Get much of electronics knowledge

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This is my first blog....Here you will be getting much of knowledge from internet .i.e. from best sites of electronics that probably people dont know till.

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Continuous Wave Radar

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  Assume  The E-field transmitted can be written as below The returned E-field at some time later is Time it took to travel to and from the object(target) is Substituting The received frequency can be calculated by taking time derivative of the quantity in red above and dividing by 2pi   Here,           The blue coloured quantity above is nothing but he Doppler shift frequency. Here the sign essentially indicates the target moving direction If the doppler shift is negative then the target is moving away from the radar and vice versa And thus the velocity can be written as
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Digital design fundamentals

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System Design Technologies There are four design technologies: Fixed-Function IC  Full Custom ASIC Semi Custom ASIC PLD Technology Fixed-Function IC In this type  the IC is designed for a fixed application. We call it as ASIC(Application Specific Integrated Circuit). Here the cost of making a single IC  is very much high. Also time to market is high. Full Custom ASIC A full custom ASIC is one where mostly all the blocks(logic blocks) are customized. A microprocessor is an example of Full custom ASIC. Semi Custom ASIC Here all the logic cells are predesigned and some(possibly all) the mask layers are customized. Using the predesigned cells in the library makes the design easy. PLD Technology Programmable logic devices are special ICs that are available in market in standard configurations. They can be configured to create a part customized to a specific application and hence belong to family of ASICS
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Frequency Modulated Continuous Wave Radar

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FMCW is a Radar which measures both speed and distance of the target object. In CW Radar only speed is measured while in FMCW both speed and distance is measured. This distance measurement is achieved by frequency modulated wave. There are different frequency modulation waveforms are used such as sawtooth, triangular, square, sine, and stepped modulation.  Amongst these Sawtooth and Traingular are most widely used to change the frequency of EM wave. How does it work??? updating...
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