公开(公告)号：US07197299B2

公开(公告)日：2007-03-27

申请号：US10752630

申请日：2004-01-07

申请人： Geoffrey B. Jackson ,  Saleel V. Awsare ,  Lawrence D. Engh ,  Peter Holzmann ,  Oliver C. Kao ,  Carl R. Palmer ,  Aditya Raina

发明人： Geoffrey B. Jackson ,  Saleel V. Awsare ,  Lawrence D. Engh ,  Peter Holzmann ,  Oliver C. Kao ,  Carl R. Palmer ,  Aditya Raina

IPC分类号： H04Q7/22 ,  H04B1/28

CPC分类号： H04M1/725 ,  G11C27/005 ,  H04M1/6041 ,  H04M1/6505

摘要： A multilevel analog recording and playback system is described. The analog recording and playback system provides a variety of analog processing functions to enhance system level integration. The analog recording and playback system is an fully configurable integrated device that includes a plurality of signal paths, a microphone automatic gain control (“AGC”) circuit, volume control and filtering circuit, speaker driver circuit, gain selectable analog input, auxiliary input and output paths, configurable summation amplifiers having mixing features, multilevel analog memory storage array, and user selectable programming duration.

摘要翻译： 描述了多级模拟录音和播放系统。 模拟录音和回放系统提供了各种模拟处理功能，以增强系统级集成度。 模拟录音和回放系统是一个完全可配置的集成设备，包括多个信号路径，麦克风自动增益控制（“AGC”）电路，音量控制和滤波电路，扬声器驱动电路，增益可选模拟输入，辅助输入和 输出路径，具有混合特征的可配置求和放大器，多级模拟存储器存储阵列和用户可选择的编程持续时间。

公开(公告)号：US06865186B1

公开(公告)日：2005-03-08

申请号：US09501699

申请日：2000-02-10

申请人： Geoffrey B. Jackson ,  Saleel V. Awsare ,  Ming-Bing Chang ,  Peter Holzmann ,  Oliver Chihkuang Kao ,  Hung-Chuan Pai ,  Carl R. Palmer ,  Aditya Raina

发明人： Geoffrey B. Jackson ,  Saleel V. Awsare ,  Ming-Bing Chang ,  Peter Holzmann ,  Oliver Chihkuang Kao ,  Hung-Chuan Pai ,  Carl R. Palmer ,  Aditya Raina

IPC分类号： G06F12/00 ,  G11C7/16 ,  G11C11/56 ,  G11C27/00 ,  H04L12/28

CPC分类号： G11C27/005 ,  G11C7/16 ,  G11C11/5621 ,  G11C2207/16

摘要： A multilevel analog recording and playback system is described. An analog processing circuit processes analog data. A storage circuit includes a non-volatile memory array, a switching circuit, and a communication interface. The non-volatile memory array stores analog and digital data. The switching circuit transfers the analog and digital data to and from the memory array. The communication interface allows a processor to exchange information with the device.

摘要翻译： 描述了多级模拟录音和播放系统。 模拟处理电路处理模拟数据。 存储电路包括非易失性存储器阵列，开关电路和通信接口。 非易失性存储器阵列存储模拟和数字数据。 开关电路将模拟和数字数据传送到存储器阵列和从存储器阵列传送。 通信接口允许处理器与设备交换信息。

公开(公告)号：US06348842B1

公开(公告)日：2002-02-19

申请号：US09696564

申请日：2000-10-25

申请人： Aditya Raina ,  Peter J. Holzmann ,  Geoffrey B. Jackson ,  Saleel V. Awsare

发明人： Aditya Raina ,  Peter J. Holzmann ,  Geoffrey B. Jackson ,  Saleel V. Awsare

IPC分类号： H03L102

CPC分类号： H04B1/0003 ,  H03B5/04 ,  H03K3/0231 ,  H03L1/026 ,  H04B1/40

摘要： An apparatus and method for achieving accurate temperature-invariant sampling frequencies in a device, such as, a multiple message non-volatile multilevel analog signal recording and playback system is described. An oscillator is used to generate an oscillation frequency. A bandgap voltage generator generates a zero temperature coefficient voltage reference (V(OTC)) that is independent of temperature. This V(OTC) is applied to the oscillator. A variable temperature coefficient voltage (V(TC)) that compensates for temperature coefficient variations of a resistor to which V(TC) is applied produces a stable oscillator current Iosc. Therefore, the stable oscillator current Iosc is likewise independent of the temperature coefficient variations of the resistor. The stable oscillator current Iosc is applied to the oscillator such that the oscillator generates a stable temperature-invariant oscillation frequency. A digital divider is used to digitally divide the stable oscillation frequency by a predetermined amount to produce an accurate temperature-invariant sampling frequency. A filter is then used to filter incoming signals utilizing a filter cutoff that tracks the sampling frequency.

摘要翻译： 描述了一种用于在诸如多消息非易失性多电平模拟信号记录和回放系统的装置中实现精确的温度不变采样频率的装置和方法。 振荡器用于产生振荡频率。 带隙电压发生器产生与温度无关的零温度系数电压基准（V（OTC））。 该V（OTC）应用于振荡器。 补偿施加V（TC）的电阻器的温度系数变化的可变温度系数电压（V（TC））产生稳定的振荡器电流Iosc。 因此，稳定的振荡器电流Iosc同样独立于电阻器的温度系数变化。 稳定振荡器电流Iosc被​​施加到振荡器，使得振荡器产生稳定的温度不变振荡频率。 使用数字分频器将稳定振荡频率数字地分频预定量以产生精确的温度不变采样频率。 然后使用滤波器来利用跟踪采样频率的滤波器截止来滤波输入信号。