| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | 开关放大器 | CN200780037896.9 | 2007-08-31 | CN101523723A | 2009-09-02 | 克莱德·威特查尔德 |
| 一种包括调制器的开关放大器，该调制器包括脉冲发生器。该脉冲发生器生成正脉冲和负脉冲以响应输入信号，并且该负脉冲频率可以独立于所述正脉冲的频率被控制。所述正脉冲和负脉冲被组合以形成复合脉冲流，可对该复合脉冲流进行低通滤波，以使滤波器的输出为输入信号的放大形式。 | ||||||
| 2 | Audio signal correction and calibration for a room environment | US15641271 | 2017-07-04 | US10028055B2 | 2018-07-17 | Fawad Nackvi |
| Disclosed are an apparatus and method of processing an audio signal to optimize audio for a room environment. One example method of operation may include recording the audio signal generated within a particular room environment and processing the audio signal to create an original frequency response based on the audio signal. The method may also include identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response, determining whether the target sub-region is a narrow energy region, creating a filter to adjust the frequency response, and applying the filter to the audio signal. | ||||||
| 3 | AMPLIFICATION PHASE CORRECTION IN A PULSE BURST | US15271481 | 2016-09-21 | US20170012586A1 | 2017-01-12 | Chang Ru Zhu |
| An apparatus includes a circuit and a shifter. The circuit may be configured to generate a control signal based on a reference voltage and a plurality of characteristics of an amplifier. The shifter may be configured to (i) receive an input signal carrying a pulse burst having a plurality of pulses, (ii) shift a plurality of phases of the pulses in the pulse burst in response to the control signal, and (iii) present the pulses as shifted in an output signal. | ||||||
| 4 | Audio signal correction and calibration for a room environment | US14706251 | 2015-05-07 | US09414164B2 | 2016-08-09 | Fawad Nackvi |
| Disclosed are an apparatus and method of processing an audio signal to optimize audio for a room environment. One example method of operation may include recording the audio signal generated within a particular room environment and processing the audio signal to create an original frequency response based on the audio signal. The method may also include identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response, determining whether the target sub-region is a narrow energy region, creating a filter to adjust the frequency response, and applying the filter to the audio signal. | ||||||
| 5 | 半導体集積回路、オーディオアンプ回路、電子機器 | JP2015124952 | 2015-06-22 | JP2017009440A | 2017-01-12 | 加藤 武徳 |
| 【課題】組み立て工程後に電気的特性を検査/解析可能な半導体集積回路を提供する。 【解決手段】パルス変調器320は、アナログ電圧VINを受け、アナログ電圧VINに応じて変調されたパルス信号S1を生成する。出力段330は、パルス信号S1に応じたスイッチング信号S2を、出力端子OUTに発生させる。半導体集積回路300は、パルス変調器320に対するアナログ電圧VINとして、(i)通常動作時に使用すべきメイン信号VMAINが入力される通常モードと、(ii)半導体集積回路300内において生成される少なくともひとつの内部アナログ信号VAUXが入力されるテストモードとが切りかえ可能である。 【選択図】図2 |
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| 6 | Switching power amplifier device and a method of controlling the same | JP2011518654 | 2009-07-16 | JP2011528526A | 2011-11-17 | パク，ヘ−グァン |
| パワー増幅部の非線形性を除去するためのスイッチングパワー増幅装置を提供する。 該スイッチングパワー増幅装置は、入力オーディオ信号を、所定のキャリア周波数を有するパルス幅変調信号に変換し、パルス幅変調信号に備えられたオーディオ信号と負帰還された出力オーディオ信号との差値を補正して、補正されたパルス幅変調信号を出力し、補正されたパルス幅変調信号に備えられた高周波成分を除去し、所定のキャリア周波数と異なるスイッチング周波数を有するように、補正されたパルス幅変調信号を変調し、変調されたパルス幅変調信号の電力を増幅することを特徴とする。 | ||||||
| 7 | スイッチングパワー増幅装置 | JP2015146878 | 2015-07-24 | JP2015181320A | 2015-10-15 | パク,ヘ−グァン |
| 【課題】 パワー増幅部の非線形性を除去するためのスイッチングパワー増幅装置を提供する。 【解決手段】 スイッチングパワー増幅装置は、入力オーディオ信号を、所定のキャリア周波数を有するパルス幅変調信号に変換し、パルス幅変調信号に備えられたオーディオ信号と負帰還された出力オーディオ信号との差値を補正して、補正されたパルス幅変調信号を出力し、補正されたパルス幅変調信号に備えられた高周波成分を除去し、所定のキャリア周波数と異なるスイッチング周波数を有するように、補正されたパルス幅変調信号を変調し、変調されたパルス幅変調信号の電力を増幅することを特徴とする。 【選択図】 図4 |
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| 8 | Switching amplifier | JP2009527189 | 2007-08-31 | JP2010503302A | 2010-01-28 | クライド ウィチャード， |
| スイッチング増幅器は、パルス発生器を含む変調器を含む。 パルス発生器は、入力信号に応答して、正及び負のパルスを発生し、負のパルスの周波数は、正のパルスの周波数とは独立して制御される。 正のパルス及び負のパルスは、複合パルスストリームを形成するように合成され、その複合パルスストリームは、フィルタ出力が入力信号の増幅形となるようにローパスフィルタリングされる。
【選択図】 図１ |
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| 9 | SWITCHING POWER AMPLIFIER AND METHOD OF CONTROLLING THE SAME | EP09798129 | 2009-07-16 | EP2304871A4 | 2011-12-07 | PARK HAE-KWANG |
| A switching power amplifier having a pulse width modulation (PWM) signal generation unit that converts an input audio signal into a PWM signal with a predetermined carrier frequency, a correction unit that corrects the difference between an audio signal included in the PWM signal and a negative feedback output audio signal to generate a corrected PWM signal, a low pass filter that removes a high-frequency component from the corrected PWM signal, a frequency modulation unit that modulates the corrected PWM signal so that the corrected PWM signal has a switching frequency different from the carrier frequency of the input PWM signal to generate a modulated PWM signal, and a power amplification unit that amplifies a power of the modulated PWM signal. | ||||||
