公开(公告)号：US07558334B2

公开(公告)日：2009-07-07

申请号：US11515250

申请日：2006-09-01

申请人： Earl W. McCune ,  Bojan Silic

发明人： Earl W. McCune ,  Bojan Silic

IPC分类号： H04K1/02

CPC分类号： H04L27/20 ,  H03C5/00

摘要： A hybrid modulator apparatus includes a modulator that amplitude modulates a power supply signal. A correction circuit coupled in parallel with the modulator reduces errors caused by the modulator. In one embodiment the modulator includes a digital pulse-width modulator (PWM) and a buck converter. The K most significant bits (MSBs) of N-bit input digital words are used by the digital PWM and a buck converter to generate an amplitude modulated power supply signal having a plurality of quantized voltage levels. The remaining N−K bits of each N-bit words may be used to dither the input drive to the PMW, to produce an error signal at the output of the modulator representing quantization errors caused by only applying the K MSBs to the PWM. The correction circuit compares the error signal to a signal formed form all N bits of the N-bit words in reducing the quantization errors.

摘要翻译： 一种混合调制装置，包括调制电源信号的调制器。 与调制器并联耦合的校正电路减少了由调制器引起的误差。 在一个实施例中，调制器包括数字脉宽调制器（PWM）和降压转换器。 数字PWM和降压转换器使用N位输入数字字的K个最高有效位（MSB）来产生具有多个量化电压电平的幅度调制电源信号。 每个N位字的剩余N-K位可以用于将输入驱动器抖动到PMW，从而在调制器的输出处产生一个误差信号，表示由仅将K个MSB施加到PWM引起的量化误差。 校正电路将误差信号与减少量化误差的N位字的全部N位形成的信号进行比较。

公开(公告)号：US20080074207A1

公开(公告)日：2008-03-27

申请号：US11515250

申请日：2006-09-01

申请人： Earl. W. McCune ,  Bojan Silic

发明人： Earl. W. McCune ,  Bojan Silic

IPC分类号： H03K7/08

CPC分类号： H04L27/20 ,  H03C5/00

摘要： A highly-efficient hybrid class-S modulator circuit for a polar modulator includes a class-S path having a digital pulse-width modulator (PWM) generator, which receives the K most significant bits (MSBs) of N-bit digital input words to generate a discrete set of PWM signals. The discrete set of PWM signals drives a buck converter, to provide a modulated power supply voltage signal having a plurality of quantized voltage levels. An error generated by using only K of the N bits of each N-bit word is reduced by dithering the input drive and converting the error to an AC signal. Dithering is performed by feeding the N−K least significant bits (LSBs) of each N-bit input word to an input of a digital oscillator, while feeding the K most significant bits (MSBs) of each word to the PWM generator. The digital oscillator converts the N−K LSBs of each input word into an oscillating single LSB. An oscillating error signal appearing at the output of the modulator is fed to the inverting input of an op-amp connected in parallel with the class-S path. At the same time, the desired output voltage, which is represented by the full N bits of the N-bit input words, is coupled to the non-inverting input of the op-amp. The op-amp responds to the input signals by sourcing or sinking current into or out of the modulator output terminal, thereby removing the error attributable to using only K of the N bits at the PWM generator.

摘要翻译： 用于极性调制器的高效混合类S调制器电路包括具有数字脉宽调制器（PWM）发生器的S类路径，其将N位数字输入字的K个最高有效位（MSB）接收到 生成一组离散的PWM信号。 离散的PWM信号组驱动降压转换器，以提供具有多个量化电压电平的调制电源电压信号。 仅使用每个N位字的N位的K来产生的错误通过使输入驱动器抖动并将该错误转换为AC信号来减少。 通过将每个N位输入字的N-K个最低有效位（LSB）馈送到数字振荡器的输入，同时将每个字的K个最高有效位（MSB）馈送到PWM发生器来执行抖动。 数字振荡器将每个输入字的N-K个LSB转换为一个振荡单个LSB。 出现在调制器输出端的振荡误差信号被馈送到与S类路径并行连接的运算放大器的反相输入端。 同时，由N位输入字的全N位表示的期望输出电压耦合到运算放大器的非反相输入端。 运算放大器通过将电流源或流入调制器输出端来响应输入信号，从而消除归因于在PWM发生器处仅使用N位的K的误差。

公开(公告)号：US20050104747A1

公开(公告)日：2005-05-19

申请号：US10942580

申请日：2004-09-16

申请人： Bojan Silic ,  Timm Peddie

发明人： Bojan Silic ,  Timm Peddie

IPC分类号： E01F9/06 ,  G08G1/005 ,  G08G1/095 ,  G08G1/0962

CPC分类号： G08G1/0962 ,  G08G1/005 ,  G08G1/095

摘要： A system, apparatus and methods are described that wirelessly communicate with its environment in response to stimuli generated locally within a communication device or within a remote activation device.

