| 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 | Amplifier circuit and wireless communication equipment | EP14153708.4 | 2011-11-30 | EP2728742A1 | 2014-05-07 | ONISHI, Masahiko |
Distortion compensation is performed taking into account a memory effect that occurs in a signal path other than an input-to-output path of an amplifier. An amplifier circuit 1 includes an amplifier 2 that amplifies a signal, a variable power supply 3 that varies a power supply voltage of the amplifier 2 in accordance with envelope change, and a distortion compensation section 4 that performs compensation for distortion characteristics. The distortion compensation section 4 performs the distortion compensation, based on an amplifier model which represents a memory effect that occurs on a path from a signal input port 2a of the amplifier 2 to a signal output port 2b thereof, and a memory effect that occurs on a path from a power supply port 2c of the amplifier 2 to the signal output port 2b thereof.
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| 122 | AMPLIFIER CIRCUIT AND WIRELESS COMMUNICATION DEVICE | EP11852193 | 2011-11-30 | EP2658118A4 | 2014-04-16 | ONISHI MASAHIKO |
| 123 | TIME AND AMPLITUDE ALIGNMENT IN ENVELOPE TRACKING AMPLIFICATION STAGE | EP12723153.8 | 2012-05-16 | EP2707947A1 | 2014-03-19 | BARTRAM, Ben |
| The invention relates to a method of calibrating an envelope path and an input path of an amplification stage including an envelope tracking power supply, the method comprising: generating input signals having a known relationship for each of the input and envelope paths; and varying an amplitude and a delay of the signal in one of the envelope and input paths in order to reduce the variation in the power detected in a signal at the output of the amplification stage. | ||||||
| 124 | Distortion compensation apparatus and method | EP09177251.7 | 2009-11-26 | EP2202878B1 | 2013-05-08 | Utsunomiya, Yuichi; Hamada, Hajime; Ishikawa, Hiroyoshi; Fudaba, Nobukazu; Nagatani, Kazuo |
| 125 | Mobile terminal and method of controlling a driving voltage of a power amplifier therein | EP11003252.1 | 2011-04-18 | EP2388911A2 | 2011-11-23 | Heo, Won; Kwon, Jonghun; Chin, Hungchol |
A mobile terminal and method of controlling a driving voltage of a power amplifier (220) therein are provided. The present invention includes a power amplifier module (220) having a plurality of operative modes, the power amplifier module (220) configured to amplify a power strength of an RF signal, a modem configured to deliver the RF signal to the power amplifier module (220), and to control the operative modes of the power amplifier module (220), a power detecting unit (230) configured to output a reference voltage by detecting the power strength of the RF signal outputted from the power amplifier module (220), and a DC/DC converter (240) configured to supply a driving voltage to the power amplifier module (220) by adjusting a detected power value according to a gain corresponding to each of the operative modes of the power amplifier module (220). Accordingly, a current consumption of a power amplifier module (220) is minimized, exothermic reaction is reduced in the course of a call, and a duration time of a battery is increased.
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| 126 | DYNAMIC SIGNAL CONTAMINATION SUPPRESSION | EP09837005.9 | 2009-12-22 | EP2377242A2 | 2011-10-19 | COWLEY, Nicholas; GOLDMAN, Richard J.; SAWYER, David; ROHANI, Nader |
| A self-configurable amplifier and method of amplification, including an RF signal level detector having an input connected to an RF signal, and an output configured to produce a control signal responsive to a power level of the RF signal. The control signal is supplied to a parametric adjustment circuit that includes an input connected to the control signal, and an output configured to provide a negative feedback responsive to the control signal. The negative feedback is supplied to an RF amplifier that includes an input forming an input of the self-configurable amplifier, an output forming an output of the self-configurable amplifier, and a control port connected to the output of the parametric adjustment circuit, such that one or more parameters of the RF amplifier is responsive to the negative feedback. | ||||||
| 127 | RF POWER AMPLIFIERS WITH LINEARIZATION | EP09767322.2 | 2009-05-27 | EP2297847A2 | 2011-03-23 | ALIDIO, Raul; DUPUY, Alexandre; GUMMALLA, Ajay; LEE, Woo Yong; ACHOUR, Maha |
| Designs and techniques associated with power amplifiers for amplifying RF signals to provide variable power amplification and improved linearity in various RF amplification circuits, including power amplifiers operated under the power back-off conditions. | ||||||
| 128 | MULTIPORT AMPLIFIERS IN COMMUNICATIONS SATELLITES | EP08737165.4 | 2008-05-02 | EP2145386A1 | 2010-01-20 | COUCHMAN, Alan, David; JONES, Daryl, Richard |
