Wednesday, August 1, 2012

Circuit Designer Requirements



Initial Planning

  • Gather required information for part list, required component locations, and mechanical locations and requirements.
  • Determine if all components are available in existing libraries. If not, use a component creation checklist.
  • Select design template. 
  • Save file by part number. 
  • Enter design information. 
  • Open/load necessary libraries. 
  • Place components and wire together. 
  • Note all current, voltage, high frequency, noise and circuits.
  • Add a note like the following for the most commonly used trace and space in the board designs: "Unless otherwise specified, all circuits are less than .25A and 30V" (this works for 6/6; .006" trace & .006" space).
  • Place power-pin table.
  • Place "last used" and "unused pin/gate" table.
  • Highlight power nets and check each sheet for connectivity.
  • Check for design rules, such as single node net; no node net; unconnected pins; unconnected wires; or other.
  • Generate BOM and compare against part list. 
  • Add necessary notes. 
  • Add sheet numbers. 
  • Print and check schematic visually.
  • Align/modify location, format and styles. 
  • Place all nets into classes. 
  • Generate netlist. 
  • Archive libraries.
  • Check for other concerns:


  1. Are all IC inputs terminated as required? 
  2. Do IC/components have necessary filter caps? 
  3. Are main circuit and branch circuits clearly identified?

No comments:

Post a Comment