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公开(公告)号：US07091771B2
公开(公告)日：2006-08-15
申请号：US10687416
申请日：2003-10-16
IPC分类号： H03F1/02
摘要： A chopping amplifier and method for chopping an input signal are disclosed. The chopping amplifier and method utilize at least two chopping amplifier stages. A chopping operation of an input signal is segmented across two or more chopping amplifier stages, and the two or more chopping amplifier stages are responsive to a master controller. Chop clock signals of the chopping amplifier stages are staggered so that they have non-overlapping periods and at least one of the chopping amplifier stages is not operating in an open loop at any given time. The non-overlapping periods are periodic so that a master chop clock of the master controller can be operated at a lower chop clock frequency. For every doubling of N number of chopping amplifier stages, magnitudes of chopping artifacts and aliased components are each respectively reduced by 3 dB.
摘要翻译： 公开了一种用于斩波输入信号的斩波放大器和方法。 斩波放大器和方法利用至少两个斩波放大器级。 输入信号的斩波操作跨越两个或更多个斩波放大器级分段，并且两个或更多个斩波放大器级对主控制器做出响应。 斩波放大器级的斩波时钟信号交错，使得它们具有非重叠周期，并且至少一个斩波放大器级在任何给定时间都不在开环中工作。 非重叠周期是周期性的，使得主控制器的主斩波时钟可以以较低的斩波时钟频率工作。 对于N个斩波放大器级的每一倍，斩波伪影和混叠分量的大小分别降低3dB。
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公开(公告)号：US07009543B2
公开(公告)日：2006-03-07
申请号：US10994617
申请日：2004-11-22
申请人： John L. Melanson
发明人： John L. Melanson
IPC分类号： H03M3/00
CPC分类号： H03M7/3013 , H03M7/3011 , H03M7/3028 , H03M7/304
摘要： A signal processing system having a multiple non-monotonic regions quantization transfer function can improve overall delta sigma modulator performance. The non-monotonic quantization transfer function includes multiple quantization level retrograde changeover thresholds. Thus, the quantizer makes retrograde quantization level decisions for predetermined signal levels in multiple non-monotonic regions, i.e., for the ith non-monotonic quantization region 1≦i≦N, N≧2, and quantizer transfer function Q(s), Q(s1i)≦Q(s2i) for a first set of quantizer input signals |s1i|>|s2i| and Q(s3i)≦Q(s4i), for a second set of quantizer input signals |s3i|>|s4i|. The retrograde quantization level decisions for multiple non-monotonic regions, i.e. Q(s3i)≦Q(s4i), for |s3i|>|s4i|, effectively provide positive feedback to the delta sigma modulator input signal for each of the N non-monotonic regions and result in a more carefully defined gain for the delta sigma modulator.
摘要翻译： 具有多个非单调区域量化传递函数的信号处理系统可以提高总体ΔΣ调制器性能。 非单调量化传递函数包括多个量化级逆向转换阈值。 因此，量化器对于多个非单调区域中的预定信号电平进行逆向量化级别决定，即对于第i个非单调量化区域1，i = N，N 2 = 2 ，以及用于第一组量化器输入信号| s 1的量化器传递函数Q（s），Q（s 1）i = Q（S 2＆CenterDot; SUB> i |> | s 2 对于第二组量化器输入信号| s 3 | i | Q |（Q），则Q（s 3）i = Q（S 4＆lt; i＆gt; > | s 4 对于多个非单调区域的逆向量化级别决策，即对于| s 3 i的Q（s 3 i） 对于N个非单调区域中的每一个，有效地向ΔΣ调制器输入信号提供正反馈，并且导致三角形的更仔细限定的增益 Σ调制器。
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53.发明授权公开(公告)号：US06861968B2
公开(公告)日：2005-03-01
申请号：US10668397
申请日：2003-09-23
CPC分类号： H03M7/3006 , H03M3/344 , H03M3/50 , H03M7/3026
摘要： A digital-to-analog converter (“DAC”) system utilizes notch filters and chopping modulation technology to remove l/f and other baseband noise from a baseband of a signal of interest. Chopping modulation and demodulation circuitry of the DAC operate at a chopping frequency and all harmonics equal to approximately one-half of a digital input signal sampling frequency. A notch filter attenuates signals having frequencies around the chopping frequency prior to chopping to reduce fold back of noise into the baseband due to parasitic modulation. Another notch filter attenuating signals having frequencies around twice the chopping frequency further reduces fold back of noise into the baseband.
