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71. 发明授权

US06229393B1 High frequency power generator 失效
标题翻译：高频发电机
公开(公告)号：US06229393B1
公开(公告)日：2001-05-08
申请号：US09359834
申请日：1999-07-23
申请人： Felix Daners
发明人： Felix Daners
IPC分类号： H03F338
CPC分类号： H03G3/001
摘要： A high frequency power generator comprises a power amplifier working in switching operation, an output filter, having at least one series resonant circuit and at least one parallel resonant circuit, and a digital controller including a phase-synchronizable oscillator, wherein the frequency of the drive voltage of the power amplifier is produced upon stimulation of oscillation by the digital controller with the timing pulse of the oscillator, and the digital controller filters off feedback from the high frequency power generator in such manner that the frequency of the drive voltage of the power amplifier lies in a defined frequency range.
摘要翻译：高频功率发生器包括一个工作于开关操作的功率放大器，一个输出滤波器，具有至少一个串联谐振电路和至少一个并联谐振电路，以及包括相位可同步振荡器的数字控制器，其中驱动电压的频率功率放大器是在数字控制器利用振荡器的定时脉冲刺激振荡时产生的，并且数字控制器以这样的方式滤除来自高频发生器的反馈，使得功率放大器的驱动电压的频率位于定义的频率范围。

72. 发明授权

US06188276B1 Power amplifier 失效
标题翻译：功率放大器
公开(公告)号：US06188276B1
公开(公告)日：2001-02-13
申请号：US09335997
申请日：1999-06-18
申请人： Anastasios V. Simopoulos
发明人： Anastasios V. Simopoulos
IPC分类号： H03F338
CPC分类号： H03F3/2171 , H02M3/33576
摘要： The invention is a linear converter that operates from a single, unregulated power supply to provide voltage gain and power amplification. The circuit comprises two pulse-width modulators, two switches, and an inductive element, all of which cooperate to maintain an output voltage in fixed proportion to an input signal. According to the invention, an error signal is generated in a resistive divider formed between the input voltage and the output voltage. Excursions of this error signal from two fixed voltage references are used by the pulse-width modulators to generate two pulse-width modulated signals. One pulse-width modulated signal is generated when the error signal is below one voltage reference, and it drives a switch to inductively increase the output voltage. The other pulse-width modulated signal is generated when the error signal is above another voltage reference, and it drives another switch to inductively decrease the output voltage. By continuously feeding back the output voltage to the pulse-width modulators in this manner, a linear power amplifier is realized.
摘要翻译：本发明是线性转换器，其从单个未调节的电源操作以提供电压增益和功率放大。该电路包括两个脉冲宽度调制器，两个开关和一个电感元件，所有这些都协同维持与输入信号固定比例的输出电压。根据本发明，在输入电压和输出电压之间形成的电阻分压器中产生误差信号。来自两个固定电压基准的误差信号的偏移由脉冲宽度调制器用于产生两个脉冲宽度调制信号。当误差信号低于一个参考电压时产生一个脉冲宽度调制信号，并驱动开关以感应地增加输出电压。当误差信号高于另一个参考电压时产生另一个脉冲宽度调制信号，并驱动另一个开关以感应地降低输出电压。通过以这种方式连续地将输出电压反馈到脉宽调制器，实现了线性功率放大器。

