专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08237599B2 Analog-to-digital converter in a motor control device 有权
标题翻译：电机控制装置中的模数转换器
公开(公告)号：US08237599B2
公开(公告)日：2012-08-07
申请号：US12627734
申请日：2009-11-30
申请人： Joe A. Marrero , Lynn R. Kern , Scott C. McLeod
发明人： Joe A. Marrero , Lynn R. Kern , Scott C. McLeod
IPC分类号： H03M1/56
CPC分类号： H03K7/08 , H03M1/56
摘要： System and method for digitizing analog voltage signals. A first voltage signal may be received at a comparator. A ramp signal may be received at the comparator. The ramp signal may be generated by a ramp generator. An output signal may be generated by the comparator. The output signal may indicate whether the analog voltage signal or the ramp signal is greater. The output signal may be conveyed to logic circuitry by the comparator. Control information may be conveyed by the logic circuitry to the ramp generator. The ramp generator may generate the ramp signal based on the control information. The logic circuitry may determine a digital representation of the first voltage signal based on the output signal from the comparator and the control information.
摘要翻译：数字化模拟电压信号的系统和方法。可以在比较器处接收第一电压信号。可以在比较器处接收斜坡信号。斜坡信号可以由斜坡发生器产生。输出信号可以由比较器产生。输出信号可以指示模拟电压信号或斜坡信号是否较大。输出信号可以由比较器传送到逻辑电路。控制信息可以由逻辑电路传送到斜坡发生器。斜坡发生器可以基于控制信息产生斜坡信号。逻辑电路可以基于来自比较器的输出信号和控制信息来确定第一电压信号的数字表示。

2. 发明申请

US20110128085A1 Analog-to-Digital Converter in a Motor Control Device 有权
标题翻译：电机控制装置中的模数转换器
公开(公告)号：US20110128085A1
公开(公告)日：2011-06-02
申请号：US12627734
申请日：2009-11-30
申请人： Joe A. Marrero , Lynn R. Kern , Scott C. McLeod
发明人： Joe A. Marrero , Lynn R. Kern , Scott C. McLeod
IPC分类号： H03K7/08
CPC分类号： H03K7/08 , H03M1/56
摘要： System and method for digitizing analog voltage signals. A first voltage signal may be received at a comparator. A ramp signal may be received at the comparator. The ramp signal may be generated by a ramp generator. An output signal may be generated by the comparator. The output signal may indicate whether the analog voltage signal or the ramp signal is greater. The output signal may be conveyed to logic circuitry by the comparator. Control information may be conveyed by the logic circuitry to the ramp generator. The ramp generator may generate the ramp signal based on the control information. The logic circuitry may determine a digital representation of the first voltage signal based on the output signal from the comparator and the control information.
摘要翻译：数字化模拟电压信号的系统和方法。可以在比较器处接收第一电压信号。可以在比较器处接收斜坡信号。斜坡信号可由斜坡发生器产生。输出信号可以由比较器产生。输出信号可以指示模拟电压信号或斜坡信号是否较大。输出信号可以由比较器传送到逻辑电路。控制信息可以由逻辑电路传送到斜坡发生器。斜坡发生器可以基于控制信息产生斜坡信号。逻辑电路可以基于来自比较器的输出信号和控制信息来确定第一电压信号的数字表示。

3. 发明授权

US08368334B2 Brushless, three phase motor drive 有权
标题翻译：无刷，三相电机驱动
公开(公告)号：US08368334B2
公开(公告)日：2013-02-05
申请号：US12620726
申请日：2009-11-18
申请人： Lynn R. Kern , Scott C. McLeod , Kenneth W. Gay
发明人： Lynn R. Kern , Scott C. McLeod , Kenneth W. Gay
IPC分类号： H02P6/00
CPC分类号： H02P6/182 , F04D27/004 , H02P27/085
摘要： A control method for a brushless, three-phase DC motor. A voltage induced by rotation of a rotor may be sampled at a first expected zero crossing value to produce a first sampled voltage value. An average of a plurality of sampled voltage values, including voltage values sampled at a plurality of prior expected zero crossing values and the first sampled voltage value, may be calculated. The first sampled voltage value may be subtracted from the calculated average to produce a delta zero crossing error. A pulse-width modulation duty cycle may be adjusted based on the delta zero crossing error. The pulse-width modulation duty cycle may be used to control a rotational velocity of the rotor.
摘要翻译：一种无刷三相直流电动机的控制方法。可以在第一预期过零值处对由转子旋转引起的电压进行采样，以产生第一采样电压值。可以计算多个采样电压值的平均值，包括在多个先前预期过零值处采样的电压值和第一采样电压值。可以从计算的平均值中减去第一采样电压值，以产生Δ零交叉误差。脉冲宽度调制占空比可以根据增量零交叉误差进行调整。脉冲宽度调制占空比可用于控制转子的旋转速度。

