kobayashi ,  Michiaki Matsuo ,  Suguru Fujita

IPC分类号： H03K7/02

CPC分类号： H03C1/36 ,  H03K7/08

摘要： It is an object of the invention to provide a pulse generation circuit and a modulator for realizing a high On/Off ratio in a small circuit scale and with lower power consumption. A short pulse generation circuit according to the invention includes an oscillator 101, a control signal generation circuit 102, an intermittent frequency multiplier 103, a filter 104, and an output terminal 105. The oscillator 101 and the intermittent frequency multiplier 103 are active circuits implemented as active elements. A continuous signal is output from the oscillator 101 and is input to the intermittent frequency multiplier 103 and the intermittent frequency multiplier 103 intermittently operates according to a control signal output from the control signal generation circuit 102, thereby generating a short pulse signal, and a spurious component is removed through the filter.

摘要翻译： 本发明的目的是提供一种用于在小电路规模和低功耗下实现高开/关比的脉冲发生电路和调制器。 根据本发明的短脉冲发生电路包括振荡器101，控制信号产生电路102，间歇倍频器103，滤波器104和输出端子105.振荡器101和间歇倍频器103是实现的有源电路 作为活动元素。 从振荡器101输出连续信号，并输入到间歇倍频器103，并且间歇频率乘法器103根据从控制信号发生电路102输出的控制信号间歇地工作，从而产生短脉冲信号和假 组件通过过滤器被去除。

公开(公告)号：US20090174495A1

公开(公告)日：2009-07-09

申请号：US12372448

申请日：2009-02-17

申请人： Shigeru Arisawa

发明人： Shigeru Arisawa

IPC分类号： H03K7/00 ,  H03F3/72 ,  H03K7/02 ,  G06K19/07

CPC分类号： G06K7/0008 ,  G06K19/0723 ,  H03C1/08 ,  H03C1/14 ,  H03C1/36 ,  H03F3/72 ,  H03F2200/327 ,  H03F2203/7215 ,  H03K7/02 ,  H04L27/04 ,  H04L27/06

摘要： In a contactless IC card system, a modulating circuit manufactured in an IC form is operable at a high power efficiency. The demodulating apparatus is configured to include: first signal output means for outputting a first output signal having a predetermined phase with respect to that of an input signal, a second signal output means for outputting a second output signal having a predetermined phase with respect to that of the input signal, gate means for gating at least the second output signal, calculation means for adding, or subtracting the first output signal and the second output signal; and control means for controlling the operation of the gate means in response to a logic level of input data.

摘要翻译： 在非接触IC卡系统中，以IC形式制造的调制电路以高功率效率工作。 解调装置被配置为包括：第一信号输出装置，用于输出相对于输入信号具有预定相位的第一输出信号;第二信号输出装置，用于输出具有预定相位的第二输出信号，该第二输出信号具有相对于 至少选择第二输出信号的门装置，用于相加或减去第一输出信号和第二输出信号的计算装置; 以及用于响应于输入数据的逻辑电平来控制门装置的操作的控制装置。

公开(公告)号：US07546096B2

公开(公告)日：2009-06-09

申请号：US11802389

申请日：2007-05-22

申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr.

IPC分类号： H04B1/00

CPC分类号： H03C1/36 ,  H03C3/38 ,  H03D7/00 ,  H03D7/125 ,  H04B2001/0491

摘要： A method and system is described wherein a signal with a lower frequency is up-converted to a higher frequency. In one embodiment, the higher frequency signal is used as a stable frequency and phase reference. In another embodiment, the invention is used as a transmitter. The up-conversion is accomplished by controlling a switch with an oscillating signal, the frequency of the oscillating signal being selected as a sub-harmonic of the desired output frequency. When the invention is being used as a frequency or phase reference, the oscillating signal is not modulated, and controls a switch that is connected to a bias signal. When the invention is being used in the frequency modulation (FM) or phase modulation (PM) implementations, the oscillating signal is modulated by an information signal before it causes the switch to gate the bias signal. In the amplitude modulation implementation (AM), the oscillating signal is not modulated, but rather causes the switch to gate a reference signal that is substantially equal to or proportional to the information signal. In the FM and PM implementations, the signal that is output from the switch is modulated substantially the same as the modulated oscillating signal. In the AM implementation, the signal that is output from the switch has an amplitude that is a function of the information signal. In both embodiments, the output of the switch is filtered, and the desired harmonic is output.

