| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Balanced modulator | JP8666679 | 1979-07-09 | JPS5610713A | 1981-02-03 | YAMAMOTO HEIICHI; OKAMOTO SHIGEHARU; KURITA OSAMU; KOMAKI SHIYOUZOU; ICHIKAWA TAKAAKI |
| PURPOSE:To obtain a high-performance balanced modulator, by dividing the carrier signal into two parts and then giving the amplitude modulation to the modulated wave signal of one part to be then compounded with the signal of the other part in the reverse phase. CONSTITUTION:The carrier signal sent from terminal 1 is divided into two parts through branching circuit 4. One part of the divided signal is supplied to compounding unit 7 via delay circuit 5 and level adjuster 6; and the other part is supplied to dual gate FET8 and then supplied to unit 7 after receiving the modulation of amplitude by the modulated signal sent from terminal 3. The signals of these two series are compounded at unit 7 and in the reverse phase to each other. Thus such unit as the FET amplitude modulator having the gain is used for the amplitude modulator in order to obtain a balanced modulator of a small size and having the gain. Also both the modulating characteristics of good linearity and the excellent balancing property can be obtained. As a result, a high-performance balanced modulator can be realized. | ||||||
| 122 | JPS5537121B2 - | JP6118174 | 1974-05-30 | JPS5537121B2 | 1980-09-26 | |
| 123 | Frequency stabilizer | JP11054479 | 1979-08-31 | JPS5535597A | 1980-03-12 | POORU RUZARUTORU |
| 124 | Amplitude modulating circuit | JP11701776 | 1976-09-29 | JPS5342542A | 1978-04-18 | KURODA MASAHIRO; YOSHIMURA HIROMITSU |
| 125 | MODULATION CIRCUIT | PCT/DE0100532 | 2001-02-12 | WO0163743A3 | 2002-11-21 | KARGL WALTER; MELCHER GEBHARD |
| The invention relates to a modulation circuit for a transponder. Said modulation circuit has non-linear components which are located between a switching transistor (M5) and coil terminals (LA, LB). Consequently, the resulting non-linear modulation curve has a greater range. In order to save chip space, the diodes (M4, M3) of a parallel voltage regulator that are connected to the coil (L) can be used as the non-linear components. The voltage regulator and the modulation circuit can be mutually locked in order to prevent unwanted mutual influences between them. | ||||||
| 126 | HIGH-EFFICIENCY MODULATING RF AMPLIFIER | PCT/US0003350 | 2000-02-09 | WO0048307A8 | 2001-04-12 | MCCUNE EARL W |
| The present invention 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 waveform. 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. | ||||||
| 127 | IQ transmitter | EP09154426.2 | 2009-03-05 | EP2101407B1 | 2018-04-25 | Van Waasen, Stefan |
| Circuitry (314, 316, 318, 320) separates a modulation signal into digital sign (S4, S7) and magnitude (S5, S6) signal components. The digital magnitude signal is converted to an analog magnitude signal. The analog magnitude signal is then mixed with an in-phase (IC) or quadrature (QC) carrier signal under the influence of the digital sign signal (S4, S7) and routed to a driver output stage (332). | ||||||
| 128 | PROCEDE ET DISPOSITIF DE CONTROLE DE PUISSANCE CRETE ET DE LARGEUR D'IMPULSION D'UN EMETTEUR DE FORTE PUISSANCE RF IMPULSIONNEL GAUSSIEN LARGE BANDE | EP06793079.2 | 2006-08-30 | EP1929625B1 | 2015-01-07 | LETEMPLIER, Alain |
| 129 | Verfahren und Vorrichtung zum Erzeugen und diskontinuierlichen Senden einer Grundschwingung in einer vorbestimmten Trägerfrequenz | EP03400023.2 | 2003-05-16 | EP1394931B1 | 2014-12-31 | Künzler, Frank |
| 130 | Amplitudenmodulator | EP05003011.3 | 2005-02-12 | EP1691481B1 | 2014-04-02 | Kirchmeier, Thomas |
| 131 | IQ transmitter | EP09154426.2 | 2009-03-05 | EP2101407A3 | 2013-10-23 | Van Waasen, Stefan |
Circuitry (314, 316, 318, 320) separates a modulation signal into digital sign (S4, S7) and magnitude (S5, S6) signal components. The digital magnitude signal is converted to an analog magnitude signal. The analog magnitude signal is then mixed with an in-phase (IC) or quadrature (QC) carrier signal under the influence of the digital sign signal (S4, S7) and routed to a driver output stage (332).