73. 发明授权

US06172558B2 Switching amplifier and method for operating same 有权
标题翻译：开关放大器及其操作方法
公开(公告)号：US06172558B2
公开(公告)日：2001-01-09
申请号：US09388602
申请日：1999-09-02
申请人： Stefan Nowak , Robert Bleisteiner
发明人： Stefan Nowak , Robert Bleisteiner
IPC分类号： H03F338
CPC分类号： G01R33/3852 , H03F3/2178
摘要： A switching amplifier operable in a switched mode has a common-mode charging current which arises due to charge reversals in the conductor to ground and coupling capacitances. In order to make this charging current easily filterable, in a switching amplifier and a method for operating a switching amplifier, n successively connected cascade elements are provided n being odd and greater than equal to three, and a control unit drives comparable switch elements in the individual cascade elements so that these comparable switch elements are driven offset from cascade element-to-cascade element by 1/n times the switching period.
摘要翻译：以开关模式工作的开关放大器具有共模充电电流，这是由于导体对地的电荷反转和耦合电容而产生的。为了使该充电电流易于滤波，在开关放大器和用于操作开关放大器的方法中，提供n个连续连接的级联元件，n为奇数，大于等于3，并且控制单元驱动相应的开关元件单独的级联元件，使得这些可比较的开关元件被驱动从级联元件到级联元件偏移1 / n倍的开关周期。

74. 发明授权

US06816007B1 Amplifier with dynamic rail control drive circuit 失效
标题翻译：放大器带动态轨控驱动电路
公开(公告)号：US06816007B1
公开(公告)日：2004-11-09
申请号：US10209441
申请日：2002-07-29
申请人： Joseph Y. Sahyoun
发明人： Joseph Y. Sahyoun
IPC分类号： H03F338
CPC分类号： H03F3/211 , H03F1/0227 , H03F3/217
摘要： The amplifier of the present invention causes variations in the rail voltage that are controlled by the frequency of the audio signal being amplified as the audio signal changes. This is done to tune the operation of the amplifier taking into consideration the frequency response of the human ear. By doing so, the resulting amplifier is more efficient at lower frequencies where more signal distortion is required before it can be heard by the human ear, and a higher quality signal output is provided at higher frequencies where the human ear can more readily detect distortion. Thus by designing the amplifier from the listener's point of view results in an amplifier with much improved performance from both technical and listener points of view.
摘要翻译：本发明的放大器导致轨道电压的变化，由音频信号的频率随着音频信号的变化被放大而被控制。这是为了调整放大器的操作，考虑到人耳的频率响应。通过这样做，所得到的放大器在其可以被人耳听到之前需要更多信号失真的较低频率下更有效，并且在更高频率处提供更高质量的信号输出，其中人耳可以更容易地检测失真。因此，通过从听众的角度设计放大器，可以从技术和监听者的观点得出具有大大提高的性能的放大器。

75. 发明授权

US06794931B2 Switched amplifier 失效
标题翻译：开关放大器
公开(公告)号：US06794931B2
公开(公告)日：2004-09-21
申请号：US10204996
申请日：2002-10-21
申请人： Peter Kenington
发明人： Peter Kenington
IPC分类号： H03F338
CPC分类号： H03F1/0261 , H03F1/0227 , H03F1/0266 , H03F1/0277 , H03F1/3241 , H03F1/3282 , H03F3/217
摘要： An imput signal is provided in polar format comprising an amplitude component (210) and a phase component (212). The amplitude component (210) is supplied to a pulse width modulator (219) which derives pulse width modulated (PWM) signal. The PWM signal is used to control a switch (224) which modulates the phase component (212). The modulated phase component (212) is amplified at (216). The output of amplifier (216) has a desired envelope, as dictated by the PWM signal, whose characteristics are, in turn, derived from the amplitude component (210). Either or both of the amplitude component (210) and the phase component (212) can be predistorted (226, 218).
摘要翻译：输入信号以极化格式提供，包括振幅分量（210）和相位分量（212）。幅度分量（210）被提供给导出脉宽调制（PWM）信号的脉冲宽度调制器（219）。 PWM信号用于控制调制相位分量（212）的开关（224）。调制相位分量（212）在（216）处被放大。放大器（216）的输出具有由PWM信号所规定的期望的包络，其特征又从幅度分量（210）导出。振幅分量（210）和相位分量（212）中的任一个或两者可以被预失真（226,218）。