摘要翻译： 描述了系统，装置和方法，其响应于在通信设备内或在远程激活设备内本地生成的刺激与其环境无线地通信。

公开(公告)号：US06867574B2

公开(公告)日：2005-03-15

申请号：US09992049

申请日：2001-11-21

申请人： Bojan Silic

发明人： Bojan Silic

IPC分类号： H02M1/08 ,  H02M3/155 ,  H03F1/02 ,  H03K17/0412 ,  H03K17/687 ,  H03K19/0185 ,  G05F1/40

CPC分类号： H03K17/04123 ,  H02M3/155 ,  H03F1/0227

摘要： The present invention, generally speaking, provides a power-efficient method of driving a switch mode power supply at higher frequencies than those typically attainable in the prior art. In an exemplary embodiment, driver transistors exhibit gate capacitance, which is exploited by charging the gate capacitance using a pulse signal and thereafter allowing the gate capacitance to discharge. With the gate capacitance charged, the driver transistor remains on for the desired period of time even without a drive signal being continuously applied, thus conserving power. In essence, the gate capacitance is exploited in the manner of a memory cell. Furthermore, at higher-frequency operation, instead of the gate capacitance being fully charged, leading to increased turn-off time, the gate capacitance is only partially charged, allowing for quicker turn around. The envelope-following capability of the switch mode power supply, in telecommunications applications, is therefore increased. In accordance with another aspect of the invention, in RF amplification circuit having a phase path and a magnitude path, an amplifier is provided having at least a final stage, the amplifier having an RF input coupled to the phase path; and a switch mode power supply is coupled to an operational voltage and to a power supply input terminal of the amplifier. The switch mode power supply includes a transistor switch, a driver circuit for driving the transistor switch, and a controller, the controller causing the driver circuit to operate in charge transfer mode in which a pulse of short duration relative to a duty cycle of the switch mode power supply is used to turn on the transistor switch.

摘要翻译： 一般来说，本发明提供了一种以比现有技术中通常可获得的频率更高的频率驱动开关模式电源的功率有效的方法。 在示例性实施例中，驱动器晶体管表现出栅极电容，其通过使用脉冲信号对栅极电容进行充电而被利用，然后允许栅极电容放电。 在栅极电容充电的情况下，即使不连续施加驱动信号，驱动晶体管保持导通期望的时间段，从而节省功率。 本质上，栅极电容以存储单元的方式被利用。 此外，在较高频率的操作中，代替栅极电容完全充电，导致关断时间增加，栅极电容仅部分充电，允许更快地转动。 因此，在电信应用中开关模式电源的信封跟随能力增加。 根据本发明的另一方面，在具有相位路径和幅度路径的RF放大电路中，提供具有至少最后级的放大器，放大器具有耦合到相位路径的RF输入; 并且开关模式电源耦合到工作电压和放大器的电源输入端。 开关模式电源包括晶体管开关，用于驱动晶体管开关的驱动电路和控制器，该控制器使得驱动电路在电荷转移模式下工作，其中相对于开关占空比的短持续时间的脉冲 模式电源用于打开晶体管开关。

公开(公告)号：US07657097B2

公开(公告)日：2010-02-02

申请号：US10349402

申请日：2003-01-21

申请人： Bojan Silic

发明人： Bojan Silic

IPC分类号： G06K9/66

CPC分类号： G09G3/00

摘要： A system and method of producing an image using a plurality of independent pixel devices, each of which includes one or more light emitting or polarizing elements. The pixel devices are fixed (e.g. on the side of a building) or are moving (e.g. on water or falling in air) within an image space in which an image is to be formed. A controller determines, based upon the locations of the pixel devices within the image space, what portion of the image each pixel device is to reproduce, and then commands the pixel devices to use the emitting devices to reproduce the corresponding portion of the image. As the pixel devices move, the new locations of the pixel devices are mapped onto the image, and the control of the pixel devices is modified accordingly so that the image produced by the pixel devices is not distorted by their movement.

摘要翻译： 使用多个独立像素装置产生图像的系统和方法，每个像素装置包括一个或多个发光或偏振元件。 像素装置是固定的（例如，在建筑物的侧面）或正在移动（例如，在水中或落在空气中）在其中将形成图像的图像空间内。 控制器基于图像空间内的像素设备的位置来确定每个像素设备将要再现哪一部分图像，然后命令像素设备使用发射设备来再现图像的相应部分。 当像素装置移动时，像素装置的新位置被映射到图像上，相应地修改像素装置的控制，使得由像素装置产生的图像不被它们的移动扭曲。

公开(公告)号：US07429919B2

公开(公告)日：2008-09-30

申请号：US10942580

申请日：2004-09-16

申请人： Bojan Silic ,  Timm Peddie

发明人： Bojan Silic ,  Timm Peddie

IPC分类号： G08G1/095

CPC分类号： G08G1/0962 ,  G08G1/005 ,  G08G1/095

摘要： A system, apparatus and methods are described that wirelessly communicate with its environment in response to stimuli generated locally within a communication device or within a remote activation device.

摘要翻译： 描述了系统，装置和方法，其响应于在通信设备内或在远程激活设备内本地产生的刺激与其环境无线通信。