| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Switching Amplifier | US12440130 | 2007-08-31 | US20100045377A1 | 2010-02-25 | Clyde Witchard |
| 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. | ||||||
| 22 | Digital pulse width modulation with variable period and error distribution | US11591114 | 2006-10-31 | US20080101453A1 | 2008-05-01 | 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. | ||||||
| 23 | PFM CONTROL CIRCUIT FOR CONVERTING VOLTAGES WITH HIGH EFFICIENCY OVER BROAD LOADING REQUIREMENTS | US10908303 | 2005-05-06 | US20060250121A1 | 2006-11-09 | Guang-Nan TZENG; Yung-Chih CHEN; Ya-Der TAIN |
| A PFM control circuit generates a pulse control signal for controlling a switching regulator to convert an input voltage into an output voltage. The pulse control signal has a plurality of switch cycles, each of which consists of an ON-time and an OFF-time. The ON-time is applied to turn on a switching circuit of the switching regulator while the OFF-time is applied to turn off the switching circuit. A current detection signal is representative of a current flowing through an inductive device of the switching regulator. The ON-time is prolonged in accordance with an increase of a maximum of the current detection signal. A voltage detection signal is representative of the output voltage. The OFF-time is prolonged in accordance with a reduction of a falling rate of the voltage detection signal. | ||||||
| 24 | Amplification phase correction in a pulse burst | US15271481 | 2016-09-21 | US10063192B2 | 2018-08-28 | 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. | ||||||
| 25 | AUDIO SIGNAL CORRECTION AND CALIBRATION FOR A ROOM ENVIRONMENT | US15641271 | 2017-07-04 | US20170311077A1 | 2017-10-26 | 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. | ||||||
| 26 | Audio signal correction and calibration for a room environment | US15201419 | 2016-07-02 | US09699557B2 | 2017-07-04 | 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. | ||||||
| 27 | Inverter/power amplifier with capacitive energy transfer and related techniques | US14401981 | 2013-03-13 | US09634577B2 | 2017-04-25 | David J. Perreault |
| Circuit topologies and control methods for a dc-to-rf converter circuit are described. | ||||||
| 28 | AUDIO SIGNAL CORRECTION AND CALIBRATION FOR A ROOM ENVIRONMENT | US15201419 | 2016-07-02 | US20160316295A1 | 2016-10-27 | 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. | ||||||
| 29 | Amplification phase correction in a pulse burst | US14471568 | 2014-08-28 | US09479122B2 | 2016-10-25 | 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. | ||||||
| 30 | AUDIO SIGNAL CORRECTION AND CALIBRATION FOR A ROOM ENVIRONMENT | US14706251 | 2015-05-07 | US20150237445A1 | 2015-08-20 | 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. | ||||||
| 31 | Inverter/Power Amplifier With Capacitive Energy Transfer and Related Techniques | US14401981 | 2013-03-13 | US20150171768A1 | 2015-06-18 | David J. Perreault |
| Circuit topologies and control methods for a dc-to-rf converter circuit are described. | ||||||
| 32 | Switching power amplifier and method of controlling the same | US13775816 | 2013-02-25 | US08922277B2 | 2014-12-30 | 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. | ||||||
| 33 | SWITCHING POWER AMPLIFIER AND METHOD OF CONTROLLING THE SAME | US13775816 | 2013-02-25 | US20130169356A1 | 2013-07-04 | 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. | ||||||
| 34 | Switching amplifier | US12440130 | 2007-08-31 | US07920023B2 | 2011-04-05 | Clyde Witchard |
| 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. | ||||||
| 35 | SWITCHING POWER AMPLIFIER AND METHOD OF CONTROLLING THE SAME | US12503978 | 2009-07-16 | US20100013554A1 | 2010-01-21 | 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. | ||||||
| 36 | PFM control circuit for DC regulator | US10908303 | 2005-05-06 | US07279869B2 | 2007-10-09 | Guang-Nan Tzeng; Yung-Chih Chen; Ya-Der Tain |
| A PFM control circuit generates a pulse control signal for controlling a switching regulator to convert an input voltage into an output voltage. The pulse control signal has a plurality of switch cycles, each of which consists of an ON-time and an OFF-time. The ON-time is applied to turn on a switching circuit of the switching regulator while the OFF-time is applied to turn off the switching circuit. A current detection signal is representative of a current flowing through an inductive device of the switching regulator. The ON-time is prolonged in accordance with an increase of a maximum of the current detection signal. A voltage detection signal is representative of the output voltage. The OFF-time is prolonged in accordance with a reduction of a falling rate of the voltage detection signal. | ||||||
| 37 | 스위칭 파워 증폭 장치 및 그 제어 방법 | KR1020090027754 | 2009-03-31 | KR1020100008749A | 2010-01-26 | 박해광 |
| PURPOSE: A switching power amplifier and a control method thereof are provided to improve a frequency characteristic of the power amplifier by modulating an input pulse width modulation signal. CONSTITUTION: A pulse width modulation signal generator(410) changes an input audio signal to a pulse width modulation signal with a preset carrier frequency. A corrector(421) outputs the corrected pulse width modulation signal by correcting the difference value between an audio signal of the pulse width modulation signal and the feedback output audio signal. A low pass filter(422) removes the high frequency element from the corrected pulse width modulation signal. A frequency modulator(423) modulates the corrected pulse width modulation signal for obtaining the switching frequency different from the preset carrier frequency. A power amplifier(430) amplifies the power of the modulated pulse width modulation signal. | ||||||
| 38 | SWITCHING AMPLIFIER | EP07804096.1 | 2007-08-31 | EP2070193B1 | 2018-12-12 | 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. | ||||||
| 39 | AMPLIFICATION PHASE CORRECTION IN A PULSE BURST | EP15756305.7 | 2015-08-18 | EP3186884B1 | 2018-07-11 | ZHU, Chang Ru |
| 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. | ||||||
| 40 | AMPLIFICATION PHASE CORRECTION IN A PULSE BURST | EP15756305.7 | 2015-08-18 | EP3186884A1 | 2017-07-05 | ZHU, Chang Ru |
| 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. | ||||||
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