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11.发明授权Synchronous buck and boost regulator power reduction circuit using high side sensing 有权同步降压和升压调节器功率降低电路采用高端感应公开(公告)号：US06995483B2
公开(公告)日：2006-02-07
申请号：US10271016
申请日：2002-10-15
申请人： James A. Kohout , David J. Baldwin
发明人： James A. Kohout , David J. Baldwin
CPC分类号： H02M3/1588 , H02M1/32 , H02M2001/0009 , Y02B70/1466
摘要： A synchronous DC-DC regulator, adapted to receive a high side pulsed signal and a low side pulsed signal that is substantially the inverse of the high side pulsed signal. The regulator includes an inductor, and a capacitor having one port connected to ground, and having a second port providing an output voltage of the DC-DC regulator. A driver is provided for driving pulses of current to the inductor when the high side pulsed signal is asserted. An undercurrent sense circuit is adapted to sense a driving current flowing through the driver and to assert a disable signal when the driving current is less than a predetermined amount. An enable/disable circuit is adapted to allow the low side pulsed signal to turn the switch on when the disable signal is not asserted, and to not allow the low side pulsed signals from turning the switch on when the disable signal is asserted.
摘要翻译： 同步DC-DC调节器，适于接收高侧脉冲信号和基本上与高侧脉冲信号相反的低侧脉冲信号。 调节器包括电感器和具有连接到地的一个端口的电容器，并且具有提供DC-DC调节器的输出电压的第二端口。 当提供高侧脉冲信号时，提供驱动器来驱动电流脉冲到电感器。 欠流检测电路适于检测流过驱动器的驱动电流，并且当驱动电流小于预定量时，断言禁用信号。 启用/禁用电路适于允许低侧脉冲信号在禁用信号未被置位时接通，并且当禁用信号被断言时不允许低侧脉冲信号接通开关。
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公开(公告)号：US06859020B2
公开(公告)日：2005-02-22
申请号：US10270921
申请日：2002-10-15
申请人： David J. Baldwin , James A. Kohout
发明人： David J. Baldwin , James A. Kohout
CPC分类号： H02M3/156 , H02M3/1588 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
摘要： A DC/DC converter has a semiconductor switch coupled to an inductor, a capacitor and a rectifier. A comparator is coupled to across the rectifier to detect a polarity reversal during the second portion of converter operation to place the converter in a low power mode if the voltage across the rectifier is of an appropriate polarity for reverse current flow. The rectifier may be a synchronous rectifier transistor and the voltage converter placed in a low power mode when the polarity across the synchronous rectifier indicates that reverse current flow is possible. A timing circuit delays the generation of the control signal to place the converter in a low power mode until the steady state current is below a predetermined threshold for a predetermined amount of time. The synchronous rectifier may be turned OFF when the current through the converter falls below another predetermined threshold value and the voltage across the synchronous rectifier will become the voltage across the parasitic diode of the FET synchronous rectifier.
摘要翻译： DC / DC转换器具有耦合到电感器，电容器和整流器的半导体开关。 比较器耦合到整流器两端以在转换器操作的第二部分期间检测极性反转，以便如果整流器两端的电压对于反向电流流动具有适当极性，则将转换器置于低功率模式。 整流器可以是同步整流器晶体管，并且当跨同步整流器的极性表示反向电流流动是可能的时，电压转换器处于低功率模式。 定时电路延迟控制信号的产生，以将转换器置于低功率模式，直到稳态电流低于预定阈值达预定时间量。 当通过转换器的电流低于另一预定阈值时，同步整流器可能被关断，同步整流器两端的电压将成为FET同步整流器的寄生二极管两端的电压。
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公开(公告)号：US20090054023A1
公开(公告)日：2009-02-26
申请号：US11844860
申请日：2007-08-24
IPC分类号： H04B1/16
CPC分类号： H03F3/2173
摘要： Audio amplifiers and methods of generating audio signals are disclosed. A disclosed example amplifier comprises a first driver to receive a first signal; a second driver to receive a second signal; a configurable signal delivery circuit; and a mode selector in communication with the first and second drivers to selectively configure the signal delivery circuit in a voltage boost mode or a voltage buck-boost mode based on a characteristic of the input signal.
