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  1. #1
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    Why we need analog design and what it is used for?

    hello all

    i want to know what an analog designer do

    almost all our life now is digital .digital systems are everywhere

    so why we need analog design and what it is used for

    thanks

    •   Alt21st April 2007, 17:21

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    Re: Why analog

    The physical signals in everyday life are all analog. Computers use digital signals and processing methods. Before and after digital signal processing, we should use analog signals and processing methods. Due to the advantages of digital signal processing compared to the analog signal processing, DSPs are dominantly used rather than ASPs. But, analog designs are usually simpler and smaller than the corresponding digital designs.



    •   Alt21st April 2007, 18:10

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    Why analog

    "But, analog designs are usually simpler and smaller than the corresponding digital designs."

    IS this justified

    for learning the complexness of anlog devices go to www.national.com or analog devices's site.
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    •   Alt22nd April 2007, 05:39

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    Re: Why analog

    Hi, nikhilele.

    Normally, it takes about one or more years to train for digital design engineers, and more than three yeays for analog design engineers. More circuit techniques are required for analog design engineers, and more system-oriented technologies are required for digital design engineers. But, how about the results of multiplier or divider implemented for analog signals and digital signals? I think analog multiplier is more compact and smaller than digitan multiplier, which can be used in a AM modulator or demodulator.



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    Re: Why analog

    Well you have to use ADCs and DACs (mixed-signal circuits) in circuits that interface with real life signals...you also have to use analog Amplifiers (and more specific types of amplifiers like the LNAs - Low Noise Amplifiers).....then there are analog filters (digital filters can't work at very high frequencies, b/c we don't have ADC/DACs available that can operate at such high frequencies)

    Also most of the communication electronics work is based on Analog circuits....b/c you can't directly transmit digital signals from an antenna without modulation....

    thus most of the design work concerned if you're designing ADCs, DACs, amplifiers, LNAs, filters, modulators, demodulators, mixers is based on Analog circuits....

    Analog designers are much lesser in number than digital designers....b/c analog design is much more difficult...there are many more parameters to take into consideration while doing analog design as opposed to digital designs....that's why they also get paid higher!

    Whereas digital designer's work is a lot easier...that has been made even more easy b/c of the evolution of so many tools geared towards the digital designer...you can design complete Microprocessors in an HDL like Verilog and burn it on an FPGA chip or give the computer generated layout to an IC fab....while this type of tools have not been developed for analog design...



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    Why analog

    I think the real world we live in is actually analog and continuous, unless you go to such a microscale where the quantum effects are dominant.



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    Re: Why analog

    yes all things are coming to digital...and about analog designs it's because of that our technology isn't high enough to change that analog designs to digital



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