| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | 数字射频发射器及方法 | CN03158076.9 | 2003-09-04 | CN1496012A | 2004-05-12 | 许伟展 |
| 本发明提供一种数字射频发射器，包括：一个调制器，接收具有一第一频率fs的一个N位的数字基带信号，并对该数字基带信号进行调制而得到具有M倍fs频率的一个1位的调制后基带信号；一个本机振荡器，产生一数字载频信号；一个数字混合器，接收该调制后基带信号及该数字载频信号，并进行该调制后基带信号及该数字载频信号的乘法运算后产生一个发射信号；以及一个切换式功率放大器，将该发射信号放大。 | ||||||
| 2 | 低噪声吉尔伯特乘法器小单元和正交调制器,及相关方法 | CN98808909.2 | 1998-09-03 | CN1113452C | 2003-07-02 | A·哈齐克里斯托斯 |
| 吉尔伯特(Gilbert)乘法器小单元包括发射极耦合晶体管和一对交叉耦合发射极耦合晶体管对。滤波器把发射极耦合晶体管对耦合到该对交叉耦合发射极耦合晶体管对。滤波器可包括一对电感或电阻，其各自的一个电感或电阻把发射极耦合晶体管对的各个晶体管串联耦合到该对交叉耦合发射极耦合晶体管对的各个晶体管，以及一个电容，被连接在该对电感或电阻之间。本地振荡器被耦合到该对交叉耦合发射极耦合晶体管对，以及数据输入被耦合到发射极耦合晶体管对。通过对于被加到该对交叉耦合发射极耦合晶体管对的发射极耦合晶体管对的输出进行低通滤波，可以提供低噪声基底吉尔伯特乘法器小单元和正交相位调制器。 | ||||||
| 3 | 一种基于门限判断的深度调幅电路及调幅方法 | CN201610723194.7 | 2016-08-17 | CN106341086A | 2017-01-18 | 卢凯; 刘盛; 周玉勇 |
| 本发明提出了一种基于门限判断的深度调幅电路，包括：功率参考、调幅信号、定向耦合器、检波器、对数放大器、积分单元、电压比较器、受控开关、线性调制器，调幅电路与ALC电路共同实现功率的稳定控制与幅度调制；电压比较器控制积分单元前端的受控开关，电压比较器的输入是调幅深度门限信号和前馈信号，当前馈信号大于等于调幅深度门限信号时，电压比较器控制开关导通，积分单元处于积分的状态；当前馈信号小于调幅深度门限信号时，电压比较器控制开关断开，积分单元处于保持的状态。由此，本发明可以实现深度调幅输出，提高射频微波信号源的性能指标。 | ||||||
| 4 | 低噪声吉尔伯特(GILBERT)乘法器小单元和正交调制器,及相关方法 | CN98808909.2 | 1998-09-03 | CN1269921A | 2000-10-11 | A·哈齐克里斯托斯 |
| 吉尔伯特(Gilbert)乘法器小单元包括发射极耦合晶体管和一对交叉耦合发射极耦合晶体管对。滤波器把发射极耦合晶体管对耦合到该对交叉耦合发射极耦合晶体管对。滤波器可包括一对电感或电阻,其各自的一个电感或电阻把发射极耦合晶体管对的各个晶体管串联耦合到该对交叉耦合发射极耦合晶体管对的各个晶体管,以及一个电容,被连接在该对电感或电阻之间。本地振荡器被耦合到该对交叉耦合发射极耦合晶体管对,以及数据输入被耦合到发射极耦合晶体管对。通过对于被加到该对交叉耦合发射极耦合晶体管对的发射极耦合晶体管对的输出进行低通滤波,可以提供低噪声基底吉尔伯特乘法器小单元和正交相位调制器。 | ||||||
| 5 | ENVELOPE MODULATOR FOR HAPTIC FEEDBACK DEVICES | EP02750399.4 | 2002-08-02 | EP1451648B1 | 2007-03-28 | TIERLING, Kollin, M. |
| An amplitude modulator circuit 10 includes a reference oscillator 11 and an envelope modulator 12 coupled to the reference oscillator for receiving a reference signal. A microcontroller 14 is coupled to the envelope modulator for providing an envelope signal 13 to the envelope modulator and a low pass filter 15 is coupled to the envelope modulator for receiving a modulated command 16 from the envelope modulator. An inverter 17 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 19 is coupled to the inverter and the low pass filter for receiving an inverted low passed signal and the low passed envelope modulated signal. | ||||||
| 6 | ENVELOPE MODULATOR FOR HAPTIC FEEDBACK DEVICES | EP02750399.4 | 2002-08-02 | EP1451648A2 | 2004-09-01 | TIERLING, Kollin, M. |
| An amplitude modulator circuit (10) includes a reference oscillator (11) and an envelope modulator (12) coupled to the reference oscillator for receiving a reference signal. A microcontroller (14) is coupled to the envelope modulator for providing an envelope signal (13) to the envelope modulator and a low pass filter (15) is coupled to the envelope modulator for receiving a modulated command (16) from the envelope modulator. An inverter (17) 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 (19) is coupled to the inverter and the low pass filter for receiving an inverted low passed signal and the low passed envelope modulated signal. | ||||||
| 7 | Harmonic distortion compensation circuit | EP93108795.1 | 1993-06-01 | EP0572974A1 | 1993-12-08 | Minami, Michitosi, c/o Japan Radio Co., Ltd.; Kojima, Yutaka, c/o Japan Radio Co., Ltd.; Hayeiwa, Kazuhisa c/o Nippon Hoso Kyokai; Naka, Hisashi, c/o Nippon Hoso Kyokai |
A digital signal is converted into an analog signal by each of a plurality of digital-to-analog converters (16, 17). One of signals output by the digital-to-analog converters (16, 17) is selected by a change-over switch (20) for feeding to a circuit at the following stage (4). A timing generator (18) generates timing pulses. An inverter (19) inverts the timing pulses. Latch circuits (14, 15) operate in opposite phases to each other. The timing pulses are used to control the change-over switch (20) for removing harmonic distortion caused by settling from the output signals of the digital-to-analog converters (16, 17). |
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| 8 | Amplitude modulation apparatus | EP88200506.9 | 1988-03-18 | EP0284152A3 | 1990-06-27 | Katsuhiro, Endo; Yasumichi, Imai |