| 10 | SWITCHING POWER AMPLIFIER AND METHOD OF CONTROLLING THE SAME | EP09798129.4 | 2009-07-16 | EP2304871B1 | 2018-12-26 | PARK, Hae-Kwang |
| A switching power amplifier having a pulse width modulation (PWM) signal generation unit that converts an input audio signal into a PWM signal with a predetermined carrier frequency, a correction unit that corrects the difference between an audio signal included in the PWM signal and a negative feedback output audio signal to generate a corrected PWM signal, a low pass filter that removes a high-frequency component from the corrected PWM signal, a frequency modulation unit that modulates the corrected PWM signal so that the corrected PWM signal has a switching frequency different from the carrier frequency of the input PWM signal to generate a modulated PWM signal, and a power amplification unit that amplifies a power of the modulated PWM signal. | ||||||
| 11 | SWITCHING AMPLIFIER | EP07804096.1 | 2007-08-31 | EP2070193A2 | 2009-06-17 | WITCHARD, Clyde |
| A switching amplifier includes a modulator, which includes a pulse generator. The pulse generator generates positive and negative pulses, in response to an input signal, and the frequency of the negative pulses can be controlled independently of the frequency of the positive pulses. The positive pulses and negative pulses are combined to form a composite pulse stream, which can be low-pass filtered such that the filter output is an amplified version of the input signal. | ||||||
| 12 | Semiconductor integrated circuit | US15189481 | 2016-06-22 | US09960739B2 | 2018-05-01 | Takenori Kato |
| A pulse modulator receives an analog voltage VIN, and generates a pulse signal that is modulated according to the analog voltage VIN. An output stage generates a switching signal at an output terminal according to the pulse signal. A semiconductor integrated circuit is switchable between (i) a normal mode in which a main signal VMAIN to be used in a normal operating mode is input as the analog voltage VIN to the pulse modulator, and (ii) a test mode in which at least one internal analog signal VAUX generated in the semiconductor integrated circuit is input as the analog voltage VIN to the pulse modulator. | ||||||
| 13 | Supply modulators with voltage and frequency partitioning | US15224513 | 2016-07-30 | US09813088B2 | 2017-11-07 | Deukhyoun Heo; Zhiyuan Zhou; Nghia Tang |
| Techniques to improve efficiencies of power amplifiers in wireless communication devices are described herein. In one embodiment, an envelope tracking supply modulator includes a pre-amplifier having an input coupled to an envelope signal and another input coupled to a threshold voltage signal, a de-multiplexer coupled to an output of the pre-amplifier, a pulse frequency modulator having an input coupled to an output of the de-multiplexer, and a pulse width modulator having an input coupled to the output of the de-multiplexer. The de-multiplexer is configured to allow the pulse frequency modulator to modulate a switching frequency to generate a switched signal according to a slew rate of the envelope signal or allow the pulse width modulator to provide the switched signal as a current source with a constant frequency, based on a comparison result between the envelope signal and the threshold voltage signal at the pre-amplifier. | ||||||
| 14 | SUPPLY MODULATORS WITH VOLTAGE AND FREQUENCY PARTITIONING | US15224513 | 2016-07-30 | US20170033811A1 | 2017-02-02 | Deukhyoun Heo; Zhiyuan Zhou; Nghia Tang |
| Techniques to improve efficiencies of power amplifiers in wireless communication devices are described herein. In one embodiment, an envelope tracking supply modulator includes a pre-amplifier having an input coupled to an envelope signal and another input coupled to a threshold voltage signal, a de-multiplexer coupled to an output of the pre-amplifier, a pulse frequency modulator having an input coupled to an output of the de-multiplexer, and a pulse width modulator having an input coupled to the output of the de-multiplexer. The de-multiplexer is configured to allow the pulse frequency modulator to modulate a switching frequency to generate a switched signal according to a slew rate of the envelope signal or allow the pulse width modulator to provide the switched signal as a current source with a constant frequency, based on a comparison result between the envelope signal and the threshold voltage signal at the pre-amplifier. | ||||||
| 15 | SEMICONDUCTOR INTEGRATED CIRCUIT | US15189481 | 2016-06-22 | US20160373073A1 | 2016-12-22 | Takenori KATO |
