| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | 저왜곡 용량성 신호 소스 증폭기를 위한 시스템 및 방법 | KR1020120092515 | 2012-08-23 | KR101459831B1 | 2014-11-07 | 세발로스호세루이스; 크롭피치마이클 |
| 실시예에 따르면, 방법은 용량성 신호 소스에 의해 제공된 신호를 증폭하여 증폭된 신호를 형성하는 단계와, 증폭된 신호의 피크 전압을 검출하는 단계와, 피크 전압의 검출에 응답하여 용량성 신호 소스의 출력에 연결된 제어 가능한 임피던스를 조정하는 단계를 포함한다. 제어 가능한 임피던스는 검출된 피크 전압에 반비례하는 값으로 조정된다.
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| 142 | 오디오 앰프 출력 제어 장치 및 방법 | KR1020090127893 | 2009-12-21 | KR1020110071347A | 2011-06-29 | 이성윤 |
| PURPOSE: An audio amplifier output control apparatus and a method thereof are provided to improve no-sound and malfunction of the amplifier, by removing harmonic noise components through fast Fourier transform. CONSTITUTION: An audio amplifier(100) amplifies an audio signal. The audio amplifier outputs the amplified signal to a speaker. A current detection part(50) monitors current variation of Vcc supplied to the audio amplifier. An FFT(Fast Fourier Transform) band analysis part(20) transforms the audio signal into a frequency domain signal. The FFT band analysis part detects an input frequency component. A control part(40) judges shut down entry of the audio amplifier. The control part outputs a PWM(Pulse Width Modulation) control signal with a duty corresponding to the detected component and the input frequency component. An input signal filter part(70) removes the component of the audio signal and the input frequency component by shifting a cutoff frequency. | ||||||
| 143 | 선형 전력 증폭기 제어 방법 | KR1020077002330 | 2005-08-23 | KR100876125B1 | 2008-12-29 | 올섬,앤드류; 도모코스,존 |
| A linear power amplifier filters an instantaneous input signal to generate a filtered input signal, combines the instantaneous input signal and filtered input signal to generate a modified drain source voltage waveform and modulates a switched mode power supply to the linear power amplifier in accordance with the modified waveform. | ||||||
| 144 | 지상파 튜너의 부스터회로 | KR1020060092262 | 2006-09-22 | KR1020080026968A | 2008-03-26 | 최석동 |
| A booster circuit for a terrestrial tuner is provided to attenuate or block the intensity of a signal previously through a rejection filter before the signal with a strong input intensity is amplified by a booster when the unnecessary strong intensity of signal is inputted except a broadcasting channel signal received through an antenna, thereby preventing interference between the unnecessary signal and the broadcasting channel signal and an oscillator killing phenomenon. A booster circuit for a terrestrial tuner comprises a loop-through(20), a citizen band filter(21), a rejection filter(22) and a booster(23). The loop-though outputs a broadcasting channel signal inputted from an antenna(ANT) to other devices. The citizen band filter removes a citizen band signal from a broadcasting channel signal inputted through an antenna. The rejection filter attenuates a frequency band in which there is no broadcasting signal in the broadcasting channel signal. The booster amplifies the broadcasting channel signal outputted from the rejection filter. | ||||||
| 145 | 동축케이블을 이용한 디지털 비디오 레코더 시스템 | KR1020060060634 | 2006-06-30 | KR1020080002065A | 2008-01-04 | 박종배 |
| A DVR(Digital Video Recorder) system using a coaxial cable is provided to reduce installation costs of the system by constructing the DVR system by using one single coaxial cable, and control two-way communication between a remote video camera and one cam by using the coaxial cable. A coaxial cable loads a coaxial cable signal on one single transmission path, and transmits the signal. In the coaxial cable signal, a power signal as a power source of a digital video camera(410), a ground signal functioning as a ground, a signal of a video photographed by the digital video camera, a predetermined communication signal(transmitting signal and receiving signal), and a trigger signal as a photographing command signal for the digital video camera are overlapped. A remote control terminal(500) remotely controls operations of the remote digital video camera, receives a signal of a photographed video, and transmits the power signal, the ground signal, the transmitting signal, the receiving signal and the trigger signal. A one cam(400) includes the digital video camera photographing the video, and performs two-way communication with the remote control terminal through the coaxial cable. | ||||||
| 146 | MULTIMODE VOLTAGE CONTROLLED OSCILLATOR | EP16820488.1 | 2016-12-13 | EP3391535A1 | 2018-10-24 | TAN, Jun |
| Features and advantages of the present disclosure include a multimode voltage controlled oscillator (VCO). In one embodiment, a circuit comprises a VCO, first and second transistors, and first and second capacitive attenuators. The first and second transistors are cross coupled through the attenuators. In a first mode, the first and second transistors are turned off, and the capacitive attenuators attenuate a signal on output terminals of the VCO at control inputs of the first and second transistors. In another mode, the first and second transistors are turned on, and the capacitive attenuation is reduced or turned off so that control inputs of the first and second transistors receive signals on the outputs of the VCO. | ||||||