An amplitude modulation apparatus characterized in that a high frequency modulation circuit (3) is provided at the down-stream side of an automatic output control circuit (2) which inputs a low frequency signal, the high frequency signal level of an output of said high frequency modulation circuit being detected to obtain a detection signal which activates said automatic output control circuit. |
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| 9 | Rc / cr broadband iq modulator with automatic quadrature network | JP20764894 | 1994-08-31 | JP3648272B2 | 2005-05-18 | アンドリュー・エム・ティーツェル; マーカス・ケイ・ダッシルヴァ |
| 10 | Amplitude modulating device | JP6369887 | 1987-03-20 | JPS63232506A | 1988-09-28 | ENDO KATSUHIRO; IMAI YASUMICHI |
| PURPOSE: To remove a strain caused by the delay of an auto level controller by modulating an output from a low frequency amplification circuit into a high frequency and controlling the gain of the low frequency amplification circuit with a detection signal in the high frequency level. CONSTITUTION: As for a voice low frequency, the dynamic range of the low frequency is compressed into half in a compressor type amplifier 1 and the average voltage of a low frequency signal is raised by enlarging a small amplitude, moreover it passes through an automatic output control circuit 2 and is mixed with the output from a carrier oscillator 4 by a balanced modulation circuit 3 so as to be converted into a high frequency signal. A part of the output is amplified by a high frequency amplifier 5 and detected by a detector 6, so that a DC voltage corresponding to an input signal is fetched and the gain is controlled by negatively feeding back the detected voltage to the automatic output control circuit 2. Thus, it is not only needless to automatically control the gain on a high frequency amplification side, but also possible to attain the strain under conditions that it does not exceed a specified output power at all. COPYRIGHT: (C)1988,JPO&Japio | ||||||
| 11 | Reducing method for hum noise of modulator | JP5763180 | 1980-04-30 | JPS56154807A | 1981-11-30 | YOKOE TOSHINORI |
| PURPOSE:To eliminate hum noise included in a DC power source by a simple circuit by canceling the hum noise by using a phase inverting amplifier. CONSTITUTION:Direct-current DC power source 1 including hum noise is supplied to modulator 6 and base band amplifier 7 and a base band signal from terminal 8 is supplied to modulator 6 via amplifier 7. The hum noise included in power source 1, on the other hand, is extracted through LPF10 and then inverted in phase by phase inverting amplifier 11. This output and the output of amplifier 7 are then supplied to modulator 6 via mixing circuit 12. Therefore, the hum noise is canceled and removed and only the signal having no noise is outputted from modulator 6. Thus, even the simple circuit is capable of eliminating the hum noise included in the DC power source. | ||||||
| 12 | Automatic modulation factor control circuit of transmitter | JP15781077 | 1977-12-29 | JPS5492005A | 1979-07-20 | OKADA HISAO; KAWAMOTO YUKIHIRO |
| PURPOSE: To control with simple circuit and adjust easily by responding to the output of detection circuit 17 by a modulation input voltage control circuit and modulating the modulation output voltage within the specified level, thus controlling the modulation factor. CONSTITUTION: The signal applied to microphone 1 by automatic modulation control AMC circuit 16 is controlled, that is, feedback circuit 13 is installed from the output side to the input side of modulation signal amplifier circuit 5, the peak value of modulation output voltage is detected 17, modulation input voltage control circuit 18 is used for responding to the output of circuit 17 and modulation is made so that the peak value of modulation output voltage is kept lower than the specified level, thus controlling the modulation factor. With this invention, the automatic modulation factor control circuit of transmitter that meets all requirements can be made with a simple and readily adjustable circuit. COPYRIGHT: (C)1979,JPO&Japio | ||||||
| 13 | Automatic modulation degree control circuit for transmitter | JP11133577 | 1977-09-13 | JPS5443602A | 1979-04-06 | MATSUSHITA KOUICHI |
