公开(公告)号：US06892103B1

公开(公告)日：2005-05-10

申请号：US09408095

申请日：1999-09-27

申请人： Rustin W. Allred ,  Robert S. Young, Jr. ,  Michael J. Tsecouras

发明人： Rustin W. Allred ,  Robert S. Young, Jr. ,  Michael J. Tsecouras

IPC分类号： H03G5/00

CPC分类号： H03G5/005

摘要： Digital audio tone control implemented using Shelving filters for the digital audio treble tone control exhibits artifacts (noise, distortion, etc.) as the tone control settings are changed. This was previously accomplished by changing filter coefficients in the traditional small equal (on a dB scale) filter steps of a fraction of 1 dB. While this worked for bass filters, artifacts were still present for treble. This invention eliminates these artifacts by changing the filter steps to small equal steps on a linear scale. Additionally, where the steps became too large for the resolution required, additional filter steps are added. Approximately 150 filter steps are used for treble control and 128 filter steps are used for bass tone control. An efficient way of implementing the filter steps for digital tone control stores (119) one set of filter coefficient values and a small amount of additional information and then increments the coefficients between all the other steps. This reduces the memory required by as much as 95% or the machine cycles for implementing filter coefficients by 40-200 times. This new efficient method is accomplished by: 1) defining the filter coefficients, 2) piecewise linearizing the plot of filter coefficients versus filter step to define the linear regions, 3) defining the initial set of filter coefficients, and 4) defining increments between the filter steps.

摘要翻译： 数字音频音调控制使用数字音频高音音调控制的搁架滤波器，随着音调控制设置的改变，会出现伪像（噪音，失真等）。 以前通过改变传统的等于（在dB尺度上）小于1dB的滤波器步长的滤波器系数来实现。 虽然这对低音滤波器有效，但仍然存在高音的文物。 本发明通过将滤波器步骤改变为在线性尺度上的小的相等步骤来消除这些伪影。 此外，如果步骤变得太大以致于需要解析，则会添加额外的过滤器步骤。 大约150个滤波器步骤用于高音控制，128个滤波器步骤用于低音控制。 实现数字音调控制存储器（119）的滤波器步骤的一种有效方法是一组滤波器系数值和少量附加信息，然后在所有其它步骤之间增加系数。 这将所需的存储量减少了95％，或者将滤波器系数实现40-200次的机器周期。 这种新的有效方法是通过以下方式实现的：1）定义滤波器系数，2）将滤波器系数的曲线与滤波器步长分段线性化以定义线性区域，3）定义初始滤波器系数集合，以及4） 过滤步骤

公开(公告)号：US06456127B1

公开(公告)日：2002-09-24

申请号：US09934102

申请日：2001-08-21

申请人： Michael J. Tsecouras

发明人： Michael J. Tsecouras

IPC分类号： H03K448

CPC分类号： H03K3/0231 ,  H03F3/217 ,  H03K4/066

摘要： A system and method of integrating switching amplifiers into systems with low amplitude front-end tuners to eliminate shielding and EMI filtering associated with signals, power and ground. An adaptive frequency programmable pulse frame rate switching amplifier scheme using either look-up tables or appropriate algorithms, ensures by design, the elimination of critical interference frequency generation.

摘要翻译： 将开关放大器集成到具有低振幅前端调谐器的系统中的系统和方法，以消除与信号，电源和接地相关的屏蔽和EMI滤波。 使用查找表或适当算法的自适应频率可编程脉冲帧率切换放大器方案通过设计确保消除关键干扰频率产生。

公开(公告)号：US5859563A

公开(公告)日：1999-01-12

申请号：US800913

申请日：1997-02-13

申请人： Henry Tin-Hang Yung ,  Steve Wiyi Yang ,  Michael J. Tsecouras

发明人： Henry Tin-Hang Yung ,  Steve Wiyi Yang ,  Michael J. Tsecouras

IPC分类号： G05F1/46 ,  G05F1/10

CPC分类号： G05F1/46

摘要： A voltage reference circuit includes: an amplifier A1 with low open loop output impedance, an output of the amplifier is coupled to a first input of the amplifier A1; and a first resistor R1 coupled between the output of the amplifier A1 and a reference node 30, the first resistor R1 has a resistance substantially equally to the low open loop output impedance, whereby a low frequency impedance at the reference node 30 is substantially equal to the resistance.

摘要翻译： 电压参考电路包括：具有低开环输出阻抗的放大器A1，放大器的输出耦合到放大器A1的第一输入端; 以及耦合在放大器A1的输出端和参考节点30之间的第一电阻器R1，第一电阻器R1具有与低开路输出阻抗基本相等的电阻，由此在参考节点30处的低频阻抗基本上等于 阻力。