4. 发明申请

US20110115423A1 Brushless, Three Phase Motor Drive 有权
标题翻译：无刷三相电机驱动
公开(公告)号：US20110115423A1
公开(公告)日：2011-05-19
申请号：US12620726
申请日：2009-11-18
申请人： Lynn R. Kern , Scott C. McLeod , Kenneth W. Gay
发明人： Lynn R. Kern , Scott C. McLeod , Kenneth W. Gay
IPC分类号： H02P6/18
CPC分类号： H02P6/182 , F04D27/004 , H02P27/085
摘要： A control method for a brushless, three-phase DC motor. A voltage induced by rotation of a rotor may be sampled at a first expected zero crossing value to produce a first sampled voltage value. An average of a plurality of sampled voltage values, including voltage values sampled at a plurality of prior expected zero crossing values and the first sampled voltage value, may be calculated. The first sampled voltage value may be subtracted from the calculated average to produce a delta zero crossing error. A pulse-width modulation duty cycle may be adjusted based on the delta zero crossing error. The pulse-width modulation duty cycle may be used to control a rotational velocity of the rotor.
摘要翻译：一种无刷三相直流电动机的控制方法。可以在第一预期过零值处对由转子旋转引起的电压进行采样，以产生第一采样电压值。可以计算多个采样电压值的平均值，包括在多个先前预期过零值处采样的电压值和第一采样电压值。可以从计算的平均值中减去第一采样电压值，以产生Δ零交叉误差。脉冲宽度调制占空比可以根据增量零交叉误差进行调整。脉冲宽度调制占空比可用于控制转子的旋转速度。

5. 发明授权

US08558530B2 Low power regulator 有权
标题翻译：低功率调节器
公开(公告)号：US08558530B2
公开(公告)日：2013-10-15
申请号：US13110317
申请日：2011-05-18
申请人： Srinivas K. Pulijala , Scott C. McLeod
发明人： Srinivas K. Pulijala , Scott C. McLeod
IPC分类号： G05F3/16
CPC分类号： G05F1/56
摘要： A voltage regulator may derive current from a bias circuitry having a constant-transconductance. The bias circuitry may generate the bias current using three NMOS devices. The temperature coefficient of the bias current may be within a specified, desired range. The bias current may be mirrored to low-power regulator circuitry to bias a diode-connected transistor in the low-power regulator circuitry to operate in the strong inversion region. A ratioed current based on the output load current may be injected into a bipolar junction transistor (BJT) device to cause the gate-source voltage (VGS) of the diode-connected device to track the VGS of the output transistor of the voltage regulator, to ensure tighter load regulation. By operating the diode-connected transistor in strong inversion, by maintaining its (VGS) constant over temperature, and by cancelling the VGS of the output transistor of the voltage regulator with the base-emitter voltage (VBE) of the BJT device, the regulated voltage output may become free of the effects of temperature and supply voltage.
摘要翻译：电压调节器可以从具有恒定跨导的偏置电路获得电流。偏置电路可以使用三个NMOS器件产生偏置电流。偏置电流的温度系数可以在规定的期望范围内。偏置电流可以被镜像到低功率调节器电路，以将低功率调节器电路中的二极管连接的晶体管偏置以在强反转区域中操作。基于输出负载电流的比电流可以被注入到双极结型晶体管（BJT）器件中，以使二极管连接的器件的栅源电压（VGS）跟踪电压调节器的输出晶体管的VGS，以确保更严格的负载调节。通过在强反转中操作二极管连接的晶体管，通过使其（VGS）的温度保持恒定，并且通过用BJT器件的基极 - 发射极电压（VBE）消除电压调节器的输出晶体管的VGS，电压输出可能没有温度和电源电压的影响。

6. 发明授权

US08237449B2 Bi-directional high side current sense measurement 有权
标题翻译：双向高边电流检测测量
公开(公告)号：US08237449B2
公开(公告)日：2012-08-07
申请号：US12788896
申请日：2010-05-27
申请人： Madan G. Rallabandi , Scott C. McLeod
发明人： Madan G. Rallabandi , Scott C. McLeod
IPC分类号： G01R31/08
CPC分类号： G01R19/10 , G01R1/203
摘要： A system for measuring a voltage drop between two nodes in an electrical circuit, comprising a switched capacitor integrator (SCI), a comparator and a counter. The SCI alternately (a) captures charge onto a set of sampling capacitors and (b) selectively accumulates/transfers the charge onto a pair of integration capacitors, where the charge includes a first portion that is based on the voltage drop and a second portion that depends on a digital indicator signal. The comparator generates the digital indicator signal based on whether an analog output of the SCI is positive or negative. The counter counts a number of ones occurring in the digital indicator signal during a measurement interval. At the end of the measurement interval, the count value represents a measure of the voltage drop. Knowing the resistance between the two nodes, the voltage drop may be converted into a current measurement.
摘要翻译：一种用于测量电路中两个节点之间的电压降的系统，包括开关电容积分器（SCI），比较器和计数器。 SCI交替地（a）将电荷捕获到一组采样电容器上，并且（b）选择性地将电荷累积/传送到一对积分电容器，其中电荷包括基于电压降的第一部分和第二部分，取决于数字指示灯信号。比较器根据SCI的模拟输出是正还是负，产生数字指示信号。在测量间隔期间，计数器对数字指示信号中发生的数目进行计数。在测量间隔结束时，计数值表示电压降的度量。知道两个节点之间的电阻，电压降可以转换为电流测量。