| PURPOSE:To improve the rise property of the modulation degree by controlling the modulation degree via the voltage comparator for the transceiver, and thus to increase the dynamic range. CONSTITUTION:Voltage comprator 10, which compares the modulation output voltage with the reference voltage and then generates the control signal according the level relationship between the both volage, is provided to feedback circuit 8 passing from the output side to the input side in modulation signal amplifier circuit 5, along with transistor Tr which is controlled by the control signal and supresses the modulation input voltage. Then the output voltage of mike 1 is controlled in accordance with the output of Tr. | ||||||
| 14 | 저 잡음 길버트 승산기 셀 및 직각 위상 변조기와 그의 방법 | KR1020007002410 | 1998-09-03 | KR1020010023755A | 2001-03-26 | 해지크리스토스아리스토틀 |
| 길버트승산기셀은에미터결합트랜지스터쌍 및한쌍의교차결합된에미터결합트랜지스터쌍을포함한다. 필터는에미터결합트랜지스터쌍을한쌍의교차결합된에미터결합트랜지스터쌍에결합한다. 필터는각 에미터결합트랜지스터쌍을각 쌍의교차결합된에미터결합트랜지스터쌍에직렬로제각기결합하는한쌍의인덕터또는저항기와, 인덕터또는저항기쌍 사이에접속된캐패시터를포함한다. 국부발진기는한쌍의교차결합된에미터결합트랜지스터쌍에결합되고, 데이터입력은에미터결합트랜지스터쌍에결합된다. 한쌍의교차결합된에미터결합트랜지스터쌍에인가되는에미터결합트랜지스터쌍의출력을저역통과필터링함으로써, 저잡음플로어의길버트승산기셀 및직각위상변조기가제공될수 있다. | ||||||
| 15 | SYNTHESIZER FOR TRANSMITTER AND DIGITAL AMPLITUDE MODULATOR | US14196652 | 2014-03-04 | US20140320226A1 | 2014-10-30 | Yoshihiko TAKAHASHI; Yuuki FUNAHASHI |
| According to one embodiment, a synthesizer for a transmitter includes a transformer, a plurality of core support units and a fixing member. The plurality of core support units includes a support plate, fixing unit and an insertion. The support plate supports a toroidal core around which the primary winding is wound. The fixing unit fixes the toroidal core to the support plate. The insertion portion is formed inside or around the toroidal core and into which the secondary winding is inserted. The fixing member includes a plurality of receiving portions to and from which the plurality of core support units are attached and detached. The plurality of receiving portions are formed along a direction in which the plurality of core support units are stacked. | ||||||
| 16 | Methods and apparatus for terahertz wave amplitude modulation | US13529934 | 2012-06-21 | US08836446B2 | 2014-09-16 | Berardi Sensale-Rodriguez; Huili (Grace) Xing; Rusen Yan; Michelle M. Kelly; Tian Fang; Debdeep Jena; Lei Liu |
| 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. | ||||||
| 17 | AMPLITUDE MODULATOR | US13380687 | 2010-04-08 | US20120094712A1 | 2012-04-19 | Masakatsu Maeda; Taichi Ikedo |
| 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. | ||||||
| 18 | Method and apparatus for generating RF waveforms having aggregate energy with desired spectral characteristics | US10686814 | 2003-10-17 | US07428258B2 | 2008-09-23 | Larry W. Fullerton; Arthur T. Bradley; Mark D. Roberts |
| 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. | ||||||
| 19 | RF digital transmitter | US10235943 | 2002-09-06 | US20040047429A1 | 2004-03-11 | Weichan Hsu |
| An RF digital transmitter. The transmitter comprises a modulator receiving and modulating a digital base-band signal, a local oscillator generating a digital carrier signal, a mixer receiving the digital base-band and carrier signal, and implementing multiplication of the digital base-band and carrier signal to generate a transmission signal, and a switching power amplifier amplifying the transmission signal. | ||||||
| 20 | Frequency doubling of a quadrature-amplitude modulated signal using a frequency multiplier | US835284 | 1997-04-09 | US5914620A | 1999-06-22 | Brent S. Simons; G. William Stockton |
| A method and system of frequency multiplying a signal having amplitude modulation using a frequency multiplier operated at a bias voltage that is less than its saturation mode voltage is described. Prior to amplification, the amplitude modulated signal is pre-distorted to compensate for distortion caused by the frequency multiplier. A first pre-distortion phase converts the amplitude modulated signal into a corresponding square root signal to compensate for a first distortion type. A second pre-distortion phase pre-distorts the square root signal to compensate for the distortion caused by biasing the frequency multiplier at a voltage less than the saturation voltage of the multiplier. As a result, a signal that is amplitude modulated can be multiplied by a frequency multiplier. | ||||||
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