| 147 | BROADBAND ENVELOPE TRACKING | EP16198285.5 | 2016-11-10 | EP3168985B1 | 2018-10-24 | PRATT, Patrick; BRANNON, Joseph Bradford; TURNER, Ronald Dale |
| An envelope tracking scheme can be used, such as to modulate a supply node of a power amplifier circuit to improve efficiency. For example, a magnitude or amplitude envelope of a signal to be modulated can be scaled and used to drive a node, such as a drain, of the power amplifier circuit. An envelope tracking signal can be generated such as having a bandwidth that is compressed as compared to a full-bandwidth envelope signal. A peak-value "look ahead" technique can be used, for example, so that amplitude compression or clipping of the transmit signal is suppressed when the bandwidth-compressed envelope tracking signal is used to modulate a supply node of the power amplifier used to amplify the transmit signal. | ||||||
| 148 | SENSOR CONTROL CIRCUIT AND ELECTRONIC APPARATUS | EP14868241.2 | 2014-12-01 | EP3079133B1 | 2018-10-17 | WANG, Xueyan; ZHANG, Weiyan |
| A sensor control circuit comprises a sensor (201), a filtering circuit (202), a buffering circuit (203), and an amplifying circuit (204). An output end of the sensor (201) is connected to an input end of the filtering circuit (202), an output end of the filtering circuit (202) is connected to an input end of the buffering circuit (203), and an output end of the buffering circuit (203) is connected to an input end of the amplifying circuit (204). Because the buffering circuit (203) is disposed between the filtering circuit (202) and the amplifying circuit (204), the sensor circuit has an advantage of full sampling. Further provided is an electronic apparatus using the sensor control circuit. | ||||||
| 149 | OPERATIONAL AMPLIFIER BASED CIRCUIT WITH COMPENSATION CIRCUIT BLOCK USED FOR STABILITY COMPENSATION | EP15191878.6 | 2015-10-28 | EP3021482B1 | 2018-09-19 | Yu, Chi-Yao |
| An operational amplifier based circuit (100) has an operational amplifier (102), a feedback circuit (104), and a compensation circuit block (106). The feedback circuit (104) is coupled between an output port and an input port of the operational amplifier (102). The compensation circuit block (106) has circuits involved in stability compensation of the operational amplifier (102), wherein there is no stability compensation circuit driven at the output port of the operational amplifier (102). | ||||||
| 150 | Amplifier | EP14184102.3 | 2014-09-09 | EP2858237B1 | 2018-03-21 | Kawano, Yoichi; Yamaura, Shinji |
| An amplifier includes two input terminals (101A, 101B) to receive a differential, two-tone transmission signal; two output terminals (102A, 102B); a coil (131) having terminals connected with the input terminals (101A, 101B), respectively, and a center tap (131A); a first transistor (120A) having the gate connected with one terminal of the coil (131), and the output terminal connected with one of the two output terminals (102A, 102B); a second transistor (120B) having the gate connected with the other terminal of the coil (131), and the output terminal connected with the other output terminal of the two output terminals (102A, 102B); a diode (132) having a terminal connected with the center tap (131A); and a bias circuit (140) connected with the other terminal of the diode (132). The diode (132) adjusts the terminal voltage depending on a signal level of a double harmonic wave of the transmission signal. | ||||||
| 151 | LINEARIZING SCHEME FOR BASEBAND FILTER WITH ACTIVE FEEDBACK | EP16714098.7 | 2016-03-08 | EP3278453A1 | 2018-02-07 | ASURI, Bhushan Shanti; JOSHI, Alok Prakash; RAJENDRAN, Gireesh |
| A method and apparatus for linearizing a baseband filter are provided. The apparatus is configured to, via a first conducting module, receive a first current signal. The apparatus is further configured to, via a converting module, receive a second current signal, generate a voltage signal based on the second current signal, and apply the voltage signal to the first conducting module. An amount of the second current signal received by the converting module is based on an amount of the first current signal flowing through the first conducting module. The apparatus is also configured to, via a second conducting module, control an output current signal based on the voltage signal. The output current signal is controlled to be a linear replica of the first current signal for in-band frequencies. | ||||||
| 152 | AMPLIFIERS | EP16166615.1 | 2016-04-22 | EP3236585A1 | 2017-10-25 | Splithof, Mike |
A chopper amplifier and method of operation are described. The chopper amplifier comprises a first chopper arranged to modulate an input signal using a first chopper signal having a chopper frequency. An amplification stage has an input arranged to receive the chopped signal and an output, and supplies an amplified signal at the output. An output chopper is arranged to integrate the amplified signal using a second chopper signal having the chopper frequency to generate an amplified output signal. The amplification stage is further configured to filter the chopped signal to attenuate signal components having frequencies lower than the chopper frequency.