摘要翻译： 描述了一种方法和系统，其中具有较低频率的信号被上变频到更高的频率。 在一个实施例中，较高频率信号用作稳定的频率和相位参考。 在另一个实施例中，本发明用作发射机。 通过用振荡信号控制开关来实现上变换，振荡信号的频率被选择为所需输出频率的次谐波。 当本发明用作频率或相位参考时，振荡信号不被调制，并且控制连接到偏置信号的开关。 当本发明用于频率调制（FM）或相位调制（PM）实施方案中时，振荡信号在信号信号被调制之前，使开关门偏置偏置信号。 在幅度调制实现（AM）中，振荡信号不被调制，而是使开关栅极基本上等于或者与信息信号成比例的参考信号。 在FM和PM实现中，从开关输出的信号被调制为基本上与调制振荡信号相同。 在AM实现中，从开关输出的信号具有作为信息信号的函数的幅度。 在两个实施例中，开关的输出被滤波，并且输出所需的谐波。

公开(公告)号：US07395038B2

公开(公告)日：2008-07-01

申请号：US11317228

申请日：2005-12-22

申请人： Earl W. McCune

发明人： Earl W. McCune

IPC分类号： H01Q11/12 ,  H04B1/04

CPC分类号： H03C1/36 ,  H01Q1/243 ,  H03F1/02 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/0227 ,  H03F1/0244 ,  H03F1/0277 ,  H03F1/32 ,  H03F3/2178 ,  H03F3/24 ,  H03F2200/504 ,  H03G3/004 ,  H03G3/3047 ,  H04B2001/0408 ,  H04B2001/045

摘要： The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., hard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired modulation. In one embodiment, the spread between a maximum frequency of the desired modulation and the operating frequency of a switch-mode DC-DC converter is reduced by following the switch-mode converter with an active linear regulator. The linear regulator is designed so as to control the operating voltage of the power amplifier with sufficient bandwidth to faithfully reproduce the desired amplitude modulation wave-form. The linear regulator is further designed to reject variations on its input voltage even while the output voltage is changed in response to an applied control signal. This rejection will occur even though the variations on the input voltage are of commensurate or even lower frequency than that of the controlled output variation. Amplitude modulation may be achieved by directly or effectively varying the operating voltage on the power amplifier while simultaneously achieving high efficiency in the conversion of primary DC power to the amplitude modulated output signal. High efficiency is enhanced by allowing the switch-mode DC-to-DC converter to also vary its output voltage such that the voltage drop across the linear regulator is kept at a low and relatively constant level. Time-division multiple access (TDMA) bursting capability may be combined with efficient amplitude modulation, with control of these functions being combined. In addition, the variation of average output power level in accordance with commands from a communications system may also be combined within the same structure.

摘要翻译： 本发明一般地提供了高效率（例如，硬限制或开关模式）功率放大器的功率控制，以实现期望的调制。 在一个实施例中，通过使用有源线性调节器跟随开关模式转换器来减小所需调制的最大频率与开关模式DC-DC转换器的工作频率之间的扩展。 线性调节器被设计成以足够的带宽来控制功率放大器的工作电压，以忠实地再现所需的幅度调制波形。 线性稳压器进一步被设计为即使当输出电压响应于所施加的控制信号而改变时也可以抑制其输入电压的变化。 即使输入电压的变化与受控输出变化的变化相当甚至更低的频率，也将发生该抑制。 幅度调制可以通过直接或有效地改变功率放大器上的工作电压来实现，同时实现初级DC功率到幅度调制输出信号的转换的高效率。 通过允许开关模式DC-DC转换器也改变其输出电压，使得线性稳压器两端的电压降保持在较低且相对恒定的水平，从而提高了高效率。 时分多址（TDMA）突发能力可以与有效的幅度调制组合，并且这些功能的控制被组合。 此外，根据来自通信系统的命令的平均输出功率电平的变化也可以在相同的结构内组合。

公开(公告)号：US07349679B1

公开(公告)日：2008-03-25

申请号：US10881428

申请日：2004-06-30

申请人： Jacques Rudell ,  Beomsup Kim

发明人： Jacques Rudell ,  Beomsup Kim

IPC分类号： H04B1/16

CPC分类号： H04B1/0483 ,  H03B28/00 ,  H03C1/36 ,  H03F1/0205 ,  H03F1/0294 ,  H03F3/211 ,  H03F3/24 ,  H03F3/66 ,  H03F2200/324 ,  H03F2200/451 ,  H03F2203/21142 ,  H04L27/368

