How to Model a Frequency Modulated (FM) Signal – an insight

03/12/2011

Both frequency and phase modulation are important not only in electronics but also in science and physics in general. It seems like a trivial chore but when I first tried to model such a signal some time back I hit a hard wall. Our minds easily understand kinematics concepts such as coordinate, speed, acceleration and the relations between them in real life situations, but phase, frequency and angular acceleration are…

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How to Model a Phase-Locked Loop (PLL) in Excel – part#2

03/11/2011

This is a continuation of the PLL series of tutorials and it starts by implementing and testing the low pass filter created in the previous section. After that, the block diagram is updated and the presentation begins to show how to build the PLL model in a worksheet using the existing LPF formulas. [sociallocker][/sociallocker]

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How to Model a Phase-Locked Loop (PLL) in Excel – part#1

03/09/2011

A Phase-Locked Loop is a type of electronic circuit. It generates an oscillation with the same frequency as a reference oscillation and a relatively constant phase difference  with respect to the same reference. The applications spectrum of such a circuit are extremely wide. Signal modulation, demodulation, detection and filtering, frequency conversion and synthesis are just a fraction of what this circuit can do. Though very simple, it is often not enough understood in industry by…

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RLC-Parallel

11/28/2010

This RLC parallel circuit model has several sound effects so it must be dearchived in the same subdirectory. [sociallocker][/sociallocker]

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Introduction to Numerical Methods – Basic Filters #2

11/09/2010

This post shows the steps for building a first model of a single pole RC high pass filter (HPF) in Excel based on numerical solution using the finite difference method. It is quite elemetary to undersand, try to go through the proof regardless of your background. [sociallocker][/sociallocker]

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Introduction to Numerical Methods – Basic Filters #1

10/22/2010

This post shows the steps for building a first model of a single pole RC low pass filter (LPF) in Excel based on numerical solution using the finite difference method. It is quite elemetary to undersand, try to go through the proof regardless of your background. [sociallocker][/sociallocker]

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Dynamic Lissajous Emulator

10/01/2010

This is a dynamic Lissajous emulator in the sense that the waveform is obtained by combining 2 time varying sinusoidal waves with different frequencies. [sociallocker][/sociallocker]

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Static Lissajous Emulators (2D and 3D)

09/29/2010

This is a static Lissajous emulator in the sense that the waveform is obtained by combining 2 static sinusoidal waves with different frequencies. As a paranthesis, I will be preparing a dynamic version which will look just like the wave shape seen on a real oscilloscope. The file presented here has two different worksheets, the first one contains a classic 2D Lissajous figure and the second one has a 3D Lissajous pattern obtained from three different…

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