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1. 发明授权

US5617058A Digital signal processing for linearization of small input signals to a tri-state power switch 失效
标题翻译：数字信号处理，用于将小输入信号线性化到三态电源开关
公开(公告)号：US5617058A
公开(公告)日：1997-04-01
申请号：US556615
申请日：1995-11-13
申请人： Andrew A. Adrian , Michael S. Danielson , David B. Meyers , Leo Spiegel
发明人： Andrew A. Adrian , Michael S. Danielson , David B. Meyers , Leo Spiegel
IPC分类号： H03F1/32 , H03F3/217 , H03F3/38
CPC分类号： H03F1/3264 , H03F3/217 , H03F2200/331
摘要： An all digital switching amplifier wherein linearization of the power switch is accomplished solely by using three states. A small, fixed width, bi-state compensating carrier waveform is added to the leading or training edges of an oversampled main input pulse producing a compensated composite waveform. This compensating carrier linearizes output from a power switch by effecting common mode cancellation of switch time errors. Output pulse width combinations for the compensating carrier are obtained from a look-up table stored in memory. A correction mechanism is implemented to correct for harmonic distortion that is dependent on the modulation level or index and results from the compensating carrier modulation. The correction mechanism applies the inverse of the modulation induced distortion to the oversampled compensated composite input signal to null distortion products resulting from the modulation scheme used to apply the small carrier to linearize the performance of the tri-state power switch. Digital timing control of the power switch's deadband ensures accuracy of the timing and sequence in which individual switches within the power switch H-bridge are turned off and turned on, so as to preclude a short circuit across the power supply. A high speed clock used in linearizing the power switch provides a timing reference to generate the necessary deadband timing delays and pulse width increments. The output bridge uses enhancement mode MOSFETs.
摘要翻译：一种全数字开关放大器，其中功率开关的线性化仅通过使用三种状态完成。将小的，固定宽度的双态补偿载波波形添加到过采样主输入脉冲的前沿或训练边缘，产生补偿复合波形。该补偿载波通过实现共模消除开关时间误差来线性化电力开关的输出。用于补偿载体的输出脉冲宽度组合从存储在存储器中的查找表获得。执行校正机制来校正取决于调制电平或指标的谐波失真以及来自补偿载波调制的结果。校正机制将调制诱发失真的逆向应用于过采样补偿复合输入信号，由用于应用小载波的调制方案产生的零失真产物使三态功率开关的性能线性化。电源开关死区的数字定时控制可确保电源开关H桥内的各个开关关断和接通的时序和顺序的精度，以防止电源短路。用于线性化功率开关的高速时钟提供定时参考，以产生必要的死区定时延迟和脉冲宽度增量。输出桥使用增强型MOSFET。

2. 发明授权

US4598586A Compensation of gain temperature coefficient in an optical pick-off for an accelerometer 失效
标题翻译：用于加速度计的光学拾取器中的增益温度系数的补偿
公开(公告)号：US4598586A
公开(公告)日：1986-07-08
申请号：US646150
申请日：1984-08-31
申请人： Michael S. Danielson
发明人： Michael S. Danielson
IPC分类号： G01P1/00 , G01P15/093 , G01P15/13
CPC分类号： G01P15/093 , G01P1/006 , G01P15/132
摘要： Apparatus for compensating an optical sensor utilizing a light emitting diode and a monolithic dual element photodiode as a null position sensor for changes in optical output efficiency or gain due to variations in temperature without knowledge of relative or absolute temperature. The optical sensor includes a light emitting diode and a dual element photodiode spaced apart from the light emitting diode and located so that each element of the dual element photodiode is equally illuminated. A pendulous mass is disposed between the light emitting diode and the dual element photodiode detector such that as it moves the amount of illumination received by each of the dual elements differs. Electrical apparatus is provided for producing a first signal proportional to the difference in output from the two photodiode elements, and this signal is used to null the position of the pendulous mass. A second signal is produced which is proportional to the sum of the outputs from the two photodiode elements, and this signal is utilized to alter the current to the light emitting diode so that the second signal is maintained at a predetermined reference level. In this way, the overall gain of the optical sensor is maintained within narrow limits to compensate for temperature induced variations in sensor gain.
摘要翻译：用于补偿使用发光二极管的光学传感器和单片双元件光电二极管作为零位传感器的装置，用于在不知道相对温度或绝对温度的情况下由于温度变化而导致的光输出效率或增益的变化。光学传感器包括发光二极管和与发光二极管间隔开的双元件光电二极管，并且被定位成使得双元件光电二极管的每个元件被均匀地照亮。在发光二极管和双元件光电二极管检测器之间设置有一个下摆质量，使得当它移动由每个双重元件接收的照明量不同时。提供电气设备用于产生与两个光电二极管元件的输出差成比例的第一信号，并且该信号用于使下摆质量的位置无效。产生与两个光电二极管元件的输出的总和成比例的第二信号，并且该信号用于改变到发光二极管的电流，使得第二信号保持在预定的参考电平。以这种方式，光学传感器的总体增益保持在窄限度内，以补偿传感器增益中的温度引起的变化。