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| 132 | RADIO FREQUENCY MODULATOR | EP09752605.7 | 2009-11-05 | EP2351207B1 | 2012-10-03 | RODRIGUEZ, Istvan; LINDQUIST, JR., Robert, A. |
| 133 | A DIGITAL AMPLITUDE MODULATION TRANSMITTER WITH PULSE WIDTH MODULATING RF DRIVE | EP06748514 | 2006-03-20 | EP1878121A4 | 2012-08-22 | LUU KY THOAI |
| 134 | Power-efficient spectrum shaping for a magnetic lnik | EP12150085.4 | 2012-01-03 | EP2472720A2 | 2012-07-04 | Phillips, Norbert; Thoen, Steven |
Various embodiments relate to a transmission circuit and related method of shaping the transmission spectrum of a carrier signal. The transmission circuit may comprise a plurality of switching amplifier stages that are controlled by a modulation sequence produced by a transmission (TX) modulator. The TX modulator may receive the transmission data as a sequence of bit groups and may produce a modulation sequence including a plurality of control bits that may drive each of the switching amplifier stages. In some embodiments, one or more pulse-shaping filters may modify in-phase (I) and quadrature (Q) phase components of the transmission data. The modified components may directly shape spectral content of the output signal produced by a transmission driving circuit. Higher quantities of amplifier stages included in the transmission driving circuit may add higher granularity to the shape of the spectrum of the output signal.
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| 135 | RADIO FREQUENCY MODULATOR | EP09752605.7 | 2009-11-05 | EP2351207A1 | 2011-08-03 | RODRIGUEZ, Istvan; LINDQUIST, JR., Robert, A. |
| A radio frequency modulator system having a radio frequency amplifier controlled by a pulse modulator. The pulse modulator includes: a first switching circuit response to an input pulse for coupling a dc voltage relative to a reference potential to the output electrode when the radio frequency signal is to be amplified by the radio frequency amplifier and for decoupling the dc voltage from the output electrode when the radio frequency signal is to be decoupled from the output electrode wherein charge is stored in the storage element when the dc voltage is coupled to the output electrode; and: a second switching circuit responsive to the input pulse for discharging the stored charge when the dc voltage is decoupled from the output electrode. | ||||||
| 136 | AM transmitter and modulation method using same | EP08011803.7 | 2008-06-30 | EP2056447A3 | 2009-12-23 | Matsuo, Shin-ichi; Iwata, Hirokazu; Kinugawa, Fuminori |
An AM (Amplitude-Modulated) transmitter (1) capable of improving modulation distortion is provided. An adder (20) adds a modulation signal to a pre-set power reference signal. An APC (Automatic Power Control) amplifier (21) compares a level of a detecting signal outputted by the LPF (Low Pass Filter) (14) with a level of an adder signal. The APC amplifier (21), based on the comparison result, generates a gain controlling signal that makes a difference between a level of the detecting signal and level of the signal approach zero and feeds the gain controlling signal to a power amplifier (13). The power amplifier (13) modulates the signal outputted from the amplifier by the gain controlling signal and power-amplifies the modulated signal according to a level of the gain controlling signal. Since the APC amplifier (21) feeds the gain controlling signal to the power amplifier (13), a modulation degree does not depend on a nonlinear distortion characteristic of the power amplifier.
