Cadence
Cadence 5.11 Virtual Machine
Research Links
- Video: Cadence Tutorial 1
- 5.11 download – virtual machine runs on VMWare
Cadence
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
Cadence
Cadence Vector Files
This is mostly a place holder for later when I need to know about Cadence vector files.
Research Links
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
- A 2-nW 1.1-V Self-Biased Current Reference in CMOS Technology
- CMOS Current Reference for UltraLow Energy Consumption
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 Archive:  Current-Source.7z   Program = LTSPICE
Extract into directory. Â Includes the required MOSFET library file. |
Output Current
Supply Current
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-0.18μm-CMOS
- Presentation Level: 0p9-V-5-nW-9-ppm-per-deg-C-Resistorless-Sub-Bandgap-Voltage-Reference-in-0.18μm-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
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  Archive: Voltage-Reference.7z   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