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| 153 | DETECTION OF EXCESSIVELY HIGH INTERFERENCE SIGNAL LEVELS DURING RECEPTION OF GLOBAL NAVIGATION SATELLITE SYSTEM SIGNALS | EP14907358.7 | 2014-12-04 | EP3228000A1 | 2017-10-11 | SOKOLOV, Andrey Mikhailovich; TATARNIKOV, Dmitry Vitalievich; BACHMANOV, Konstantin Mikhailovich; YUSUPOV, Rifat Khaidarovich |
| A high-linear amplifier receives, from an input bandpass filter, input signals including weak process signals and strong interference signals, amplifies the input signals, and transmits the amplified signals to an output bandpass filter. The high-linear amplifier includes a transistor and a feedback circuit that stabilizes the operating current of the transistor. The operating current includes the direct-current and low-frequency output signal currents of the transistor. The feedback circuit includes an interference detector that rectifies a portion of the high-frequency output signals of the transistor and extends the linear range of the high-linear amplifier. An interference indicator unit alerts an operator to the presence of excessively high levels of interference before the high-linear amplifier enters the non-linear mode. Amplified signals rejected by the output bandpass filter are reflected back to the high-linear amplifier stage. A directional coupler prevents the reflected signals from disrupting the operation of the interference detector. | ||||||
| 154 | RECEIVER CIRCUIT | EP15175944.6 | 2015-07-08 | EP3116127A1 | 2017-01-11 | Peter, Matthias; Thalheim, Jan |
A data communications receiver (102) including a receiver coil, a first amplification stage (110) coupled to the receiver coil, the first amplification circuitry to differentially amplify at least part of signal received (104) by the receiver coil relative to a threshold, a second amplification stage (112) coupled to receive the differentially amplified signal (U1) from the first amplification stage (110), the second amplification stage (112) comprising a current mirror, and hysteretic level shifting circuitry to shift a level of part of the signal received by the receiver coil, the threshold or part of the signal received by the receiver coil and the threshold such that, in response to the at least part of the signal received by the receiver coil having crossed the threshold, a threshold crossing in the other direction is delayed.