76. 发明授权

US06781453B2 Method of detecting load impedance for inductive boost amplifier 有权
标题翻译：感应式升压放大器的负载阻抗检测方法
公开(公告)号：US06781453B2
公开(公告)日：2004-08-24
申请号：US10128047
申请日：2002-04-23
申请人： Larry Kirn
发明人： Larry Kirn
IPC分类号： H03F338
CPC分类号： H03F3/2171 , H03F3/2173
摘要： A method of enhancing the performance of an inductive boost amplifier includes the steps of detecting the specific load impedance being drive by the amplifier, and adjusting the operation of the amplifier to accommodate the detected load impedance. Various load impedances may be connected to the improved amplifier while accommodating the impedance of different amplifier loads subject to change under various conditions such as temperature, voltage, frequency, etc. Thus, in addition to compensation of static load impedance variances, the present invention is quite effective in compensating for dynamic variances as well. Although the description focuses on variable load impedance compensation, it is anticipated that simpler implementations of the technique may be used to selectively switch output filter components into operation in response to specific load impedance ranges, yielding a similar, albeit coarser, net result. The invention may be used as well to regulate other amplifier functions, such as back-EMF shunt timing, and other circuits.
摘要翻译：提高感应式升压放大器的性能的方法包括以下步骤：检测被放大器驱动的比负载阻抗，以及调整放大器的操作以适应检测到的负载阻抗。各种负载阻抗可以连接到改进的放大器，同时容纳在诸如温度，电压，频率等的各种条件下变化的不同放大器负载的阻抗。因此，除了静态负载阻抗方差的补偿之外，本发明是相当有效地补偿动态方差。虽然该描述集中于可变负载阻抗补偿，但是可以预期该技术的更简单的实现可以用于响应于特定的负载阻抗范围选择性地将输出滤波器组件切换到操作中，产生类似的，尽管较粗的净结果。也可以使用本发明来调节诸如反电动势分流定时和其它电路的其它放大器功能。

77. 发明授权

US06771121B2 Linearization of a PDM Class-D amplifier 有权
标题翻译： PDM D类放大器的线性化
公开(公告)号：US06771121B2
公开(公告)日：2004-08-03
申请号：US10336967
申请日：2003-01-06
申请人： Johan Nilsson , Lars Lennartsson , Horst Knoedgen
发明人： Johan Nilsson , Lars Lennartsson , Horst Knoedgen
IPC分类号： H03F338
CPC分类号： H03F3/2173 , H03F2200/331
摘要： A method to linearize the characteristic of a Class-D amplifier is achieved, by compensating for the pulse-area-error, caused by a non-constant power-supply and similar circuit inconsistencies. A Class-D Amplifier typically converts the PDM (Pulse Density Modulated) input signal with a Sigma Delta Modulator and typically uses an H-Bridge as the Class-D power output stage. A fundamental idea is to keep the time-voltage area of every pulse constant. To achieve this, the circuit integrates the power supply voltage, starting with the PDM input pulse and stopping, when the defined time-voltage reference is reached. To compensate not only for power supply variations, but also for e.g. the voltage drop across the output devices, the integrator's input would be more directly reference to the actual voltage across the output load.
摘要翻译：通过补偿由非恒定电源和类似电路不一致引起的脉冲面积误差，实现了对D类放大器的特性进行线性化的方法。 D类放大器通常用Sigma Delta调制器转换PDM（脉冲密度调制）输入信号，通常使用H桥作为D类功率输出级。一个基本思想是保持每个脉冲的时间 - 电压面积不变。为达到此目的，当达到规定的时间电压基准时，电路将电源电压从PDM输入脉冲开始并停止。为了补偿电源变化，而且还用于例如电源。输出器件上的电压降，积分器的输入将更直接地参考输出负载上的实际电压。

