| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | DEMODULATIONS- UND VERSTÄRKERUNGSREGELKONZEPT, INSBESONDERE FÜR IR-EMPFÄNGER | EP06723964.0 | 2006-04-03 | EP1867121A1 | 2007-12-19 | KURZ, Alexander |
| The invention relates to a method for the amplification and demodulation of amplitude-modulated signals (10) having the following steps: Amplification of a primary signal to give an amplified signal, bandpass filtering of the amplified signal to give a filtered signal, comparison of the filtered signal with a regulation threshold value (R) and regulation of the amplification of the primary signal such that peak values for the filtered signal approximate the regulation threshold value (R), comparison of the filtered signal with a signal threshold value (S_I, -S_I) and demodulation of the comparison result. The circuit (12) is characterized by the fact that the signal threshold value (S_I, -S_I) is lower than the regulation threshold value (R). The invention also relates to a method with which the circuit (12) is operated. | ||||||
| 102 | SYSTEM AND METHOD FOR CURRENT-MODE AMPLITUDE MODULATION | EP05769416.8 | 2005-07-11 | EP1776753A1 | 2007-04-25 | PEHLKE, David R.; HADJICHRISTOS, Aristotele |
| An amplifier circuit includes a power amplifier biased for saturated mode operation, and a controllable current source to provide supply current to the power amplifier. The controllable current source effects desired amplitude modulation of the output signal from the power amplifier by modulating the supply current it provides responsive to an amplitude information signal. In one or more embodiments, the current source includes a circuit that is configured to adjust one or more transmitter operating parameters responsive to detecting changes in the effective DC resistance of the power amplifier. For example, the circuit may generate a compensation signal that reduces the effective DC resistance responsive to detecting that the effective DC resistance has undesirably increased. By way of non-limiting examples, such compensation may be effected by changing a current mirror, an amplifier-to-antenna impedance matching, an amplifier bias or device size, or imposing some form of transmit signal back-off. | ||||||
| 103 | AMPLIFIER CIRCUIT FOR AM BROADCASING | EP01272899.4 | 2001-12-27 | EP1349267B1 | 2007-03-21 | IKEDA, Takeshi; MIYAGI, Hiroshi |
| An amplifier circuit for AM broadcasting for amplifying an inputted AM broadcast signal by an FET and outputting it. The amplifier circuit comprises FETs for signal amplification which are P-channel MOSFETs (4, 5) of relatively small flicker noise. While suppressing the flicker noise to a lowest possible level, more circuits including the RF amplifier for AM broadcasting can be integrated on one chip, thereby realizing small size and low noise of the circuits. | ||||||
| 104 | Wireless communication apparatus | EP03019645.5 | 2003-09-05 | EP1396932A3 | 2005-10-12 | Suzuki, May, Hitachi, Ltd.; Tanaka, Satoshi, Hitachi, Ltd.; Yamawaki, Taizo, Hitachi, Ltd.; Tanoue, Tomonori, Hitachi, Ltd. |
A linear system and an EER system are used in combination such that the EER system can also be used in a cellular phone with a wide output dynamic range. In the EER system, linear control of an amplifier (909) becomes difficult in the low output range. Thus, use of the EER system is limited to the high output range, and the linear system is used in the low output range as in the past. The power efficiency is improved while requirements of linearity are satisfied by this structure. An effective circuit structure is proposed for a switching control system for two systems. In addition, an up-converter (911) is constituted in combination with a step-down element (912) with high responsiveness, whereby a power supply voltage control circuit for the EER system with a wide control range and high responsiveness is provided. |
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| 105 | Wireless communication apparatus | EP03019645.5 | 2003-09-05 | EP1396932A2 | 2004-03-10 | Suzuki, May, Hitachi, Ltd.; Tanaka, Satoshi, Hitachi, Ltd.; Yamawaki, Taizo, Hitachi, Ltd.; Tanoue, Tomonori, Hitachi, Ltd. |
A linear system and an EER system are used in combination such that the EER system can also be used in a cellular phone with a wide output dynamic range. In the EER system, linear control of an amplifier (909) becomes difficult in the low output range. Thus, use of the EER system is limited to the high output range, and the linear system is used in the low output range as in the past. The power efficiency is improved while requirements of linearity are satisfied by this structure. An effective circuit structure is proposed for a switching control system for two systems. In addition, an up-converter (911) is constituted in combination with a step-down element (912) with high responsiveness, whereby a power supply voltage control circuit for the EER system with a wide control range and high responsiveness is provided. |
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| 106 | AMPLIFICATION SYSTEMS AND METHODS USING FIXED AND MODULATED POWER SUPPLY VOLTAGES AND BUCK-BOOST CONTROL | EP01957360.9 | 2001-07-31 | EP1364456A2 | 2003-11-26 | DENT, Paul, W.; CAMP, William, O., Jr. |
