| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | AM transmitter and modulation method using same | EP08011803.7 | 2008-06-30 | EP2056447B1 | 2014-11-19 | Matsuo, Shin-ichi; Iwata, Hirokazu; Kinugawa, Fuminori |
| 82 | TRANSMITTER | EP12793290 | 2012-05-23 | EP2571175A4 | 2014-02-19 | FUKUDA SHUICHI |
| There is provided a transmitter with a small area and low noise. A direct RF modulation transmitter is constituted by an N-number of input signal delay-attached direct RF converters to which an I digital baseband signal is input, an M-number of input signal delay circuit-attached direct RF converters (DDRCs) to which a Q digital baseband signal is input, a Divide-by-2 divider for generating a differential local signal differing in phase by 90 degrees, an output matching circuit, and a delay control circuit for controlling an input data delay amount for the DDRCs. This transmitter sets delay amounts for the DDRCs using the delay control circuit independently. Particularly when N is set to equal M and the same amount of delay is set for N-number of converters corresponding to the I digital baseband signal and the Q digital baseband signal, noise reduction effect in a predetermined frequency band is heightened. | ||||||
| 83 | A DIGITAL AMPLITUDE MODULATION TRANSMITTER WITH PULSE WIDTH MODULATING RF DRIVE | EP06748514.4 | 2006-03-20 | EP1878121B1 | 2013-09-25 | LUU, Ky Thoai |
| 84 | Mikrowellen-Pulsgenerator | EP03016123.6 | 2003-07-16 | EP1385266B1 | 2010-07-14 | Schultheiss, Daniel; Rauer, Winfried |
| 85 | VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN VON MIT AMPLITUDENUMTASTUNG CODIERTEN SIGNALEN | EP08736551.6 | 2008-04-24 | EP2151045A1 | 2010-02-10 | SCHEIBE, Sven-Matthias |
| Disclosed is an apparatus for encoding a signal by means of amplitude shift keying. Said apparatus comprises a class E amplifier with a switching transistor, to the gate of which a voltage having a triggering frequency is applied to trigger the class E amplifier. In order to achieve amplitude shift keying in the output signal of the class E amplifier, a circuit for switching the triggering frequency of the voltage (FT) that is applied to the gate of the switching transistor or the resonant frequency (FR) of the class E amplifier between a first value and a second value is provided so as to switch a degree of variation between the triggering frequency and the resonant frequency between a first value and a second value. | ||||||
| 86 | AM transmitter and modulation method using same | EP08011803.7 | 2008-06-30 | EP2056447A2 | 2009-05-06 | 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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| 87 | Amplitude modulation with wave shaping | EP03256472.6 | 2003-10-14 | EP1411694B1 | 2009-02-11 | Maeda, Tatsuo, c/o Sony Corporation; Yamagata, Akihiko, c/o Sony Corporation |
| 88 | Switching modulator | EP03077310.5 | 2003-07-22 | EP1388932B1 | 2008-08-06 | Fockens, Tallienco Wieand Harm |
| 89 | Verfahren und Vorrichtung zum Erzeugen und diskontinuierlichen Senden einer Grundschwingung in einer vorbestimmten Trägerfrequenz | EP03400023.2 | 2003-05-16 | EP1394931A3 | 2007-03-07 | Künzler, Frank |
Die vorliegende Erfindung betrifft ein Verfahren zum Erzeugen und diskontinuierlichen Senden einer Grundschwingung in einer vorbestimmten Trägerfrequenz sowie eine Vorrichtung zur Durchführung dieses Verfahrens. Das Verfahren und die Vorrichtung gemäß der Erfindung zeichnen sich dadurch aus, dass ein Takten erfolgt, so dass das Erzeugen einer Grundschwingung nur während festgelegter Sendepausen durchgeführt wird.