摘要翻译： 数模转换器（“DAC”）系统利用陷波滤波器和斩波调制技术从感兴趣信号的基带去除l / f和其他基带噪声。 DAC的斩波调制和解调电路工作在斩波频率，所有谐波等于数字输入信号采样频率的大约一半。 陷波滤波器在斩波之前衰减具有围绕斩波频率的频率的信号，以减少由于寄生调制而将噪声折回到基带。 衰减具有大约斩波频率两倍的频率的信号的另一个陷波滤波器进一步降低了噪声向基带的折回。
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54.发明授权Modulation of a digital input signal using a digital signal modulator and signal splitting 有权使用数字信号调制器和信号分离调制数字输入信号公开(公告)号：US06693571B2
公开(公告)日：2004-02-17
申请号：US10325145
申请日：2002-12-20
IPC分类号： H03M300
CPC分类号： H02M3/1584 , H02M3/157 , H03F3/2173 , H03F2200/331 , H03K7/08
摘要： A digital signal modulator modulates a digital input signal to drive a load, such as an opposed current amplifier or other opposed current converter. The combinations of frequency relationships and digital signal modulator elements provide significant digital signal processing capabilities and flexible output signal timing. In one embodiment, a digital signal modulator modulates a digital input signal. Even and odd samples of the input signal propagate along two respective channels (signal paths), which include further digital processing capabilities, such as pulse width modulation, to generate output signals appropriate for the topology of a load. Additionally, a bias signal may be modulated with the digital input signal. By utilizing digital signal processing to modulate the input signal, various processing technologies are applied to the input signal. For example, noise shaping may be implemented using a delta-sigma modulator as an input stage to the two channels.
摘要翻译： 数字信号调制器调制数字输入信号以驱动负载，例如相对的电流放大器或其它相对的电流转换器。 频率关系和数字信号调制器元件的组合提供了显着的数字信号处理能力和灵活的输出信号时序。 在一个实施例中，数字信号调制器调制数字输入信号。 输入信号的偶数和奇数样本沿着两个相应的通道（信号路径）传播，其包括进一步的数字处理能力，例如脉冲宽度调制，以产生适合负载拓扑的输出信号。 另外，可以用数字输入信号调制偏置信号。 通过利用数字信号处理来调制输入信号，各种处理技术被应用于输入信号。 例如，可以使用Δ-Σ调制器作为两个通道的输入级来实现噪声整形。
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公开(公告)号：US5406634A
公开(公告)日：1995-04-11
申请号：US33697
申请日：1993-03-16
IPC分类号： H04R27/00
CPC分类号： H04R27/00 , H04R2227/003
摘要： An intelligent speaker unit is controlled by control data transmitted with the digital audio data. The intelligent speaker has a Digital Signal Processor (DSP) for processing the audio data in accordance with the control data. The control data contains an address to select the speaker unit. The DSP for the speaker unit processes audio data digitally based on parameters in the control data. The processed digital audio data is then converted to an analog signal which is amplified and applied to the speaker. The digital audio data is time division multiplexed on a TDM bus. Each time slot on the TDM bus contains audio data for one digital audio channel. The control data is placed on the TDM bus as one channel (time slot) or is distributed as control bits through all the other channels. The control data also contains channel select data. Accordingly the DSP in a selected speaker unit may in turn select its audio data from a plurality of audio channels based on the control data the DSP receives. Further, the DSP may mix the selected audio channels by accumulating the audio data from the selected channels. Further, the control data contains audio control data for volume, speaker equalization and sound delay.
