NID Convocation 2009 Display,Ahmedabad

I had been to NID,Ahmedabad,this Saturday and Sunday [12th and 13th Dec 2009]. I was stunned by the creation of the students . Enormous amount of creative stuffs were Displayed ,i can’t say about others ,but i could never have completed seeing the exhibits. In this blog i will try to express what i felt about the event as an electronics engineering student , a not-so-art-loving person.
Guess What ? ” I would still suggest one to go for this event “.

What was so Special about it?
General perception about Design Exhibition is that , there will be some mosaic painting ,some modern art, some
sculptures which need someone to explain , some clothes and fabrics [which are mostly worn by models in the fashion shows].

This was Darkness , i will throw some light on what actually look for there and surely these are no the only things displayed there.

there are many categories under which the creations are displayed, Automobile design ,Product and packaging design ,media design ,computer interface and communication designs, business planning,and many more.

more on this coming soon..

DTMF Tones Info

DID YOU KNOW ?
Tone Duration = 40ms
Tone Pause = 40ms

DID YOU KNOW ?
A normal DTMF detector uses a 9th order bandpass Filter

What is the Difference Between Vcc, Vdd,Vss,Vee?

Common supply terms has been blurred by the interchangeable application of TTL and CMOS logic families

But, the Fact is ,

Vcc and Vee are the terms used for Transistors .
Vdd and Vss are the terms used for FET’s

And in terms of supply voltages :
Vcc and Vdd is for positive supply.
Vee and Vss is for negetive supply.

Apparently this terminology originated in some way from the terminals of each type (i.e., Vcc is often applied to BJT collectors, Vee to BJT emitters, Vdd to FET drains, and Vss to FET sources). This notation then carries across to integrated circuits — TTL ICs were originally based on BJT technology, and so often use the Vcc / Vee terminology;

CMOS ICs are based on FET technology, and so often use the Vdd / Vss terminology.

Switched Capacitor Filters

This a modern design for Filters used in the IC fabrication as they donot require “Resistors”.

Why Switched capacitor filters ?
Basically,
1) The problem with the resistors is that they take up a lot of room in the IC ,
2) Precision is enhanced ,as two capacitors are compared, hence the manufacturing errors are somewhat masked.
so this alternative has been taken up.

How does it work?
To understand how switched capacitor circuits work, consider the circuit shown with a capacitor connected to two switches and two different voltages.

Switched capacitor circuit

If S2 closes with S1 open, then S1 closes with switch S2 open, a charge (q is transferred from v2 to v1 with

If this switching process is repeated N times in a time (t, the amount of charge transferred per unit time is given by
.
Recognizing that the left hand side represents charge per unit time, or current, and the the number of cycles per unit time is the switching frequency (or clock frequency, fCLK) we can rewrite the equation as
.
Rearranging we get
,
which states that the switched capacitor is equivalent to a resistor. The value of this resistor decreases with increasing switching frequency or increasing capacitance, as either will increase the amount of charge transfered from v2 to v1 in a given time.

Where is it used ?
for the mean time, band-split filters and related applications

Some Ways Software Developers Learn Java

Today, many colleges and universities offer courses in programming for the Java platform. In addition, developers can also enhance their Java programming skills by reading Sun’s java.sun.com Web site, subscribing to Java technology-focused newsletters, using the Java Tutorial and the New to Java Programming Center, and signing up for Web, virtual, or instructor-led courses.

some real money by just registering domains

you can go to domainswhitepages.com etc sites and actually register domains for free..

Each birthday makes you a year older ..

still people cut cakes ..

have parties..

and enjoy..

is this a kind of “time is running out guys hurry up we have not yet enjoyed our share of life”

and for some its not …”it just good to be a year elder than to be a year older”

some who love taking responsibility have greater chance to be happy on this occasion..

Back To Basics:

birthdays were celebrated as a part of leisure day..among the rich people

it wasn’t a necessay day for the lower class people..

it was actually a time to take a break from the routine ..

it was  like a festival .

In India there being so many festivals already existing ..

only the rulers had their birthdays remembered and celebrated.

the time has changed .. Guess what??.