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| 90 | Amplitude modulation with wave shaping | EP03256472.6 | 2003-10-14 | EP1411694A3 | 2007-01-17 | Maeda, Tatsuo, c/o Sony Corporation; Yamagata, Akihiko, c/o Sony Corporation |
An amplitude modulator is modified by the inclusion of a wave-shaping network in the emitter circuit of the modulator. |
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| 91 | APPARATUS FOR DETECTING THE ENVELOPE OF RF POWER SIGNALS | EP03723009.1 | 2003-05-08 | EP1509998B1 | 2006-09-13 | BAR-DAVID, Israel; VEINBLAT, Alexander |
| Apparatus for detecting the envelope of an RF signal that comprises an RF transistor operating essentially at a non-linear operating point at the RF frequency range; a DC power supply for feeding the RF transistor; a dummy load for terminating the output of the RF transistor; and at lease one impedance, through which the DC power supply feeds the RF transistor, for obtaining an indication signal developed across the impedance. The indication signal represents the envelope, from the fluctuating current drawn by the RF transistor from the DC power supply during the time period when the RF signal is applied to the feeding input. | ||||||
| 92 | RESONANT POWER CONVERTER FOR RADIO FREQUENCY TRANSMISSION AND METHOD | EP03713861 | 2003-03-04 | EP1488587A4 | 2005-05-18 | 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. | ||||||
| 93 | APPARATUS FOR DETECTING THE ENVELOPE OF RF POWER SIGNALS | EP03723009.1 | 2003-05-08 | EP1509998A2 | 2005-03-02 | BAR-DAVID, Israel; VEINBLAT, Alexander |
| Apparatus for detecting the envelope of an RF signal that comprises an RF transistor operating essentially at a non-linear operating point at the RF frequency range; a DC power supply for feeding the RF transistor; a dummy load for terminating the output of the RF transistor; and at lease one impedance, through which the DC power supply feeds the RF transistor, for obtaining an indication signal developed across the impedance. The indication signal represents the envelope, from the fluctuating current drawn by the RF transistor from the DC power supply during the time period when the RF signal is applied to the feeding input. | ||||||
| 94 | A DIRECT DIGITAL AMPLITUDE MODULATOR | EP01981251.0 | 2001-11-01 | EP1338085A1 | 2003-08-27 | YUAN, Jiren; ZHOU, Yijun |
| This invention provides 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. The interpolation technique greatly reduces the amplitudes of alias signals without using an analog filter. The invention therefore is significant for various communication transmitters to achieve simple structure, good linearity and high power efficiency. | ||||||
| 95 | METHOD AND SYSTEM FOR POWER LINE NULL DETECTION AND AUTOMATIC FREQUENCY AND GAIN CONTROL | EP01927149.3 | 2001-04-17 | EP1287620A1 | 2003-03-05 | 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. | ||||||
| 96 | ASK modulation apparatus and method | EP99114770.3 | 1999-07-28 | EP0977408A3 | 2003-02-05 | Shiikuma, Kazumi; Yamasaki, Toyosaka |
A base band signal is frequency limited by a band limiting circuit 1. The waveform of this output signal rises and falls smoothly against a time axis. A driving circuit 2 functions as a buffer amplifier with voltage gain of 1 between the band limiting circuit 1 and ASK modulation circuit 3, and the output voltage wave is equal to the output waveform of the band limiting circuit 1. The ASK modulation circuit 3 turns on/off a field effect transistor 61 by the output signal voltage from the driving circuit 2, thereby discontinuing the carrier of the microwave band to be externally entered and performing ASK modulation (binary ASK), and provides a desired ASK modulated waveform as a result. |
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| 97 | POWER SUPPLY MODULATOR CIRCUIT FOR TRANSMITTER | EP94927986.3 | 1994-09-02 | EP0727108B1 | 2001-11-28 | JACOBSON, Herbert, P. |
| The present invention relates to a power supply modulator for a radio transmitter having apportioned input impedance and buffered switching of power modules. A series arrangement of power supply modules, conventionally disposed in a diode cascade, includes individual inductors to apportion the input impedance of the switching power supplies. The switching sequence of the power supplies is controlled by a FIFO buffer, with the sequentially adjacent power supplies being disposed physically remote so that current transients and thermal loads are more uniformly distributed. | ||||||
| 98 | Modulationsschaltung | EP00103652.4 | 2000-02-21 | EP1137167A1 | 2001-09-26 | Melcher, Gebhard; Kargl, Walter |
Die vorliegende Modulationsschaltung für einen Transponder weist nichtlineare Bauelemente auf, welche zwischen einem Schalt-Transistor (M5) und Spulenanschlüssen (LA, LB) angeordnet sind. Die sich daraus ergebende nichtlineare Modulationskennlinie hat eine höhere Reichweite zur Folge. Zur Einsparung von Chipfläche können als nichtlineare Bauelemente die an die Spule (L) angeschlossenen Dioden (M4, M3) eines Spannungs-Parallelreglers verwendet werden. Um unerwünschte, gegenseitige Beeinflussungen zwischen Spannungsregler und Modulationsschaltung zu unterbinden, ist eine gegenseitige Verriegelung derselben vorgesehen. |
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| 99 | AMPLITUDE MODULATOR | EP00949486.5 | 2000-08-14 | EP1125358A1 | 2001-08-22 | 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). | ||||||
| 100 | Integrierbare Oszillatorschaltung | EP84109769.4 | 1984-08-16 | EP0141933B1 | 1989-11-02 | Fenk, Josef, Dipl.-Ing.; Stepp, Richard, Dipl.-Ing. |