7. 发明授权

US07893670B2 Frequency compensation scheme for stabilizing the LDO using external NPN in HV domain 有权
标题翻译：用于在HV域中稳定LDO使用外部NPN的频率补偿方案
公开(公告)号：US07893670B2
公开(公告)日：2011-02-22
申请号：US12389581
申请日：2009-02-20
申请人： Srinivas K. Pulijala , Scott C. McLeod
发明人： Srinivas K. Pulijala , Scott C. McLeod
IPC分类号： G05F1/00
CPC分类号： G05F1/575
摘要： A voltage regulator may comprise a regulator output configured to provide a regulated voltage, which may be controlled by an error amplifier based on the regulated voltage and a reference voltage. The error amplifier may control a source-follower stage to mirror a multiple of the current flowing in the source-follower stage into an internal pass device. A voltage developed by the mirror current may control an external pass device configured to deliver the load current into the regulator output. A first resistor may be configured to decouple a load capacitor coupled between the regulator output and reference ground, when the load current is below a specified value. A second resistor may be configured to create a bias current in the internal pass device even when the external pass device is close to cut-off region. A third resistor may be configured to counter the effects of negative impedance at the control terminal of the external pass device caused by the current-gain of the external pass device. A compensation capacitor and resistor may be coupled in series between the output of the error amplifier and the output of the voltage regulator to provide frequency compensation for the Miller-Effect.
摘要翻译：电压调节器可以包括被配置为提供调节电压的调节器输出，其可以由基于调节电压和参考电压的误差放大器控制。误差放大器可以控制源极跟随器级将在源极跟随器级中流动的电流的倍数镜像成内部通过器件。由反射镜电流产生的电压可以控制配置成将负载电流传递到调节器输出中的外部通过装置。当负载电流低于规定值时，第一电阻器可以被配置为去耦耦合在调节器输出端和参考地之间的负载电容器。第二电阻器可以被配置为在内部通路器件中产生偏置电流，即使当外部通过器件接近截止区域时。第三电阻器可以被配置为对抗由外部通过器件的电流增益引起的外部通过器件的控制端子处的负阻抗的影响。补偿电容器和电阻器可以串联耦合在误差放大器的输出端和电压调节器的输出端之间，为米勒效应提供频率补偿。

8. 发明申请

US20090322351A1 Adaptive Capacitive Sensing 审中-公开
标题翻译：自适应电容感测
公开(公告)号：US20090322351A1
公开(公告)日：2009-12-31
申请号：US12367336
申请日：2009-02-06
申请人： Scott C. McLeod
发明人： Scott C. McLeod
IPC分类号： G01R27/26 , G06F15/00 , G06F3/045
CPC分类号： G06F3/044 , G06F3/0416 , H03K17/002 , H03K17/962 , H03K2217/96075
摘要： A capacitive sensing circuit may comprise an RC (resistive-capacitive) bridge circuit, with a switching signal simultaneously applied to a reference path, and a signal path comprising the capacitance to be detected. Small perturbations in the capacitance may be detected by mixing/correlating a difference signal representative of the difference between the reference path signal and the signal path signal, to the switching signal. The output of the mixer may be filtered to virtually eliminate all EMI signals. A narrowband approach may also allow filtering of unwanted signals, enabling operation in systems susceptible to high levels of noise. Frequency stepping of the switching signal may minimize inband signal interference, and allow operation in the presence of many signals that would otherwise result in failure of the sensing circuit. Pad calibration may be implemented to free the user from a need to characterize each button channel capacitance and tailor the operation for each channel.
摘要翻译：电容感测电路可以包括RC（电阻 - 电容）桥接电路，其中切换信号同时施加到参考路径，以及包括要检测的电容的信号路径。可以通过将表示参考路径信号和信号路径信号之间的差的差分信号混合/相关到切换信号来检测电容中的微小扰动。可以对混频器的输出进行滤波以实际消除所有EMI信号。窄带方法还可以允许对不需要的信号进行滤波，使得能够在易受高水平噪声的系统中进行操作。切换信号的频率步进可以使带内信号干扰最小化，并允许存在否则会导致感测电路故障的许多信号的操作。可以实施垫校准以使用户不需要表征每个按钮通道电容并且调整每个通道的操作。