| Feedback loops are used within a Multiport Amplifier (MPA) of a Communications satellite to maintain phase and amplitude tracking and hence isolation and combining performance, at Ku and Ka-bands, for which there is increasing interest in MPA applications, and where wavelengths are short and maintenance of phase/amplitude tracking becomes highly challenging. Feedback loops are located at strategic points within the MPA Output Network (ONET) to detect tracking errors and provide compensation. Errors are detected through power measurements at 'null points', with zero power corresponding to accurate tracking. The feedback loops adjust the MPA phase/gains such that the levels at these points are maintained at zero. The scheme operates with a pilot signal for measurement of nulls, injected at one of the MPA inputs. | ||||||
| 129 | RF TRANSMITTER WITH VARIABLY BIASED RF POWER AMPLIFER AND METHOD THEREFOR | EP07758873.9 | 2007-03-20 | EP2025044A2 | 2009-02-18 | MCCALLISTER, Ronald Duane; BROMBAUGH, Eric M. |
| An RF transmitter (30) includes an RF power amplifier (32) for which the power input bias voltage (40) and signal input bias voltage (80) are controlled within feedback loops. A peak detector (44) generates a lowered-spectrum, peak-tracking signal (34) that follows the largest amplitude peaks of a wide bandwidth communication signal (16) but exhibits a lower bandwidth. This signal (34) is scaled in response to the operation of a drain bias tracking loop (146) then used to control a switching power supply (36) that generates the power input bias voltage. The tracking loop (146) is responsive to out-of-band power detected in a portion of the amplified RF communication signal (16'). A ratio of out-of-band power (128) to in-band power (126) is manipulated in the tracking loop (146) so that the power input bias voltage is modulated in a way that holds the out-of-band power at a desired predetermined level. | ||||||
| 130 | System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers | EP08151486.1 | 2008-02-15 | EP1959564A3 | 2008-11-19 | Nguyen, Dung C.; Yoon, Soon K.; Khanifar, Ahmad; Devendorf, Don. C. |
A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor (616) measuring ambient temperature of the PA, and an adaptive PA control processor (608) that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor (614) measures output power of the PA, and the control processor (608) dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.
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| 131 | VARIABLE GAIN AMPLIFIER AND ITS CONTROL METHOD | EP05787586.6 | 2005-09-30 | EP1931027A1 | 2008-06-11 | ARAI, Tomoyuki |
A variable gain amplifier has a first amplifier circuit (106) having a first field-effect transistor and amplifying a signal input to a gate of the first field-effect transistor to output; a gate bias control circuit (102) controlling a gate bias of the first amplifier circuit to control a gain of the first amplifier circuit; and a variable matching circuit (103) controlling a capacitor connected to the gate of the first amplifier circuit to control the gain of the first amplifier circuit. |
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| 132 | Communication terminal | EP05250885.0 | 2005-02-16 | EP1566892A1 | 2005-08-24 | Mori, Atsuya, c/o Sony Ericsson Mob. Com. Jp, Inc |
The present invention detects an APC control abnormality during transmission power control to prevent circuitry from becoming faulty or damaged and eliminates the need for a pre-shipment process, for instance, for threshold value adjustment and storage into memory with a view toward productivity improvement and production cost reduction. Disclosed is a cellular phone terminal that provides transmission power control. A CPU in the cellular phone terminal generates a predicted transmission power value corresponding to the power value to be transmitted through transmission power control, and compares the predicted transmission power value against a detection output value, which is obtained when a wave detector detects a transmission signal generated from a power amplifier. If the result of comparison indicates that the difference between the predicted transmission power value and detection output value is not smaller than a predetermined value, the CPU halts a signal transmission process. |
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| 133 | RF POWER AMPLIFIERS | EP07733659.2 | 2007-05-04 | EP2022168B1 | 2018-09-05 | SEYMOUR, Christopher David |
| A Solid State Power Amplifier (SSPA) for powering a single element of a multi-element antenna, the SSPA comprising: an RF amplifier, having a signal amplifying path that includes preamplifier, driver amplifier and a power output stage; an Electronic Power Conditioner (EPC) for providing a variable value of DC voltage for powering the power output stage of the RF amplifier; a control ASIC for receiving an input power signal of the RF amplifier for providing a voltage control signal to the EPC to determine the value of the DC voltage, the control ASIC addressing an EEPROM holding a collection of control words that define output values of a control output signal for varying values of said input power, such that the value of the DC voltage to the power output stage is varied so as to control the gain compression of the RF amplifier for varying values of input power in order to maintain constant amplifier linearity. | ||||||
