公开(公告)号：US06407611B1

公开(公告)日：2002-06-18

申请号：US09382298

申请日：1999-08-24

申请人： Frode Larsen ,  Sam Olu George

发明人： Frode Larsen ,  Sam Olu George

IPC分类号： G06G712

CPC分类号： H01L22/20

摘要： A system and method for providing automatic compensation of IC design parameters that vary as a result of natural process variation is disclosed. In a simplified embodiment, the difference in voltages, &Dgr;VGS, between two identical diode-connected MOSFETs, which are biased with currents that are known to be different in value, is determined. &Dgr;VGS, is inversely proportional to the transconductance of the first of the two diode-connected MOSFETs, which is also biased with a current, ID. A relationship that embodies a direct proportionality between the transconductance of the first diode-connected MOSFET and a circuit performance parameter is derived, thereby establishing a relationship between &Dgr;VGS and the circuit performance parameter. Process compensation is then implemented, comparing known reference voltages with &Dgr;VGS. The outputs of the comparison are latched into digital decoding logic which provides coarse steering (process compensation) current to a functional circuit, thereby centering the circuit with respect to process.

摘要翻译： 公开了一种用于提供由于自然过程变化而变化的IC设计参数的自动补偿的系统和方法。 在一个简化的实施例中，确定了两个相同的二极管连接的MOSFET之间的电压差（DELTAVGS），其被已知的具有不同值的电流偏置。 DELTAVGS与两个二极管连接的MOSFET中的第一个MOSFET的跨导成反比，其也被电流ID偏置。 导出体现第一二极管连接的MOSFET的跨导与电路性能参数之间的直接比例关系，从而建立DELTAVGS与电路性能参数之间的关系。 然后实现过程补偿，将已知参考电压与DELTAVGS进行比较。 比较的输出被锁存到数字解码逻辑中，其向功能电路提供粗略的转向（过程补偿）电流，从而使电路相对于过程居中。

公开(公告)号：US06281829B1

公开(公告)日：2001-08-28

申请号：US09384672

申请日：1999-08-27

申请人： Daniel Amrany ,  Arnold Muralt ,  Frode Larsen ,  Sam Olu George ,  Nianxiong Tan ,  Min Shen ,  Peter D. Keller ,  Jung-Lung Lin

发明人： Daniel Amrany ,  Arnold Muralt ,  Frode Larsen ,  Sam Olu George ,  Nianxiong Tan ,  Min Shen ,  Peter D. Keller ,  Jung-Lung Lin

IPC分类号： H03M100

CPC分类号： H04L27/0002

摘要： In general, the multi-mode analog front-end provides an internal line driver and hybrid, as well as numerous functions, in order to provide a close to optimum solution for all digital subscriber line applications. The functions provided for by the analog front-end include; programmable hybrid attenuation; onboard amplifiers for driving external transmit and receive filters; a line driver with programmable drive and gain; programmable RC-filters capable of calibration via an internal loop-back under digital control; a programmable switched-capacitor filter for tracking the over sampling rate used by a digital signal processor; internal testing functions; a high frequency boost circuit; a dual input peak detector; selectable data rates; and a programmable data interface. The analog front-end allows for use of particular blocks within the analog front-end particular to the functions necessary to compensate for a particular digital subscriber line application.

摘要翻译： 通常，多模式模拟前端提供内部线路驱动器和混合动力以及许多功能，以便为所有数字用户线路应用提供接近最佳的解决方案。 模拟前端提供的功能包括： 可编程混合衰减; 用于驱动外部发送和接收滤波器的板载放大器; 具有可编程驱动和增益的线驱动器; 可编程RC滤波器，可在数字控制下通过内部回路进行校准; 用于跟踪由数字信号处理器使用的过采样率的可编程开关电容滤波器; 内部测试功能; 高频升压电路; 双输入峰值检测器; 可选数据速率; 和可编程数据接口。 模拟前端允许使用模拟前端中的特定块，特别是补偿特定数字用户线应用所需的功能。