摘要翻译： 智能扬声器单元由与数字音频数据一起发送的控制数据控制。 智能扬声器具有用于根据控制数据处理音频数据的数字信号处理器（DSP）。 控制数据包含选择扬声器单元的地址。 用于扬声器单元的DSP基于控制数据中的参数以数字方式处理音频数据。 然后将经处理的数字音频数据转换成放大并应用于扬声器的模拟信号。 数字音频数据在TDM总线上进行时分复用。 TDM总线上的每个时隙都包含一个数字音频通道的音频数据。 控制数据作为一个通道（时隙）放置在TDM总线上，或者通过所有其他通道作为控制位分配。 控制数据还包含通道选择数据。 因此，所选择的扬声器单元中的DSP可以依据DSP接收的控制数据从多个音频通道中选择其音频数据。 此外，DSP可以通过累积来自所选频道的音频数据来混合所选择的音频频道。 此外，控制数据包含用于音量，扬声器均衡和声音延迟的音频控制数据。
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56.发明授权Thermal management in a lighting system using multiple, controlled power dissipation circuits 有权使用多个受控功耗电路的照明系统中的热管理公开(公告)号：US09497851B2
公开(公告)日：2016-11-15
申请号：US13290003
申请日：2011-11-04
申请人： John L. Melanson , Eric J. King
发明人： John L. Melanson , Eric J. King
CPC分类号： H05K1/0203 , H05B33/08 , H05B33/0809 , H05B33/0812 , H05B33/0815 , H05B33/0818 , H05B33/0824 , H05B33/0827 , H05B33/0845 , H05B33/0851 , H05B33/0854 , H05B37/02 , Y02B20/19 , Y02B20/346 , Y02B20/347
摘要： A lighting system includes a controller that is configured to provide thermal management for the lighting system by distributing excess energy in the lighting system through multiple power dissipation circuits. In at least one embodiment, the lighting system is a phase cut compatible, dimmable lighting system having one or more light sources selected from a group consisting of at least one light emitting diode and at least one compact fluorescent lamp. In at least one embodiment, the controller is configured to control the plurality of power dissipation circuits in accordance with a thermal management strategy to dissipate the excess energy in the phase cut compatible, dimmable lighting system. The particular thermal management strategy is a matter of design choice. The power distribution circuits include two of more of: a controlled switch path power dissipation circuit, a controlled link path power dissipation circuit, and a controlled flyback path power dissipation circuit.
摘要翻译： 照明系统包括控制器，其被配置为通过多个功率消耗电路在照明系统中分配多余的能量来为照明系统提供热管理。 在至少一个实施例中，照明系统是具有从由至少一个发光二极管和至少一个紧凑型荧光灯组成的组中选择的一个或多个光源的相切兼容的可调光照明系统。 在至少一个实施例中，控制器被配置为根据热管理策略来控制多个功率消耗电路，以耗散相切兼容的可调光照明系统中的多余能量。 特定的热管理策略是设计选择的问题。 功率分配电路包括以下两个中的一个：受控开关路径功耗电路，受控链路路径功耗电路和受控反激路径功耗电路。
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57.发明授权Cascaded switching power converter for coupling a photovoltaic energy source to power mains 有权用于将光伏能源耦合到电源的级联开关电源转换器公开(公告)号：US09077262B2
公开(公告)日：2015-07-07
申请号：US12933990
申请日：2009-04-28
申请人： John L. Melanson
发明人： John L. Melanson
CPC分类号： H02M7/53832 , H02J3/383 , H02M1/14 , H02M7/4807 , Y02E10/563
摘要： A cascaded switching power converter for coupling a photovoltaic (PV) energy source to power mains provides a high-efficiency and a potentially simple control mechanism for AC solar energy conversion systems. The PV energy source charges a capacitive storage element through a DC-DC converter, and an inverter couples energy from the capacitive storage element to the mains supply. The DC-DC converter is controlled so that ripple present on the capacitive storage element due to current drawn by the inverter is not reflected at the input of the DC-DC converter, which is accomplished by varying the conversion ratio of the DC-DC converter with the ripple voltage present across the capacitor. The average voltage of the capacitor can also be increased with increases in the available power output from the PV energy source, so that a corresponding increase in power is transferred to the mains supply.