| 134 | Automatic gain control circuit and method for automatic gain control | EP11189633.8 | 2011-11-17 | EP2595312B1 | 2018-02-28 | Helsloot, Michiel, Andre |
| A method of attenuating an input signal to obtain an output signal is described. The method comprises receiving the input signal, attenuating the input signal with a gain factor to obtain the output signal, applying a filter having a frequency response with a frequency-dependent filter gain to at least one of a copy of the input signal and a copy of the output signal to obtain a filtered signal, the frequency-dependent filter gain being arranged to emphasize frequencies within a number N of predetermined frequency ranges, N>1; wherein the filter comprises a sequence ofN sub-filters, each one of the N sub-filters having a frequency response adapted to emphasize frequencies within a corresponding one of the N predetermined frequency ranges; determining a signal strength of the filtered signal, and determining the gain factor from at least the signal strength. | ||||||
| 135 | TIME AND AMPLITUDE ALIGNMENT IN ENVELOPE TRACKING AMPLIFICATION STAGE | EP12723153.8 | 2012-05-16 | EP2707947B1 | 2017-08-30 | BARTRAM, Ben |
| 136 | POWER TRACKER FOR MULTIPLE TRANSMIT SIGNALS SENT SIMULTANEOUSLY | EP17163460.3 | 2014-01-30 | EP3203787A1 | 2017-08-09 | DOROSENCO, Alexander |
Techniques for generating a power tracking supply voltage for a circuit (e.g., a power amplifier) are disclosed. The circuit may process multiple transmit signals being sent simultaneously on multiple carriers at different frequencies. In one exemplary design, an apparatus includes a power tracker and a power supply generator. The power tracker determines a power tracking signal based on a plurality of polar modulated transmit signals being sent simultaneously. The power supply generator generates a power supply voltage based on the power tracking signal. The apparatus may further include a power amplifier (PA) that amplifies a modulated radio frequency (RF) signal based on the power supply voltage and provides an output RF signal.
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| 137 | POWER TRACKER FOR MULTIPLE TRANSMIT SIGNALS SENT SIMULTANEOUSLY | EP14704496.0 | 2014-01-30 | EP2954737B1 | 2017-06-21 | DOROSENCO, Alexander |
| 138 | MULTIPLE-PORT SIGNAL BOOSTERS | EP15824629.8 | 2015-07-23 | EP3172844A1 | 2017-05-31 | ASHWORTH, Christopher K.; VAN BUREN, Vernon |
| A system is disclosed that includes a first interface port, a second interface port, a signal splitter device, a main booster, and a front-end booster. The signal splitter device may include first, second, and third splitter ports. The signal splitter device may be configured such that a first direction signal received at either of the second and third splitter ports is output at the first splitter port and a second direction signal that is received at the first splitter port is output at each of the second and third splitter ports. The main booster may include main first and second direction amplification paths that are each communicatively coupled between the first splitter port and the first interface port. The front-end booster may include front-end first and second direction amplification paths that are each communicatively coupled between the second splitter port and the second interface port. | ||||||
| 139 | A TEMPERATURE INDEPENDENT CMOS RADIO FREQUENCY POWER DETECTOR | EP13869480 | 2013-12-31 | EP2918017A4 | 2015-12-02 | SUNG ERIC |
| 140 | Amplifier circuit and wireless communication equipment | EP14153716.7 | 2011-11-30 | EP2728744A1 | 2014-05-07 | Onishi, Masahiko |
Distortion compensation is performed taking into account a memory effect that occurs in a signal path other than an input-to-output path of an amplifier. An amplifier circuit 1 includes an amplifier 2 that amplifies a signal, a variable power supply 3 that varies a power supply voltage of the amplifier 2 in accordance with envelope change, and a distortion compensation section 4 that performs compensation for distortion characteristics. The distortion compensation section 4 performs the distortion compensation, based on an amplifier model which represents a memory effect that occurs on a path from a signal input port 2a of the amplifier 2 to a signal output port 2b thereof, and a memory effect that occurs on a path from a power supply port 2c of the amplifier 2 to the signal output port 2b thereof.
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