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| 155 | AMPLIFIER DEVICE | EP14825356.0 | 2014-12-24 | EP3108652A1 | 2016-12-28 | ARIESEN, Jan; BOSKALJON, Gerrit; RIJSSEMUS, Martien |
| There is provided an amplifier device (30) for a CATV network comprising a first amplifier element (38) for upstream signals and a second amplifier element (36) for downstream signals, wherein the first and second amplifier elements (38, 36) are disposed between first and second directional couplers (34, 32). The combined isolation of the first and second directional couplers (34, 32) is greater than the sum of the gain of the first and second amplifier elements (38, 36). The first directional coupler (34) has one port (40) attached to an input (42) of the downstream amplification element (36) and one port (44) attached to an output (46) of an upstream amplification element (38) and the second directional coupler (32) has one port (150) attached to an output (52) of the downstream amplifier (36) and one port (54) attached to an input (56) of the upstream amplifier (38). | ||||||
| 156 | Harmonics Cancellation Circuit for a Power Amplifier | EP13196361.3 | 2013-12-10 | EP2884659B1 | 2016-08-24 | Ba, Ao |
| 157 | MULTIBAND POWER AMPLIFIER DEVICE | EP13887733 | 2013-06-27 | EP3002873A4 | 2016-07-06 | WANG KUN; WU DI; ZHU ERNI |
| The present invention provides a multiband power amplification apparatus, so as to consider both efficiency improvement and a linearity requirement. The apparatus further includes a first input terminal, a second input terminal, a first adjustment module, a second adjustment module, a first adder, and a second adder, where the first input terminal receives a signal in a frequency band f 1 and then outputs the signal in the frequency band f 1 to a first digital predistortion module; the second input terminal receives a signal in a frequency band f 2 and then outputs the signal in the frequency band f 2 to a second digital predistortion module; the first adjustment module adjusts a first channel of signal and then outputs an adjusted first channel of signal to the first adder; the second adjustment module adjusts a third channel of signal and then outputs an adjusted third channel of signal to the first adder; the first adder converges the signal adjusted by the second adjustment module and the signal output by the first adjustment module and then outputs a converged signal to a first digital-to-analog converter; and the second adder converges a second channel of signal and a fourth channel of signal and then outputs a converged signal to a second digital-to-analog converter. According to the apparatus, design performance of an inter-band power amplifier can be improved, types of power amplifiers can be reduced, and costs can be reduced. | ||||||
| 158 | SUPPRESSION OF SPURIOUS HARMONICS GENERATED IN TX DRIVER AMPLIFIERS | EP14750265.2 | 2014-07-18 | EP3025425A1 | 2016-06-01 | VORA, Sameer Vasantlal; LAU, Wing Fat Andy |
| The transmission path of a communication device includes, in part, N upconverters each of which receives M phases of a signal to be transmitted. Each upconverter further receives one of N sets of phases of a LO signal. Each of the N sets includes M phases of the LO signal. The communication device further includes at least one combiner, and N amplifiers each responsive to a different one of the N upconverters to generate N amplified signals. The combiner combines the N amplified signals to generate an output signal. By selecting the gain of one of the amplifiers to be different than the gain of the remaining amplifiers, the undesired harmonics of the signal to be transmitted, caused by non-linearity of the amplifiers, is reduced. Each upconverter optionally includes a multitude of upconverters whose outputs are combined to further reduce the spurious harmonic upconversion products and the counter-intermodulation distortion (IM3). | ||||||
| 159 | MULTIBAND POWER AMPLIFIER DEVICE | EP13887733.7 | 2013-06-27 | EP3002873A1 | 2016-04-06 | WANG, Kun; WU, Di; ZHU, Erni |
The present invention provides a multiband power amplification apparatus, so as to consider both efficiency improvement and a linearity requirement. The apparatus further includes a first input terminal, a second input terminal, a first adjustment module, a second adjustment module, a first adder, and a second adder, where the first input terminal receives a signal in a frequency band f1 and then outputs the signal in the frequency band f1 to a first digital predistortion module; the second input terminal receives a signal in a frequency band f2 and then outputs the signal in the frequency band f2 to a second digital predistortion module; the first adjustment module adjusts a first channel of signal and then outputs an adjusted first channel of signal to the first adder; the second adjustment module adjusts a third channel of signal and then outputs an adjusted third channel of signal to the first adder; the first adder converges the signal adjusted by the second adjustment module and the signal output by the first adjustment module and then outputs a converged signal to a first digital-to-analog converter; and the second adder converges a second channel of signal and a fourth channel of signal and then outputs a converged signal to a second digital-to-analog converter. According to the apparatus, design performance of an inter-band power amplifier can be improved, types of power amplifiers can be reduced, and costs can be reduced. |
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| 160 | Extended bandwidth adaptive digital pre-distortion with reconfigurable analog front-ends | EP14195033.7 | 2014-11-26 | EP2876853A1 | 2015-05-27 | Omer, Mohammed; Devison, Stephen Arnold; Holisaz, Hamed; Kravets, Oleksiy |
A pre-distortion method. A signal to be transmitted Tx is pre-distorted to compensate for nonlinearities of a transmitter. The pre-distorted signal is filtered by an EBEE filter and a baseband filter. The EBEE filter has a filter characteristic of that cancels the baseband filter response over the range of frequencies from a first corner frequency of the baseband filter to a frequency of N*fB where N is a highest order of distortion component being cancelled and fB is the bandwidth of the original signal to be transmitted. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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