## Online Solar Photovoltaic Calculator that Includes Local Solar Flux Received

This online tool allows you to estimate how much energy and power you can generate at a given location with photovoltaic solar panels. NREL's PVWatts Calculator   This section is regarding how you are treated by the electric utility company in Ohio  Frequently Asked Questions > "Renewable energies" Is Net-metering available Read more…

## Cadence: VCO Design Using SpectreRF

I was looking for a way I could plot the output frequency of a ring oscillator versus an input tuning voltage.   I did not find anything easy and fast in the literature but I think PSS is the key for the more formal methods.  PSS = Periodic Steady State. Read more…

## 1 nanoamp Current Source with No Resistors Using Self Cascode MOSFET

Note the 500M Ohm resistor is only to test the current reference.  It would be replaced by your application circuit. Research Links A 2-nW 1.1-V Self-Biased Current Reference in CMOS Technology CMOS Current Reference for UltraLow Energy Consumption  Archive:  Current-Source.7z     Program = LTSPICE Extract into directory.  Includes the required Read more…

## Monte Carlo Analysis with Cadence and the XFAB Design Kit

Getting Monte Carlo analysis to work on Cadence can be a bit of a puzzle given how Cadence is a ball of various software tools stuck together with spit.  You have have seen the following intermodal nastygram: Research Links ReadMeMonteCarlo.txt SPICEModelsAndSimulations_13.pdf

## Adding Series 4000 CMOS library to LTSPICE

SPICE  Research Links Instructions how to use the library files with LTSPICE CD4000.lib  CD4000.zip

## LTSPICE Phase Lock Loop Behavioral Simulation

Behavioral Phase Lock Loop Schematic file

## Capacitor Charge Sharing

When reading about charge pumps you will encounter a phrase like "they act like resistors".  The following example demonstrates why they say that.   So each capacitor ends up with 1/2 Volt on it.  That means the system  starts with 1/2 Joule of energy and when the transfer of charge is done Read more…

## Sage: Open Source Mathematics Software System

Sage is a free open-source mathematics software system licensed under the GPL. It builds on top of many existing open-source packages: NumPy, SciPy, matplotlib, Sympy, Maxima, GAP, FLINT, R and many more.  Access their combined power through a common, Python-based language or directly via interfaces or wrappers. → Tour, Tutorial, Documentation Mission: Creating a viable free open source alternative to Magma, Maple, Mathematica and Matlab.   Read more…

## Using GraphViz to Draw Networks

You need a Frames Capable browser to view this content. This GraphViz graph was animated using vis.js Research Links Animated Graph above is from this page vis.js Network examples vis.js  visual interaction system GraphViz Gephi – The Open Graph Viz Platform Wikipedia: Gephi Enumerating Paths in a Circuit Let's draw Read more…

## LTSPICE NetList

I want LTSPICE or otherwise to put out a spice deck like netlist as shown in the photo inset and the video embedded below.   I have not yet found a way to get this type of output.  All the output formats you can select for export in LTSPICE have the form: Read more…