ECL circuits typically have relatively small logic spans of approximately 800 mV. Because of the small span, to drive TTL circuits from ECL levels normally entails the use of level converters, such as the MC10125, or comparators. Such circuits are re…
AC signals can emanate from many sources, and many of these sources are incompatible with the most popular interface voltages, such as TTL. A temptation always exists to capacitively couple the ac signals because capacitive coupling strips off the dc…
public class ControllerActionInvoker : ResourceInvoker, IActionInvoker 我们知道,ControllerActionInvoker实现了IActionInvoker接口.然而却找不到InvokeAsync的方法实现.检查以后发现,它把实现放到了抽象类ResourceInvoker中了.那好吧,我们先来看看这个ResourceInvoker. public virtual async Task InvokeAsync() { tr…
Link: http://www.essentialsql.com/what-is-a-database-trigger/ Copy... What is a Database Trigger? A database trigger is special stored procedure that is run when specific actions occur within a database. Most triggers are defined to run when changes…
Introduction ------------ This document lists the order in which triggers fire in Oracle Forms 4.5: o The first column, Action, describes the function to be performed (e.g. deleting a record). o The second column, Trigger Firing Order, describe…
Linear Technology's recently introduced LTC4300 chip buffers I2C clock and data lines to and from a hot-swappable card. This task is difficult because the IC must work bidirectionally, meaning that you can simultaneously and actively drive both sides…
The achievable accuracy for systems with multiple ADCs depends directly on the reference voltages applied to the ADCs. Medical-ultrasound-imaging systems, for example, commonly include a large number of ADCs in the system's beam-former electronics, w…
This Design Idea explores level-shifting an I2C bus from 5V/ground (positive domain) to ground/–5V (negative domain). In multisupply systems, you sometimes face a situation in which digital information stored in logic circuits running from 5V to grou…
In multiple-output power supplies in which a single supply powers circuitry of vastly different current draws, two perplexing steps are sensing the current that each output draws and deactivating the power supply in the event of an overload on that o…
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…
This C++ example shows how to create a task that is scheduled to execute Notepad when a user logs on. The task contains a logon trigger that specifies a start boundary for the task to start and a user identifier that specifies the user. The task is r…
功能:备份存储过程,视图,函数触发器,Sequence序列号等准备工作:--1.创建文件夹 :'E:/OracleBackUp/ProcBack';--文本存放的路径--2.执行:create or replace directory MyProcBakPath as 'E:/OracleBackUp/ProcBack';--3.赋权限:sqlplus /nologconn user/pswd as sysdbagrant select on DBA_OBJECTS to user;--4.创建…
触发器(trigger):监视某种情况,并触发某种操作. 触发器创建语法四要素:1.监视地点(table) 2.监视事件(insert/update/delete) 3.触发时间(after/before) 4.触发事件(insert/update/delete) 语法: create trigger triggerName after/before insert/update/delete on 表名 for each row #这句话在mysql是固定的 begin sql语句; end…