9. 发明申请

US20090237117A1 ELECTRICAL PHYSICAL LAYER ACTIVITY DETECTOR 有权
标题翻译：电气物理层活动检测器
公开(公告)号：US20090237117A1
公开(公告)日：2009-09-24
申请号：US12050223
申请日：2008-03-18
申请人： Scott C. McLeod
发明人： Scott C. McLeod
IPC分类号： H03K5/00
CPC分类号： H03F3/3076 , H03F3/45
摘要： A low-current differential signal activity detector circuit may be configured to reject large common mode signals on differential input lines, while still detecting smaller differential signals applied to the same set of differential input lines. The detector circuit may comprise a translinear buffer that is driven at the buffer input and at the buffer output by the differential input signals. The differential signal thereby driving the inputs of the detector circuit may be half-wave rectified through the buffer output devices and may be filtered to provide the detected output. When applying a common mode signal, the buffer's input and output may track each other, and no current may be rectified in the output devices, thus providing common-mode signal rejection. The detector circuit may also be configured with two buffers having their outputs coupled to a common node, each buffer input driven by a respective one of the differential input signals. The differential signal thereby driving the inputs of the detector circuit may be fully rectified through the output devices of the two buffers, and may be filtered to provide the detected output. The two buffers may be configured in a symmetrical structure that allows for the rejection of common-mode signals when the outputs of the buffers are coupled to a common node.
摘要翻译：低电流差分信号活动检测器电路可以被配置为在差分输入线上抑制大的共模信号，同时仍然检测到施加到同一组差分输入线的较小的差分信号。检测器电路可以包括在缓冲器输入处被驱动并且通过差分输入信号在缓冲器输出处被驱动的跨线性缓冲器。因此驱动检测器电路的输入的差分信号可以通过缓冲器输出装置进行半波整流，并且可以被滤波以提供检测的输出。当应用共模信号时，缓冲器的输入和输出可以彼此跟踪，并且在输出设备中不会纠正电流，从而提供共模信号抑制。检测器电路还可以配置有两个缓冲器，其具有耦合到公共节点的输出，每个缓冲器输入由差分输入信号中的相应一个驱动。由此驱动检测器电路的输入的差分信号可以通过两个缓冲器的输出装置完全整流，并且可以被滤波以提供检测到的输出。两个缓冲器可以配置成对称结构，当缓冲器的输出耦合到公共节点时允许抑制共模信号。

10. 发明申请

US20090220219A1 Delta-Sigma Modulator for a Fan Driver 有权
标题翻译：用于风扇驱动器的Delta-Sigma调制器
公开(公告)号：US20090220219A1
公开(公告)日：2009-09-03
申请号：US12040554
申请日：2008-02-29
申请人： Scott C. McLeod , Chao-Ming Tsai
发明人： Scott C. McLeod , Chao-Ming Tsai
IPC分类号： H02P7/285
CPC分类号： H02P7/285
摘要： A fan driver circuit for powering a fan with a linear voltage may be designed using digital design techniques, resulting in a testable, accurate circuit on a smaller die size. The fan driver circuit may be configured to receive a digital control signal, which may be a sequence of numeric values, e.g. multiple-bit binary numbers, each indicative of a desired present rotational speed of the fan. The fan driver circuit may be implemented using a digital modulator, e.g. a delta-sigma modulator, with a simple low-pass filter, e.g. an RC-filter at the output, and may use oversampling based on a system clock, to shift in-band noise to out-of-band frequencies, and digital interpolation to filter out unwanted images from the upsampled digital control signal. The delta-sigma modulator may be constructed as a first-order delta-sigma modulator using an error-feedback structure to reduce die size.
摘要翻译：可以使用数字设计技术设计用于为线性电压供电的风扇的风扇驱动器电路，从而在较小的管芯尺寸上产生可测试的精确电路。风扇驱动器电路可以被配置为接收数字控制信号，数字控制信号可以是数字序列的序列，例如。多位二进制数，每个指示风扇的期望的当前转速。风扇驱动器电路可以使用数字调制器来实现，例如，具有简单的低通滤波器的Δ-Σ调制器，例如。输出端的RC滤波器，并且可以使用基于系统时钟的过采样来将带内噪声移位到带外频率，以及数字内插以从上采样的数字控制信号滤除不需要的图像。 Δ-Σ调制器可以被构造为使用误差反馈结构来减小管芯尺寸的一阶Δ-Σ调制器。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式