| A signal of varying amplitude in a first saturated power amplifier that operates from a fixed voltage power supply to produce a first output signal of constant amplitude. The signal of varying amplitude also is amplified in a second saturated power amplifier that operates from a modulated voltage power supply, to produce a second output signal of amplitude that depends on the signal of varying amplitude, a modulated power supply voltage, and on an invert/noninvert control signal. The first and second output signals are combined into a load. The modulated voltage power supply is modulated while generating the invert/noninvert control signal, such that the combined first and second output signals into the load amplify the signal of varying amplitude. The signal of varying amplitude also may be of varying amplitude and varying phase. | ||||||
| 107 | Amplitude modulator using a bipolar transistor | EP01307529.6 | 2001-09-05 | EP1211800A3 | 2003-02-05 | Carbonini, Lorenzo |
An amplifier apparatus 30 comprises a diode 31 and a transistor 35. In operation, a pulsed signal 57 is applied to the diode 31 and a modulating signal 45 is applied to the collector 40 of the transistor 45. A low level version of the modulating signal 45, as indicated by driving signal 49, serves to pilot the attenuation characteristics of the diode 31 such that it attenuates the pulsed signal 57 during its rising and falling periods in order to produce an attenuated signal 59. Accordingly, when the current through the diode 31 is relatively high the diode 31 has low resistance and the signal 57 is not attenuated and when the current through the diode 31 is relatively low then the diode 31 exhibits a relatively higher resistance and the signal 57 is strongly attenuated. |
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| 108 | HIGH-EFFICIENCY POWER MODULATORS | EP01905353.7 | 2001-02-02 | EP1262018A2 | 2002-12-04 | MCCUNE, Earl, W., Jr.; SANDER, Wendell, B. |
| The present invention, generally speaking, incorporates the power amplifier as a fundamental constituent of a modulator, using polar modulation techniques. Thus, it is possible to achieve the combination of precision signal generation (including envelope variations) along with high energy efficiency in combinations not possible heretofore. In accordance with one embodiment of the invention, a modulated radio (passband) signal generator produces high quality signals of general type, which specifically includes signals with varying envelopes. Signals are generated with high energy efficiency in the conversion of applied DC power to output RF signal power. The result is longer battery life for products such as mobile phone handsets. Dramatically improved efficiency also allows for a dramatic reduction (10 to 1 or greater) in the size of any required heatsink for the radio transmitter, which significantly lowers both cost and size. Furthermore, continuous operation of these radio transmitters is made possible with small temperature rises using small heatsinks, or even without any heatsink components. This provides for high operating reliability, as well as for greater throughput due to the longer operating time allowed. Another aspect of the invention allows the generation of high quality signals with wide bandwidth, without the need for continuous feedback during operation. This further reduces costs by greatly simplifying the design, manufacturing, and complexity of the transmitter circuitry. | ||||||
| 109 | LINEAR RF AMPLIFIER WITH POLAR FEEDBACK | EP08754245.2 | 2008-05-08 | EP2151047B1 | 2017-09-06 | LANE, John, R.; OVERSTREET, William, P. |
| 110 | TIME AND AMPLITUDE ALIGNMENT IN ENVELOPE TRACKING AMPLIFICATION STAGE | EP12723153.8 | 2012-05-16 | EP2707947B1 | 2017-08-30 | BARTRAM, Ben |
| 111 | POWER VOLTAGE FORMING DEVICE AND POLAR MODULATION TRANSMISSION DEVICE | EP08710604.3 | 2008-01-29 | EP2120335B1 | 2015-06-10 | IKEDO, Taichi; MATSUOKA, Akihiko |
| 112 | SWITCHING AMPLIFIER, AND TRANSMITTER USING SAME | EP13794743.8 | 2013-04-05 | EP2858239A1 | 2015-04-08 | HORI, Shinichi |
The present invention is applied to a switching amplifier that includes a first high-side gate and a first low-side gate having output terminals connected together, and a high-side driver and a low-side driver that drive the first high-side gate and the first low-side gate, respectively. In the switching amplifier of the present invention, the high-side driver includes an input switching amplifier that uses the output terminal of the first high-side gate as a power source. |
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| 113 | Amplifying circuit, AC signal amplifying circuit and input bias adjusting method | EP10159029.7 | 2010-04-01 | EP2244378A3 | 2012-10-31 | Hongo, Hironobu; Ishidoh, Katsutoshi |
An amplifying circuit 1 includes: an amplifying unit 20 which amplifies an input signal and applies the amplified signal to a designated load; a current detection unit 14 which detects a load current that flows into the designated load upon application of the amplified signal; an estimating unit 30 which calculates, based on the voltage level of the input signal, an estimated value of the load current to be supplied to the load; and an adjusting unit 32 which adjusts an input bias, to be applied to the amplifying unit 20, in such a manner so as to reduce a difference value representing a difference between the estimated value and the loud current detected by the current detection unit 14.
