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solar-eh-power-mgmt-ic

This project aims to create the schematic and layout files (and perform simulation) of a power management IC for solar energy harvesting applications.

Environment:

Overview:

  1. Cadence Virtuoso is used for the analog design and simulation.
  2. Red Hat Linux Enterprise (RHEL) is the OS used.

Working Directory

  1. Make sure your working directory is /home/work/solar_eh_pmic/, before typing virtuoso in terminal. This is the Virtuoso working directory, where libraries are present, and library references are stored.
  2. To change simulation directory (for ADE L), in Virtuoso go to Tools>ADE L>Setup>Simulator/Directory/Host. Here, under Change project directory, enter /home/work/solar_eh_pmic/simulation/SIM_IC61.

Directory & File Structure:

  1. adel_config - Stores simulation configuration files of Spectre (ADE L) simulator, like simulation states, definition files, parametric analysis, expression editor files.
  2. libs - All libraries are stored here, including gpdk_90. The cds.lib file will index (refer to) the libraries here by their relative paths.
  3. simulation (gitignored) - Stores simulation results.
  4. specs - Stores various design specifications and descriptions, purely for designer's perusal.
  5. cds.lib - The file used by Virtuoso to index library locations, to access them.

Documentation:

1. gpdk90 MOS model file: ./libs/gpdk090_v4.6/models/spectre/gpdk090_mos.scs  
2. gpdk90 Design Rule Manual: ./libs/gpdk090_v4.6/docs/gpdk090_DRM.pdf  
3. gpdk90 Reference Manual: ./libs/gpdk090_v4.6/docs/gpdk090_pdk_referenceManual.pdf  
4. Spectremod (simulator used by ADE L) manual: /opt/IC617/doc/spectremod/spectremod.pdf (look into Pg. 1221 "Operating Point Parameters" for definitions of MOSFET operating point parameters)  
5. Analoglib manual: /opt/IC617/doc/analoglibref/analoglibref.pdf  
6. Literally any other doc: /opt/IC617/doc/

RHEL Environment:

To activate sudo permission:

su root # enter password  
usermod -aG wheel work # and then edit /etc/sudoers file by removing the comment (# symbol) in front of: # %wheel ALL=(ALL) ALL  
exit  
exit # then log out and log in again, you will be able to invoke sudo

To change time-zone, date, and time:

# Use the following GUI approach to change time settings  
system-config-date  

# OR, use following cmd-line approach:

# Change timezone:
ls /usr/share/zoneinfo # Check for /etc/share/zoneinfo/Asia/Kolkata
sudo nano /etc/sysconfig/clock # Change contents to ZONE="Asia/Kolkata"
tzdata-update
sudo ln -sf /usr/share/zoneinfo/Asia/Kolkata /etc/localtime
date # To verify timezone, date, and time

# Change date, time:
sudo date +%D -s YYYY-MM-DD # Replace YYYY-MM-DD with current date
sudo date +%T -s HH:MM:SS # Replace HH:MM:SS with current time
date # Verify date, time

Project:

References:

  1. A 10 nW–1 μW Power Management IC With Integrated Battery Management and Self-Startup for Energy Harvesting Applications