摘要翻译： 公开了音频放大器和产生音频信号的方法。 公开的示例放大器包括：第一驱动器，用于接收第一信号; 接收第二信号的第二驱动器; 可配置信号传送电路; 以及与所述第一和第二驱动器通信的模式选择器，以基于所述输入信号的特性选择性地将所述信号传递电路配置为升压模式或电压降压 - 升压模式。
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公开(公告)号：US07323793B2
公开(公告)日：2008-01-29
申请号：US10740998
申请日：2003-12-19
CPC分类号： H03F3/21 , H03F1/02 , H03F1/34 , H03F1/56 , Y10T307/422
摘要： A system and method for driving a load at a desired operating level. A driver is connected to a load. The load can be selected from a plurality of loads by a selection system, such as a multiplexer, or a single load can be utilized. Feedback from the load is provided to the driver for achieving the desired operating level. A zero temperature coefficient resistance formed by two resistors having different resistances can be used so that the driver emulates an ideal resistor having a substantially zero temperature coefficient, providing a temperature independent current to the load.
摘要翻译： 一种用于以期望的操作水平驱动负载的系统和方法。 驱动器连接到负载。 可以通过诸如多路复用器之类的选择系统从多个负载中选择负载，或者可以使用单个负载。 来自负载的反馈被提供给驾驶员以实现期望的操作水平。 可以使用由具有不同电阻的两个电阻器形成的零温度系数电阻，使得驱动器模拟具有基本为零的温度系数的理想电阻器，为负载提供与温度无关的电流。
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公开(公告)号：US20120235745A1
公开(公告)日：2012-09-20
申请号：US13047505
申请日：2011-03-14
申请人： Brett Forejt , Jeff Berwick , David J. Baldwin
发明人： Brett Forejt , Jeff Berwick , David J. Baldwin
IPC分类号： H03F3/45
CPC分类号： H03F3/45654 , H03F3/45179 , H03F2203/45528 , H03F2203/45562 , H03F2203/45594 , H03G1/0029 , H03G1/007
摘要： An apparatus and method are provided. Generally, an input signal is applied across a main path (through an input network) and across a cancellation path (through a cancellation circuit). The cancellation circuit subtracts a cancellation current from the main path as part of the control mechanism, where the magnitude of the cancellation current is based on a gain control signal (that has been linearized to follow a control voltage).
摘要翻译： 提供了一种装置和方法。 通常，输入信号跨越主路径（通过输入网络）并跨越抵消路径（通过消除电路）施加。 消除电路从主路径减去作为控制机构的一部分的消除电流，其中消除电流的大小基于增益控制信号（已被线性化以跟随控制电压）。
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公开(公告)号：US07633336B2
公开(公告)日：2009-12-15
申请号：US11844860
申请日：2007-08-24
IPC分类号： H03F3/38
CPC分类号： H03F3/2173
摘要： Audio amplifiers and methods of generating audio signals are disclosed. A disclosed example amplifier comprises a first driver to receive a first signal; a second driver to receive a second signal; a configurable signal delivery circuit; and a mode selector in communication with the first and second drivers to selectively configure the signal delivery circuit in a voltage boost mode or a voltage buck-boost mode based on a characteristic of the input signal.
摘要翻译： 公开了音频放大器和产生音频信号的方法。 公开的示例放大器包括：第一驱动器，用于接收第一信号; 接收第二信号的第二驱动器; 可配置信号传送电路; 以及与所述第一和第二驱动器通信的模式选择器，以基于所述输入信号的特性选择性地将所述信号传递电路配置为升压模式或电压降压 - 升压模式。
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公开(公告)号：US20130264973A1
公开(公告)日：2013-10-10
申请号：US13443741
申请日：2012-04-10
申请人： Mayank Garg , David Hernandez-Garduno , Brandon J. Beckham , David J. Baldwin , Brett E. Forejt
发明人： Mayank Garg , David Hernandez-Garduno , Brandon J. Beckham , David J. Baldwin , Brett E. Forejt
IPC分类号： H02K33/00
CPC分类号： H02P6/006 , G06F3/016 , G06F3/0416 , H02P6/182 , H02P7/00 , H02P25/02 , H02P25/032
摘要： A method for driving a Linear Resonant Actuator (LRA) is provided. During a first off interval, the back-emf of the LRA is measured. During a first off interval, a timer is started when the back-emf reaches a predetermined threshold, and after a predetermined delay has lapsed following the back-emf reaching the predetermined threshold during the first off interval, the LRA is driven over a drive interval having a length and drive strength. A second off interval is entered following the drive interval, and during the second off interval, the back-emf of the LRA is measured. During the second off interval, the timer is stopped when the back-emf reaches the predetermined threshold. The value from the timer that corresponds to the duration between the back-emf reaching the predetermined threshold during the first off interval and the back-emf reaching the predetermined threshold during the second off interval determines the length.