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| 114 | AMPLITUDE MODULATION CONTROLLER FOR POLAR TRANSMITTER USING COARSE AND FINE POWER CONTROL | EP08851801.4 | 2008-11-21 | EP2218173B1 | 2011-11-16 | RYTER, Roland |
| Apparatus (170) for generating a modulation signal for use in modulating the power supply of a power amplifier (160) uses coarse and fine control for controlling the amplitude of the modulation signal, and thereby controlling the output power of the power amplifier (160). The modulation signal may be generated in the digital domain and converted to the analogue domain by a digital-to-analogue converter (20), with the digital-to-analogue converter (20) providing the fine control and a variable gain amplifier (40) providing the coarse control of the analogue signal. | ||||||
| 115 | IMPROVED AMPLIFYING DEVICE | EP07835369 | 2007-10-26 | EP2212992A4 | 2011-11-02 | GUSTAVSSON ULF |
| 116 | DUAL MODE POWER AMPLIFIER | EP08755494 | 2008-05-15 | EP2151049A4 | 2011-04-06 | LEE MEELAN; SI WILLIAM W; WEBER DAVID J |
| 117 | RF power amplifier for wireless communication apparatus | EP06017550.2 | 2003-09-05 | EP1755214B1 | 2011-03-02 | Suzuki, May c/o Hitachi, Ltd., IPG; Tanaka, Satoshi c/o Hitachi, Ltd., IPG; Yamawaki, Taizo c/o Hitachi, Ltd., IPG; Tanoue,Tomonori c/o Hitachi, Ltd., IPG |
| A linear system and an EER system are used in combination such that the EER system can also be used in a cellular phone with a wide output dynamic range. In the EER system, linear control of an amplifier (909) becomes difficult in the low output range. Thus, use of the EER system is limited to the high output range, and the linear system is used in the low output range as in the past. The power efficiency is improved while requirements of linearity are satisfied by this structure. An effective circuit structure is proposed for a switching control system for two systems. In addition, an up-converter (911) is constituted in combination with a step-down element (912) with high responsiveness, whereby a power supply voltage control circuit for the EER system with a wide control range and high responsiveness is provided. <IMAGE> | ||||||
| 118 | POWER AMPLIFIER CONTROLLER WITH POLAR TRANSMITTER | EP08831707.8 | 2008-09-03 | EP2191575A1 | 2010-06-02 | VINAYAK, Vikas; DROGI, Serge, Francois; TOMASZ, Martin |
| A power amplifier controller controls a power amplifier and is coupled to a polar modulator. The polar modulator generates an amplitude component and a phase-modulated component of the desired RF modulated signal, and outputs to the power amplifier controller. The power amplifier controller regenerates a combined phase and amplitude modulated RF signal to generate an input signal to a power amplifier by adjusting the gain of a VGA based on the amplitude component of the desired RF modulated signal. Concurrently, the power amplifier controller both controls an adjusted supply voltage to the PA and adjusts the gain of the VGA based upon an amplitude correction signal or amplitude error signal. | ||||||
| 119 | POWER VOLTAGE FORMING DEVICE AND POLAR MODULATION TRANSMISSION DEVICE | EP08710604 | 2008-01-29 | EP2120335A4 | 2010-02-03 | IKEDO TAICHI; MATSUOKA AKIHIKO |
| 120 | AMPLIFICATION SYSTEMS AND METHODS USING FIXED AND MODULATED POWER SUPPLY VOLTAGES AND BUCK-BOOST CONTROL | EP01957360.9 | 2001-07-31 | EP1364456B1 | 2009-11-04 | DENT, Paul, W.; CAMP, William, O., Jr. |
