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Re: Verilog A simulator
You can use Dolphin Integration's SMASH, which is a mixed-signal, mixed-language simulator. It is capable of working with VHDL-AMS and Verilog-A(MS).
Hi,
OTAs are faster, but limited in output swing, whereas an AOP (better call it OPA), has a second stage which serves as additional gain stage and larger output swing. Sometimes when you need to drive resistive loads with your amplifier, you need to make sure that the output resistance is...
Re: VHDL-AMS tool
to all of you who are trying to use smash - it is a hands-on tool. please go to open circuit ->smash_dir/examples/vhdl-ams (or whatever you want) and open an nsx file (this is the top netlist). now there appear two windows (nsx on the left and pattern file (for simulator...
Re: Smash vhdl-ams
your question is imo not exact enough. when you have already installed smash, then why the heck don't you just start one of the numerous examples?
there are by the vhdl-(ams), verilog-A(ms) possible in smash.
Subthreshold conduction occurs (the name says it) when Vgs < Vt. Then the MOSFET
behaves like a bipolar transistor. This effect occurs only when Vds is a few hundred mV.
So:
Id,subtr = I0*exp(Vgs/k*Vt), whereas k is a nonideality constant - depending on the process I guess.
design sigma delta adc
You can also use VHDL-AMS which is an IEEE standard in comparison to Verilog-A(MS), which is "only"
an Accelera standard (so no real standard). But like somebody has already said, it depends on your design tools.
architecture op-amp
You have to find out by any means what the load will be exactly. When it will be
a resistance, you may have to add a second stage. Folded cascode seems to be a good idea, but this architecture has a high impedance at the output, so the gain will break down strong.
Maybe...
I wonder why everybody here answers with books like Razavi. This is not a beginner book.
When someone wants to get familiar with analog design, he needs to know about pn junctions,
signal processing basics and basic electronics (E-fields, capacitors, network analysis etc...).
Furthermore...
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