| A pulse modulator receives an analog voltage VIN, and generates a pulse signal that is modulated according to the analog voltage VIN. An output stage generates a switching signal at an output terminal according to the pulse signal. A semiconductor integrated circuit is switchable between (i) a normal mode in which a main signal VMAIN to be used in a normal operating mode is input as the analog voltage VIN to the pulse modulator, and (ii) a test mode in which at least one internal analog signal VAUX Generated in the Semiconductor Integrated circuit is input as the analog voltage VIN to the pulse modulator. | ||||||
| 16 | AMPLIFICATION PHASE CORRECTION IN A PULSE BURST | US14471568 | 2014-08-28 | US20160065146A1 | 2016-03-03 | Chang Ru Zhu |
| An apparatus having an amplifier and a correction circuit is disclosed. The amplifier may be configured to amplify an intermediate signal to generate an output signal. The amplifier is generally a microwave frequency power amplifier. The correction circuit may be configured to (i) generate a control signal based on a plurality of characteristics of the amplifier, and (ii) adjust a plurality of phases of a plurality of pulses in a pulse burst to generate the intermediate signal. The adjusting may be in response to the control signal. The pulse burst is generally received in an input signal. The phases of the pulses as adjusted in the intermediate signal generally cancel a plurality of phase errors induced by the amplifier in the pulses. | ||||||
| 17 | Audio signal correction and calibration for a room environment | US13710690 | 2012-12-11 | US09036825B2 | 2015-05-19 | Fawad Nackvi |
| Disclosed are an apparatus and method of processing an audio signal to optimize audio for a room environment. One example method of operation may include recording the audio signal generated within a particular room environment and processing the audio signal to create an original frequency response based on the audio signal. The method may also include identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response, determining whether the target sub-region is a narrow energy region, creating a filter to adjust the frequency response, and applying the filter to the audio signal. | ||||||
| 18 | AUDIO SIGNAL CORRECTION AND CALIBRATION FOR A ROOM ENVIRONMENT | US13710690 | 2012-12-11 | US20140161281A1 | 2014-06-12 | Fawad Nackvi |
| Disclosed are an apparatus and method of processing an audio signal to optimize audio for a room environment. One example method of operation may include recording the audio signal generated within a particular room environment and processing the audio signal to create an original frequency response based on the audio signal. The method may also include identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response, determining whether the target sub-region is a narrow energy region, creating a filter to adjust the frequency response, and applying the filter to the audio signal. | ||||||
| 19 | Switching power amplifier and method of controlling the same | US12503978 | 2009-07-16 | US08410845B2 | 2013-04-02 | Hae-kwang Park |
| A switching power amplifier having a pulse width modulation (PWM) signal generation unit that converts an input audio signal into a PWM signal with a predetermined carrier frequency, a correction unit that corrects the difference between an audio signal included in the PWM signal and a negative feedback output audio signal to generate a corrected PWM signal, a low pass filter that removes a high-frequency component from the corrected PWM signal, a frequency modulation unit that modulates the corrected PWM signal so that the corrected PWM signal has a switching frequency different from the carrier frequency of the input PWM signal to generate a modulated PWM signal, and a power amplification unit that amplifies a power of the modulated PWM signal. | ||||||
| 20 | Digital pulse width modulation with variable period and error distribution | US11591114 | 2006-10-31 | US07764734B2 | 2010-07-27 | Samuel Chi Hong Yau |
| Digital pulse width modulation with variable period and error distribution that improves the tradeoff between resolution and clock speed in pulse width modulation circuits so that a higher resolution can be achieved with a lower clock speed. A preferred method includes, for a signal sample S and each value of P in a range Pmin to Pmax of pulse periods P, determining a pulse width V=round(P*S), where round(P*S) is the closest integer value of P*S, and the magnitude of the error |E|=|S−V/P|, for the value of V (Vopt) and P (Popt) associated with the lowest value of the magnitude of the error |E|, providing an output pulse of a pulse width Vopt during the pulse period Popt, and successively repeating a) and b). Other aspects of the invention may include error distribution, error squelching to prevent idle-tone, idle-noise artifacts, 2-samples-per-pulse and non-uniform sampling and pulsing. Other features are disclosed. | ||||||
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