Electronics – Page 6 – A MarketPlace of Ideas

Varying Parameters during a Cadence Transient Analysis – Dynamic Parameters and Feeding Final Conditions into Initial Conditions

Research Links

Virtuoso Spectre Circuit Simulator Reference – Dynamic Parameters during Transient Analysis See page 301. This only allows 1 parameter to be varied per run. See first image below.
Virtuoso ADE L User Guide

Click on the option button to get to the windows where you specify the file to read the circuit initial conditions.

The state file tab has the spectre.fc file specified which is the file that stores the final conditions after a simulation.

….more

By Fudgy McFarlen, 10 yearsSeptember 14, 2015 ago

Cadence

Cadence Vector Files

This is mostly a place holder for later when I need to know about Cadence vector files.

Research Links

By Fudgy McFarlen, 10 yearsSeptember 11, 2015 ago

Architecture

OpenDesk – Open Source Furniture – Downloadable Designs

This furniture is set up for CNC machines that use 4 x 8 ft plywood.

By Fudgy McFarlen, 10 yearsSeptember 7, 2015 ago

Cadence

Cadence: VCO Design Using SpectreRF

By Fudgy McFarlen, 10 yearsSeptember 1, 2015 ago

Cadence

Creating a Parameterized Cell in Cadence

By Fudgy McFarlen, 10 yearsAugust 31, 2015 ago

Books

Book: Designing Analog Chips

Research Links

By Fudgy McFarlen, 10 yearsAugust 18, 2015 ago

Cadence

1 nanoamp Current Source with No Resistors Using Self Cascode MOSFET

Note the 500M Ohm resistor is only to test the current reference. Â It would be replaced by your application circuit.

Research Links

Â Archive: Â Current-Source.7zÂ Â Â Program = LTSPICE

Extract into directory. Â Includes the required MOSFET library file.

Output Current

Supply Current

By Fudgy McFarlen, 10 yearsAugust 13, 2015 ago

Cadence

Ultra Low Current Band Gap References Using NanoAmps of Current with Good MonteCarlo Results

If you need a voltage reference when doing energy harvesting it is very helpful have a band gap reference that uses very little current. Â This topology uses "Self Cascode Mosfet" Â abreviated as SCM. Â The LTSPICE design uses 4.5 nano Amperes and outputs a 0.6 Volt reference voltage.

Research Links

REFERENCIA-DE-CORRENTE-CMOS-PARA-APLICACOES-DE-ULTRABAIXO-CONSUMO-DE-POTENCIAÂ – this is a master thesis in Portuguese but you should be able to understand most of it from the equations and diagrams
A-2-nW-1.1-V-Self-Biased-Current-Reference-in-CMOS-Technology
0p9-V-5-nW-9-ppm-per-deg-C-Resistorless-Sub-Bandgap-Voltage-Reference-in-0.18Î¼m-CMOS
Presentation Level:Â 0p9-V-5-nW-9-ppm-per-deg-C-Resistorless-Sub-Bandgap-Voltage-Reference-in-0.18Î¼m-CMOS
0p7-V-Supply-8-nW,-8-ppm-per-degC-Resistorless-SubBandgap-Voltage-Reference
A Low Voltage CMOS Band Gap Reference – talks about the self cascode MOSFET

Â Â Archive:Â Voltage-Reference.7zÂ Â Â Program = LTSPICE

Extract into directory. Â Includes the required MOSFET library file.

LTSPICE Analysis

Vref versus Temperature

Voltage reference current consumption versus temperature

Monte Carlo Analysis with Cadence

Â Note how tight the voltage control is
Current usage = 1 nAmpere

By Fudgy McFarlen, 10 yearsAugust 11, 2015 ago

Electronics

4 Phase Charge Pump Clock Generators

Document Links

By Fudgy McFarlen, 11 yearsJuly 13, 2015 ago

Cadence

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

By Fudgy McFarlen, 11 yearsJuly 8, 2015 ago