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Old 26th June 2010, 09:44 AM   #1
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Join Date: Jul 2009
Default Good Spice + Schematic Software

Hello Everyone

This beginner needs advice

I am on the prowl for a software that has both spice simulation and schematic drawing all combined as one family. So far I've been advised to get Eagle. But I see it doesn't do SPICE Simulations ( ) just schematic design drawing. However I see B2 Spice can be integrated with some versions of eagle.

But I would rather that one software had both integrated within in. So I need feedback.

P.S: If I am completely wrong about eagle, please correct me.
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Old 26th June 2010, 10:35 AM   #2
Did it Himself
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Location: Gloucestershire, England, UK
The TI website has a version of TINA which is free and I quite like it.
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Old 27th June 2010, 03:29 AM   #3
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Another question

Do all designers generally build there circuits on SPICE software? And how do they integrate the micro-controllers they are using into the SPICE software if they go digital?

I am just a soldering assembler where i work. The head engineers do design work and use Atmel Micro-controllers and use AVR Studios to program and compile into the micro-controller. But I don't understand how they then integrate that micro-controller into the full circuit which is then developed.

Somehow they go from AVR Studios to Eagle for PCB layout. I am completely missing the part where they actually do circuit simulation.

And I'm too nervous to ask them.
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Old 27th June 2010, 04:27 AM   #4
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Get LTspice from Linear Technology - Linear Home Page
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Old 27th June 2010, 06:15 AM   #5
jcx is offline jcx  United States
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its usually only really big projects or mixed signal integrated circuit development teams that can afford the extra engineers, pricey tools, time investment and get any benefit from full digital+analog simulation

in smaller mixed analog and digital circuit board level projects its common to just sim analog parts as separate pieces - maybe with "digital" sources - but with a fixed digital pattern waveform driving the analog circuit - not with a full simulation/emulation of the microprocessor and software

I find LTspice powerful enough that I haven't pushed for a integrated eda suite at work - sim analog sub circuits in LTspice, re-enter the schematic in the layout tool - the microprocessor circuitry never gets simmed - usually any significant programming effort takes several times longer than all of the analog circuit design/prototype/layout/debug steps combined

Last edited by jcx; 27th June 2010 at 06:33 AM.
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