Jun 30, 2012

If the frequency was high enough, the capacitor in the tank would draw too much current from the output of the amplifier, and the amplifier would overload killing its gain and bringing the whole system down…

Tags: electronics

Jun 4, 2012

After all the awful places I’ve been to (Chennai tops that list), Nagercoil is quite a heavenly place. The road to Kanyakumari had good tree cover with the occasional pond and other water bodies providing good relief to the surroundings.

Tags: walk, travel

May 12, 2012

If you are into oscillator theory, you probably know that oscillations in an oscillator build up exponentially before hitting power supply saturation and stabilizing. Well, at least that is what the textbooks and the equations claim. But, have you ever seen it? :-)

Tags: electronics

Apr 29, 2012

A few common and silly mistakes people might make when they are learning to use a multimeter to measure resistances…

Tags: electronics

Apr 26, 2012

The plans ahead involve running my own server on a BeagleBoard with solar power. But the BeagleBoard plans are pretty long term (possibly more than a year)…

Tags: selfhosting

Mar 26, 2012

“Convolution in the time domain is multiplication in the frequency domain” is an oft-quoted statement. But the exact relation between the two is seldom stressed adequately. Mathematically, convolution and polynomial multiplication are one and the same process, as I shall explain shortly.

Tags: math, signals

Mar 26, 2012

The process of convolution works on the twin concepts of linearity and shift invariance. Here is an animated explanation of the concept.

Tags: math, signals

Mar 26, 2012

Modular exponentiation is essentially a technique used to calculate c=b

Tags: math

Mar 26, 2012

Polynomials are numbers of an unknown base x…

Tags: math

Mar 26, 2012

This is based on my dissatisfaction with the messed up way time and work problems are handled in quantitative aptitude examination guides. They take a simple idea, threaten you with time constraints and leave you feeling broken and guilty because you couldn’t solve them quickly enough.

Tags: math

Mar 26, 2012

A derivation of the mathematical expression for the throughput of an aloha network using the exponential and Poisson random distributions

Tags: math

Mar 26, 2012

At school, we are taught that parallel rays incident on the mirror, after reflection, pass through the focus of the mirror, and that irrespective of the position of these parallel rays, the position of the focus does not change. But that is not quite true. It is just an approximation.

Tags: antenna, physics

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