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analog circuit which consist digital device..like micro processor,controller are called like that..if want to work in that area. u have to study the electronic component, and there functions..
As one example, some super-accurate references have an
elaborate digital cal-map with temparature sensor and do
a multi-point correction scheme. It's just another switch
based trim, only more elaborate. There are digital control
loops for DC-DCs. To me this is all just "this year's buzz
word" for the general idea of mixed signal. If you are able
to deal with both ends and the middle, you can pick up
whatever jargon and point tools are required. Of course
getting hired probably means inserting that jargon into
your electronic resume so as to get past the filter-bots.
I suspect that if you entered thar phrase into Google
you would have some answers too. Try it.
Ok I would like to ask one more question .Which field has more better job opportunities? Analog and mixed signal IC design or RF circuit level designing?
Ok I would like to ask one more question .Which field has more better job opportunities? Analog and mixed signal IC design or RF circuit level designing?
Job opportunities not depends on platforms..it depends on what is your interest and which way you want to choose , Both are very interesting and have good opportunities.
I hope you got .what i mean to say....
Regards
Praveen Bhat.
Opportunities in either direction, seek suitable talent. My
advice to you is, get some exposure to both and see which
one suits your interests and abilities better. Because this
will determine whether, or how far you develop the real skill
that defines you as someone who opportunity will seek out.
Nobody expects college to produce a useful designer, only
a trainable one. And we look for interest and curiosity and
initiative, more than a list of places you sat.
Many IC design these days are mixed signal designs. Usually the work is separated to highly digital sections and primarily analog section with engineers specialized in each category. Each speciality group has to have some knowledge of other dissipline.
Power management is another area that is becoming a speciality dissipline.
The best and most talented engineers rise to system design managers which manage the overall floorplan and referee between the dissiplines.
My understanding is that digital assisted analog is a little different from mixed-signal design. Or you may say the former is an extension of the latter. Usually a mixed-signal design just means you put digital and analog functions on the same chip. But in a digital assisted analog design, the digital part is actually helping the analog part to work properly. One example is digital calibration. In advanced technologies, the process variation is a big problem. Of course you can always use large transistors and over design the circuits, but that will incur prohibitive power and area overhead. So one thing you may do is to use some digital circuits to monitor the performance of the analog part and correct any non-idealities. Data converters, oscillators, references can all benefit from this technique.
My understanding is that digital assisted analog is a little different from mixed-signal design. Or you may say the former is an extension of the latter. Usually a mixed-signal design just means you put digital and analog functions on the same chip. But in a digital assisted analog design, the digital part is actually helping the analog part to work properly. One example is digital calibration. In advanced technologies, the process variation is a big problem. Of course you can always use large transistors and over design the circuits, but that will incur prohibitive power and area overhead. So one thing you may do is to use some digital circuits to monitor the performance of the analog part and correct any non-idealities. Data converters, oscillators, references can all benefit from this technique.
What if the digital circuit itself is not so ideal or it has its non-ideal behavior in itself? because it will be implemented on the same chip.
Secondly, i have studied some papers such as the Digitally assisted analog circuits by Dr Boris Murmann. He has implemented many prototypes regarding ADCs which are digitally assisted but he does not specify that how do the temperature variations and voltage variations taken care of? Because what he does is that he remove the closed loops of the gain stages inside the ADC which reduce the power consumption but what about the input voltage variations and temperature variations?
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