Integrated Circuit Intro

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Integrated Circuit Intro

1.Noise Margin 不管是TTL还是CMOS Logic Level,都会有门限.如,5V CMOS的VoutH > 4.4V, VoutL <0.33V;而它对应的输入电平VinH >3.5 , VinL <1.5V.所以,这里5V COMS的noise margin为VnH=4.4-3.5=0.9V. 为什么要有Noise Margin?因为信号在传输的时候会有噪音引入,同时,肯能会因为线路阻抗的不匹配而有发射信号在传输线上回荡.原本4.4V的高电平,加些乱七八糟的信…

PatentTips - Integrated circuit well bias circuitry

1. Field of the Invention This invention relates in general to an integrated circuit and more specifically to well biasing circuitry for transistors of an integrated circuit. 2. Description of the Related Art Integrated circuits utilize transistors,…

Input/output subsystem having an integrated advanced programmable interrupt controller for use in a personal computer

A computer system is described having one or more host processors, a host chipset and an input/output (I/O) subsystem. The host processors are connected to the host chipset by a host bus. The host chipset is connected to the input/output subsystem by…

PatentTips - Well bias control circuit

BACKGROUND OF THE INVENTION The present invention relates to a semiconductor integrated circuit device having a PN Vt balance compensation circuit for compensating a threshold voltage difference between a PMOS transistor and an NMOS transistor and ca…

Fedora 22中的日期和时间配置

Introduction Modern operating systems distinguish between the following two types of clocks: A real-time clock (RTC), commonly referred to as a hardware clock, (typically an integrated circuit on the system board) that is completely independent of th…

网络基础 : OSI参考模型

Overview OSI规范的作用之一就是帮助在不同的主机之间传输数据. OSI模型包含7层,它们分为两组. 上面3层指定了终端中的应用程序如何彼此通信以及如何与用户交流: 下面4层指定了如何进行端到端的数据传输. 上三层对联网和网络地址一无所知,那是下面4层的职责. 下面4层定义了数据是如何通过物理电缆.交换机和路由器进行传输的,它们还定义了如何重建从发送方主机到目标主机的应用程序的数据流. 下面的网络设备都运行在OSI模型的全部7层上: NMS(Network Management Stat…