78. 发明授权

US06768376B2 Dual mode class D amplifiers 失效
标题翻译：双模D类放大器
公开(公告)号：US06768376B2
公开(公告)日：2004-07-27
申请号：US10430756
申请日：2003-05-06
申请人： David Hoyt , Stuart W. Pullen , Patrick A. Begley , Arecio A. Hernandez , Jeffrey M. Strang
发明人： David Hoyt , Stuart W. Pullen , Patrick A. Begley , Arecio A. Hernandez , Jeffrey M. Strang
IPC分类号： H03F338
CPC分类号： H04B15/04 , H03F1/0261 , H03F3/2171
摘要： Pulse width modulated (“Class D”) amplifiers and controllers switching in the 50 khz to 2 MHz range generate harmonics that interfere with AM radio reception. This interference has precluded wide spread acceptance of class D amplifiers in products that include an AM radio. The amplifier described here uses a a harmonic avoidance modulator when operating with an AM radio to avoid generating harmonics at the receiver selected frequency or the intermediate (IF) frequency thereof.
摘要翻译：脉冲宽度调制（“D类”）放大器和50 khz至2 MHz范围内的控制器可以产生干扰AM无线电接收的谐波。这种干扰阻碍了D类放大器在包括AM无线电的产品中的广泛接受。这里描述的放大器在使用AM无线电操作时使用谐波避免调制器，以避免在接收机选择的频率或其中间（IF）频率处产生谐波。

79. 发明授权

US06759899B2 Class-D amplifier with digital feedback 有权
公开(公告)号：US06759899B2
公开(公告)日：2004-07-06
申请号：US10277502
申请日：2002-10-22
申请人： Lars Lennartson , Johan Nilsson , Horst Knoedgen
发明人： Lars Lennartson , Johan Nilsson , Horst Knoedgen
IPC分类号： H03F338
CPC分类号： H03F3/2175 , H03F2200/331 , H03M3/322 , H03M3/458
摘要： A method for compensating for the pulse area error of a Class-D power amplifier is achieved; especially it compensates the variations in the supply voltage and similar dependencies. A Class-D Amplifier typically gets pulse coded digital input (PCM) and may comprise a Sigma Delta Modulator to generate the signals driving the power output stage, typically an H-Bridge. A fundamental idea of this invention is to measure the real area of the output pulses, where the area is defined as the pulse duration multiplied by the pulse voltage amplitude, and to compare it with the ideal nominal pulse area. The pulse area error is calculated and then subtracted from said amplifier's input data. Key element of this invention is the “Pulse Area Compensation Function”, which calculates said real pulse area (voltage amplitude multiplied by time), compares said real pulse area with said ideal pulse area and feeds the difference into the input of said Sigma Delta Modulator.

80. 发明授权

US06731162B2 Multi-channel digital amplifier for shifting phases of PWM signals 失效
标题翻译：用于移位PWM信号相位的多通道数字放大器
公开(公告)号：US06731162B2
公开(公告)日：2004-05-04
申请号：US10161327
申请日：2002-06-03
申请人： Choi Yeongha , Park Kyoungsoo , Sung Koeng-Mo
发明人： Choi Yeongha , Park Kyoungsoo , Sung Koeng-Mo
IPC分类号： H03F338
CPC分类号： H03F3/2171
摘要： Disclosed herewith is a multi-channel digital amplifier. The multi-channel digital amplifier includes a PWM converter, switching circuits, and low pass filters. The PWM converter converts an input signal to N low power PWM signals (N is two or more). The switching circuits amplifies the N low power PWM signals to generate N high power PWM signals. The low pass filters convert the N high power PWM signals to analog signals inputted to a plurality of speakers. The phases of the N low power PWM signals are made to be different from each other to make the on/off times of the semiconductor switching elements of the switching circuit to be different.
摘要翻译：这里公开了一种多通道数字放大器。多通道数字放大器包括PWM转换器，开关电路和低通滤波器。 PWM转换器将输入信号转换为N个低功率PWM信号（N为两个或更多）。开关电路放大N个低功率PWM信号以产生N个高功率PWM信号。低通滤波器将N个高功率PWM信号转换成输入到多个扬声器的模拟信号。使N个低功率PWM信号的相位彼此不同，以使开关电路的半导体开关元件的导通/截止时间不同。

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