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| 137 | METHOD AND SYSTEM FOR POWER LINE NULL DETECTION AND AUTOMATIC FREQUENCY AND GAIN CONTROL | EP01927149 | 2001-04-17 | EP1287620A4 | 2009-07-08 | BULLOCK SCOTT R; HOOBLER RYAN; BARTHOLOMEW DAVID |
| A system and method for detecting power line null frequencies and for adjusting the transmit frequency and transmit power to maximize the reliability and efficiency of the AC power line transmission link. The system includes a programmable logic device (102) in the transmitter, which receives information (101) and generatesa control signal (103) which controls the gain of amplifier (109) and provides a PPL control signal (104) for directing the Phase Locked Loop (105) in its selection of multiple frequencies for transmission to a receiver. A receiver detects and records the bit error rate and/or the received noise per frequency and communicates this information to the transmitter. When all desired frequencies have been transmitted and tested, the optimal frequency is identified or selected. Generally, the optimal frequency is the frequency requiring the lowest transmit power while maintaining an acceptable bit error rate or an acceptable noise level. | ||||||
| 138 | PROCEDE ET DISPOSITIF DE CONTROLE DE PUISSANCE CRETE ET DE LARGEUR D'IMPULSION D'UN EMETTEUR DE FORTE PUISSANCE RF IMPULSIONNEL GAUSSIEN LARGE BANDE | EP06793079.2 | 2006-08-30 | EP1929625A2 | 2008-06-11 | LETEMPLIER, Alain |
| The invention concerns a device for controlling parameters of a pulse of a high power RF pulse transmitter comprising at least one amplifier characterized in that it includes at least the following components: a transmitted pulse detector (4), a video amplifier (5), an analog processing device (6) adapted to supply data concerning the parameters of width and power of the transmitted pulse, a digital processing device (7) receiving the data concerning parameters of the transmitted pulse and adapted to generate the control signals to a device (8) adapted to generate a variable amplitude substantially Gaussian signal synchronized with the synchro transmission and to generate signals for controlling a device (9) adapted to generate a variable amplitude substantially square signal synchronized with the synchro transmission. | ||||||
| 139 | RESONANT POWER CONVERTER FOR RADIO FREQUENCY TRANSMISSION AND METHOD | EP03713861.7 | 2003-03-04 | EP1488587B1 | 2007-05-09 | NORSWORTHY, Steven, R.; NORSWORTHY, Ross, W. |
| A resonant power converter (220) for ultra-efficient radio frequency transmission and associated methods is disclosed. In one exemplary embodiment, the invention is digitally actuated and uses a combination of a noise-shaped encoder (222), a charging switch (224), and a high-Q resonator (204) coupled to an output load (206), typically an antenna or transmission line. Energy is built up in the electric and magnetic fields of the resonator, which, in turn, delivers power to the load (206) with very little wasted energy in the process. No active power amplifier is required. The apparatus (220) can be used in literally any RF signal application (wireless or otherwise), including for example cellular handsets, local- or wide-area network transmitters, or even radio base-stations. | ||||||
| 140 | AMPLITUDE MODULATOR | EP00949486.5 | 2000-08-14 | EP1125358B1 | 2007-04-11 | EIBEL, Thomas; ARNOLD, Siegfried; THÜRINGER, Peter |
| In a communication arrangement (1) provided for transmitting data (DA) to a transponder (2) which arrangement includes a data source (5) for delivering data (DA) and includes a carrier signal generator (6) for generating a carrier signal (CS) and includes modulation means (7) to which can be applied the data (DA) and the carrier signal (CS) and which modulation means are provided for modulating a carrier signal (CS) in accordance with the data (DA) and for delivering a modulated carrier signal (CSM) to transmitting means (8) having an input resistance (9), the modulation means (7) have a changeable output resistance (10) which forms a resistance network together with the input resistance (9) of the transmitting means (8), and resistance change means (25) for changing the output resistance (10) in accordance with the data (DA). | ||||||
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