摘要： A power amplifier develops a modulated high power signal by summing the outputs of multiple voltage controlled oscillators. A phase control circuit synchronizes the phase relationship of multiple voltage controlled oscillators. The voltage control oscillators provide amplitude modulation of an output signal of the voltage controlled oscillator by adjusting transconductance of amplification devices of the voltage controlled oscillator. Another embodiment of the power amplifier provides buffer circuits at the outputs of the voltage controlled oscillators. The gain or delay of the buffer circuits is varied to provide amplitude modulation of the power amplifier.

摘要翻译： 功率放大器通过对多个压控振荡器的输出相加来产生调制的高功率信号。 相位控制电路同步多个压控振荡器的相位关系。 电压控制振荡器通过调节压控振荡器的放大装置的跨导来提供压控振荡器的输出信号的幅度调制。 功率放大器的另一实施例在压控振荡器的输出处提供缓冲电路。 改变缓冲电路的增益或延迟以提供功率放大器的幅度调制。

公开(公告)号：US07174140B2

公开(公告)日：2007-02-06

申请号：US10835192

申请日：2004-04-30

申请人： Duck Su Oh ,  Yong Kyu Kim

发明人： Duck Su Oh ,  Yong Kyu Kim

IPC分类号： H04B1/18

CPC分类号： H03C1/36

摘要： An RF system integrated with an RF switching unit and an RF modulator unit. In accordance with the present invention, it is provided the RF system including a plurality of antenna, an RF unit and a digital tuner and demodulator unit, includes a plurality of RF input terminals connected with the respective antenna; an RF relay for selectively outputting RF signal inputted to the plurality of RF input terminals on the basis of control signal; an RF amplifier for amplifying RF signal outputted from the RF relay; an RF signal distributor for distributing RF signal amplified and outputted from the RF amplifier; an RF modulator for receiving and modulating signal outputted from the digital tuner and demodulator unit connected with the RF signal distributor to output RF signal; an RF selection switch for selectively outputting at least one of RF signal outputted from the RF signal distributor and RF signal outputted from the RF modulator on the basis of control signal; and an RF output terminal for outputting signal from the RF selection switch.

摘要翻译： 与RF开关单元和RF调制器单元集成的RF系统。 根据本发明，提供了包括多个天线，RF单元和数字调谐器和解调器单元的RF系统，包括与相应天线连接的多个RF输入端子; RF继电器，用于基于控制信号选择性地输出输入到所述多个RF输入端子的RF信号; 用于放大从RF继电器输出的RF信号的RF放大器; RF信号分配器，用于分配从RF放大器放大和输出的RF信号; RF调制器，用于接收和调制从RF信号分配器连接的数字调谐器和解调器单元输出的信号，以输出RF信号; RF选择开关，用于根据控制信号有选择地输出从RF信号分配器输出的RF信号和从RF调制器输出的RF信号中的至少一个; 以及用于从RF选择开关输出信号的RF输出端子。

公开(公告)号：US07164328B2

公开(公告)日：2007-01-16

申请号：US10426557

申请日：2003-04-30

申请人： Jiren Yuan ,  Yijun Zhou

发明人： Jiren Yuan ,  Yijun Zhou

IPC分类号： H03C1/00 ,  H03C3/00 ,  H04L27/36

CPC分类号： H03C1/547 ,  H03C1/36 ,  H04L27/36

摘要： Various embodiments of a direct digital amplitude modulator (DDAM) for modulating radio frequency (RF) or intermediate frequency (IF) or baseband signal with the invented interpolation technique are disclosed. The interpolation technique greatly reduces the amplitudes of alias signals without using an analog filter. The embodiments therefore are significant for various communication transmitters to achieve simple structure, good linearity and high power efficiency.

摘要翻译： 本发明公开了用于调制射频（RF）或中频（IF）或基带信号的直接数字幅度调制器（DDAM）的各种实施例。 内插技术大大降低了别名信号的幅度，而不使用模拟滤波器。 因此，这些实施例对于各种通信发射机是重要的，以实现简单的结构，良好的线性度和高功率效率。