3. 发明授权

US07362594B2 Adaptive resonant switching power system 失效
标题翻译：自适应谐振开关电源系统
公开(公告)号：US07362594B2
公开(公告)日：2008-04-22
申请号：US10541227
申请日：2003-12-31
申请人： Ping Tsui , Michael S. Danielson
发明人： Ping Tsui , Michael S. Danielson
IPC分类号： H02M3/335
CPC分类号： H03F3/217 , H02M1/088 , H02M3/3382 , H02M2001/0058 , H02M2007/4818 , Y02B70/1433 , Y02B70/1441 , Y02B70/1491
摘要： A resonant switching power system operates with two resonant frequencies. A first frequency depends on the secondary leakage inductance of an output transformer and capacitor. The first frequency varies with changes in the load because load changes alter the leakage inductance. A second resonant frequency depends on the gate source capacitance of two MOSFET power devices in the circuit and the leakage inductance of the circuit's driving transformer. Power is thereby supplied that is always in phase with the load so that switching in the power supply occurs when current is near zero. High thermal efficiency is thereby achieved.
摘要翻译：谐振开关电源系统以两个谐振频率工作。第一个频率取决于输出变压器和电容器的二次漏电感。第一个频率随负载变化而变化，因为负载变化会改变漏电感。第二谐振频率取决于电路中两个MOSFET功率器件的栅极电源电容和电路驱动变压器的漏电感。由此提供与负载始终相位的功率，使得当电流接近零时，电源的切换发生。由此实现高热效率。

4. 发明授权

US07206563B1 Reduction of radio frequency interference (RFI) produced by switching amplifiers 有权
标题翻译：降低开关放大器产生的射频干扰（RFI）
公开(公告)号：US07206563B1
公开(公告)日：2007-04-17
申请号：US10826732
申请日：2004-04-16
申请人： Michael S. Danielson , Michael W. Determan
发明人： Michael S. Danielson , Michael W. Determan
IPC分类号： H04B1/10
CPC分类号： H04B1/1027
摘要： Apparatus and methods for reducing radio frequency interference produced by switching amplifiers, includes a variable-order noise shaper in a system that includes an AM tuner. An alternative implementation involves determining the tuned frequency of a radio signal. A first sampling rate is provided at which the radio signal is to be sampled. The first sampling rate is associated with a plurality of first harmonic frequencies. A second sampling rate is also provided and is associated with a plurality of second harmonic frequencies different than the first harmonic frequencies. The method involves selectively sampling the radio signal at one of the first and second sampling rates, wherein the first sampling rate is selected when the first harmonic frequencies do not coincide with the tuned frequency, and the second sampling rate is selected when the second harmonic frequencies do not coincide with the tuned frequency. A still further alternative implementation for reducing RFI involves the second sampling rate being derived using linear interpolation.
摘要翻译：用于降低由开关放大器产生的射频干扰的装置和方法包括在包括AM调谐器的系统中的可变阶噪声整形器。一种替代实现包括确定无线电信号的调谐频率。提供对无线电信号进行采样的第一采样率。第一采样率与多个第一谐波频率相关联。还提供了第二采样率并且与不同于第一谐波频率的多个二次谐波频率相关联。该方法包括以第一和第二采样率中的一个选择性地对无线电信号进行采样，其中当第一谐波频率与调谐频率不一致时选择第一采样速率，并且当第二谐波频率不符合调谐频率。用于减少RFI的另一替代实施方式涉及使用线性内插导出的第二采样率。

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