VSD Intern - Mixed Signal Physical Design Flow with Sky130

  • Course provided by Udemy
  • Study type: Online
  • Starts: Anytime
  • Price: See latest price on Udemy

Course Description

This course describes how the PNR of an analog IP, 2:1 analog multiplexer is carried out by opensource EDA tools, OpenLANE. It also discusses the steps to modify the current IP layouts in order to ensure its acceptance by the EDA tools

Mixed signal SoC is a chip which contains both analog and digital blocks. The designers are adding more analog circuitry and increasing their complexities day by day. Not only that, they also contain digital control logic. As the process nodes shrink, the demand for integration grows. A divide and conquer approach is followed, where the analog and digital structures were dealt with separately. Usually, an analog IP (Intellectual Property) is bought as black- box

To implement a RTL-to-GDS flow for mixed signal SoC, there is need to establish communication between the analog and digital blocks. For this integration to happen, hierarchical level of abstraction with either analog or digital as top level is required. In order to carry out this task, OpenROAD project can be utilized

Hope you enjoy the session. Any constructive feedback is appreciated

Future Work

  • To include custom LIB for macro and include timing constraints.

  • To perform PNR on macro of triple-height or more


  • Kunal Ghosh, Co-founder, VSD Corp. Pvt. Ltd

  • Openlane team, Efabless corporation

  • Tim Edwards, Senior Vice President of Analog and Design at efabless corporation

  • Nickson Jose, VLSI Engineer

  • Prithivi Raj K, National Institute of Technology Tiruchirapalli

Expected Outcomes

  1. Multi-height RTL2GDS flow for Mixed Signal SoC
  2. Steps to convert basic analog block to hard-macro
  3. Steps to use hard-macro in OpenLANE RTL2GDS flow
  4. Labs to verify Macro based Physical Design flow