Understanding Transistor Cross Reference
Posted on 16. Jul, 2011 by Admin.
All electronic repairers should know how to read the transistor cross reference equivalent book if they want to succeed in electronic repairs. The data sheet is very important for every engineers and technicians because it can help them to find the nearest replacement for the components that they are searching such as the transistor, scr, mosfet, ic, diode and other components.
The famous transistor cross reference book is the Philip ECG semiconductor master replacement guide. In the content you can find all kind of electronic components specification and ic schematic too. It is one of the must ‘have’ semiconductor guide for those who love electronic troubleshooting. The internal diagram or layout of ic is clearly drawn and the transistor parameters were also listed in this book. The price of this guide is not expensive and as an electronic repairer you should buy one. Just imagine without this book, you will be facing difficulty finding the right component for substitution. [...]
Continue Reading
SCR Component Analyzer – A Preferred Test Methods
Posted on 15. Jul, 2011 by Admin.
The term SCR stands for Silicon Controlled Rectifier. These three terminal devices can be tested by a number of different methods. The more common methods utilize a DVM (Digital Volt Meter) or an Analog Meter. Usually the SCR is tested by simply looking for the lack of conduction between Anode and Cathode leads. A high resistance would indicate a functional device, given the limitations of not gating the device.
Another method that is used in some Repair Centers involves a Test lamp, a battery and a few Test leads. The lamp and battery are connected in Series then placed across the SCR’s Anode and Cathode leads (the negative lead of the battery connects to the SCR’s Cathode lead). A flying test lead is then used to trigger the SCR by momentarily connecting the positive terminal of the battery to the SCR’s gate lead. [...]
Continue Reading
Basics of Manufacturing Printed Circuit Boards
Posted on 14. Jul, 2011 by Admin.
In electronics, printed circuit boards, or PCBs, are used to mechanically support electronic components which have their connection leads soldered onto copper pads in surface mount applications or through rilled holes in the board and copper pads for soldering the component leads in thru-hole applications. A board design may have all thru-hole components on the top or component side, a mix of thru-hole and surface mount on the top side only, a mix of thru-hole and surface mount components on the top side and surface mount components on the bottom or circuit side, or surface mount components on the top and bottom sides of the board. [...]
Continue Reading
Integrated Circuit Design Flow
Posted on 13. Jul, 2011 by Admin.
The process of chip design is very complex and its understanding requires many years of study and practical experience. From a digital integrated circuit design perspective, it could be divided into different hierarchies or stages where the problems are examined at several different levels: system design, logic design, circuit design, layout design, fabrication and testing. These steps are not necessarily sequential; interactions are done in practice to get things right. [...]
Continue Reading
Integrated Circuits or IC
Posted on 12. Jul, 2011 by Admin.
Integrated circuit, also known as IC, chip, or microchip, is a miniature electronic circuit which was manufactured on the surface of a thin semiconductor material. It is used in almost all the useful electronic equipment nowadays such as computers, microwaves, phones, and other digital appliances. It can be divided into digital, analog and mixed signal. Digital chips are small in size, fast speed, low power loss, and cut the cost. Analog ICs can ease the burden on circuit design because they are working by processing continuous signals. Mixed signal combine digital and analog circuit on a single chip to perform functions well, such kind are smaller in size, lower cost, but must carefully account for signal interference. [...]