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公开(公告)号：US08008969B1
公开(公告)日：2011-08-30
申请号：US12750494
申请日：2010-03-30
申请人： Brett E. Forejt , David J. Baldwin
发明人： Brett E. Forejt , David J. Baldwin
IPC分类号： H03F3/38
CPC分类号： H03F3/005 , H03F3/217 , H03F3/45475 , H03F2200/03 , H03F2200/408 , H03F2203/45512 , H03F2203/45528 , H03F2203/45544 , H03F2203/45594
摘要： Traditionally, switching amplifiers (i.e., class-D and class-G) with negative supply rails had issues with direct current (DC) power loss, included large external capacitors, had a comparative reduction in efficiency, and oftentimes included separate power management circuits. Here, a class-D amplifier is provided with an output stage that provides negative supply voltages, positive supply voltages, and ground. Essentially, this amplifier provides some of the benefits of the conventional amplifiers without the drawbacks.
摘要翻译： 传统上，具有负电源轨的开关放大器（即D类和G类）具有直流（DC）功率损耗的问题，包括大的外部电容器，效率相对降低，并且通常包括单独的功率管理电路。 这里，D类放大器具有提供负电源电压，正电源电压和接地的输出级。 本质上，该放大器提供了常规放大器的一些优点，而没有缺点。
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19.发明授权公开(公告)号：US07072776B2
公开(公告)日：2006-07-04
申请号：US10985388
申请日：2004-11-09
CPC分类号： G01F1/698
摘要： A system and method are provided to regulate resistance in a discontinuous time hot-wire anemometer. The solution removes supply voltage dependency on the mass airflow output signal. Operating the hot-wire anemometer using discontinuous time regulation offers lower system power, but introduces an inverse supply dependent term in the associated transfer function. This effect is removed by multiplying the output signal via a supply dependent signal.
摘要翻译： 提供了一种用于调节不连续时间热线风速计中的电阻的系统和方法。 该解决方案消除了对质量气流输出信号的电源电压依赖性。 使用不连续时间调节操作热线风速计提供较低的系统功率，但在相关的传递函数中引入了逆供电相关项。 通过经由电源相关信号乘以输出信号来消除这种影响。
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20.发明授权System and method for regulating bridge voltage in a discontinuous-time hot-wire anemometer 有权用于调节不连续时间热线风速计电桥电压的系统和方法公开(公告)号：US07013725B1
公开(公告)日：2006-03-21
申请号：US11079675
申请日：2005-03-14
IPC分类号： G01F1/68
CPC分类号： G01F1/696
摘要： In accordance with the teachings of the present invention, a system and method for regulating bridge voltage in a discrete-time hot-wire anemometer is provided. In a particular embodiment, the hot-wire anemometer includes a bridge circuit including a hot-wire resistor, first and second input terminals, and first and second output terminals, the hot-wire resistor having a resistance dependent at least in part on an airflow past the hot-wire resistor. The hot-wire anemometer further includes a first operational amplifier coupled to the output terminals of the bridge circuit, the first operational amplifier operable to generate an output signal in response to a voltage differential across the first and second output terminals of the bridge circuit, and a second operational amplifier operable to generate an output signal in response to the output signal of the first operational amplifier and to a discontinuous time control signal. A switching mechanism cycles a supply voltage to the input terminals of the bridge circuit in response to output signal of the second operational amplifier such that the supply voltage is intermittently connected to the input terminals the bridge circuit, and an inductor coupling the switching mechanism to the first input terminal of the bridge circuit operable to low-pass filter an output voltage of the bridge circuit.
摘要翻译： 根据本发明的教导，提供了一种用于在离散时间热线风速计中调节桥电压的系统和方法。 在特定实施例中，热线风速计包括一个桥接电路，该桥接电路包括一个热线电阻器，第一和第二输入端子以及第一和第二输出端子，该热线电阻器具有至少部分取决于气流 过热线电阻。 所述热线风速计还包括耦合到所述桥接电路的输出端的第一运算放大器，所述第一运算放大器可操作以响应桥电路的第一和第二输出端的电压差产生输出信号，以及 第二运算放大器，用于响应于第一运算放大器的输出信号和不连续的时间控制信号产生输出信号。 切换机构响应于第二运算放大器的输出信号而将电源电压循环到桥式电路的输入端，使得电源电压间歇地连接到桥式电路的输入端，以及将开关机构耦合到 桥接电路的第一输入端子可操作以对桥式电路的输出电压进行低通滤波。
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