摘要翻译： 用于将光伏（PV）能量源耦合到电源的级联开关功率转换器为AC太阳能转换系统提供了高效率和潜在的简单的控制机制。 PV能源通过DC-DC转换器为电容性存储元件充电，并且逆变器将能量从电容存储元件耦合到电源。 控制DC-DC转换器，使得由于逆变器引起的电流而在电容性存储元件上产生的纹波不会反映在DC-DC转换器的输入端，这是通过改变DC-DC转换器的转换比 纹波电压存在于电容器两端。 电容器的平均电压也可以随着来自PV能源的可用功率输出的增加而增加，从而相应的功率增加被传送到电源。
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58.发明授权Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC) 有权具有自适应噪声消除（ANC）的个人音频设备中的限幅抗噪声公开(公告)号：US08948407B2
公开(公告)日：2015-02-03
申请号：US13333484
申请日：2011-12-21
申请人： Jeffrey Alderson , Nitin Kwatra , Gautham Devendra Kamath , Ali Abdollahzadeh Milani , John L. Melanson
发明人： Jeffrey Alderson , Nitin Kwatra , Gautham Devendra Kamath , Ali Abdollahzadeh Milani , John L. Melanson
IPC分类号： A61F11/06 , G10K11/178
CPC分类号： G10K11/178 , G10K2210/108 , G10K2210/1081 , G10K2210/1082 , G10K2210/3017 , G10K2210/3028 , G10K2210/3035 , G10K2210/3049 , G10K2210/3056 , G10K2210/511
摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit that performs the adaptive noise canceling (ANC) function also either adjusts the frequency response of the anti-noise signal with respect to the reference microphone signal, and/or by adjusting the response of the adaptive filter independent of the adaptation provided by the reference microphone signal.
摘要翻译： 诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其它换能器输出中以引起环境音频声音的消除。 还可以在扬声器附近提供误差麦克风以测量换能器的输出，以便控制抗噪声信号的适应性并且估计通过换能器的噪声消除电路的电声路径。 执行自适应噪声消除（ANC）功能的处理电路还可以相对于参考麦克风信号调整抗噪声信号的频率响应，和/或通过调节独立于由 参考麦克风信号。
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59.发明授权Transformer-isolated LED lighting circuit with secondary-side dimming control 有权变压器隔离型LED照明电路采用二次侧调光控制公开(公告)号：US08947016B2
公开(公告)日：2015-02-03
申请号：US13537301
申请日：2012-06-29
申请人： John L. Melanson , Eric King
发明人： John L. Melanson , Eric King
CPC分类号： H05B33/0815 , H05B33/0845 , Y02B20/345 , Y02B20/347
摘要： A transformer isolated LED lighting circuit supplies current from a secondary-side storage capacitor to one or more LED strings in conformity with one or more dimming values. The dimming values are communicated through the transformer by patterns or codes provided in pulses of a power converter circuit that charges the storage capacitor from the primary side of the transformer, or alternatively by a special modulated signal provided in addition to the switching pulses.
摘要翻译： 变压器隔离的LED照明电路将电流从次级侧存储电容器提供给一个或多个符合一个或多个调光值的LED串。 调光值通过变压器通过在从变压器的初级侧对存储电容器充电的功率转换器电路的脉冲中提供的模式或代码，或者通过除开关脉冲之外提供的特殊调制信号来传送。
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公开(公告)号：US08587217B2
公开(公告)日：2013-11-19
申请号：US12675035
申请日：2008-08-23
申请人： John L. Melanson
发明人： John L. Melanson
CPC分类号： H05B33/083 , H05B33/0815 , Y02B20/347
摘要： A LED driver and controller system utilizes switches to parallel connect to respective sets of one or more LEDs and a current source to provide efficient control of the LEDs. In at least one embodiment, the LEDs are connected in series. An LED controller of the LED driver and controller system 200 controls conductivity of the switches. In at least one embodiment, the LED controller provides control signals to one or more LED drivers. The LED drivers receive the control signals and, in response to the control signals, control the conductivity of each switch. In at least one embodiment, the conductivity of the each switch is controlled using a duty cycle modulated control signal. In at least one embodiment, the duty cycle modulated control signal is a pulse width modulated control signal. In another embodiment, the duty cycle modulated control signal is a pulse density modulated control signal.
摘要翻译： LED驱动器和控制器系统利用开关并联连接到相应的一组一个或多个LED和电流源，以提供LED的有效控制。 在至少一个实施例中，LED串联连接。 LED驱动器和控制器系统200的LED控制器控制开关的导电性。 在至少一个实施例中，LED控制器向一个或多个LED驱动器提供控制信号。 LED驱动器接收控制信号，响应于控制信号，控制每个开关的电导率。 在至少一个实施例中，使用占空比调制控制信号来控制每个开关的电导率。 在至少一个实施例中，占空比调制控制信号是脉宽调制控制信号。 在另一个实施例中，占空比调制控制信号是脉冲密度调制控制信号。
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