Category Archives: PCB Design analysis services

Power Integrity Analysis at System Level

Power Integrity ( PI ) Analysis at System Level 

Power Integrity is not a new term in high-speed digital design and analysis. Ever increasing count of PCB layout planes, form factor limitation, high IC density, cost constraint are few of many factors which results in complex electronic designs.

Power integrity ( PI ) Analysis is sometimes assumed as a sub discipline of Signal Integrity, but as they are coherently related they have distinctive features of their own which are to be done in different ways.  Signal Integrity analysis is based on transmission lines whereas in Power Integrity analysis we are dealing with power distribution through transmission planes.

Power Integrity can identify the potential problems and with appropriate modifications and validations the analysis can be done again, this trial and error approach helps to identify problem on virtual prototypes and saves in turn cost of actual manufacturing and later re-spin of boards.

As explained in one of the white papers as per IEEE EMC symposium the complete definition of power integrity for a power delivery network can be defined as:

  • A power delivery network (PDN) has to deliver sufficiently clean power supply to ICs.
  • The PDN has to provide low noise reference path to signals.
  • The PDN should not radiate excessively.

Depending on the above definition the Power Integrity analysis has different types of simulations which can be listed as:

  • DC Power Integrity ( IR-Drop analysis) : Analysis of trace and plane shapes to determine how much voltage is lost due to the resistance of copper.
  • Decoupling analysis : To meet low impedance requirements.
  • Noise analysis : Noise analysis of IC Power pins or from via to another.

For high-speed and highly-reliable PCB design it is essential to perform pre-layout PDN analysis and Power Integrity analysis is a must for it.

Argus Systems is leader in PCB and system-level design and analysis Services offering Power Integrity AnalysisSI analysis, Thermal Analysis,  Cross-talk analysisEMI Analysis, Reliability, availability and maintainability analysis for applications like Defense, Space, Avionics, Networking,Telecom, Industrial, Medical, Semiconductor, Robotics, Computing and Automotive.

EMI and EMC Simulation and Analysis at Product Design phase

All electronic products which are intended for commercial, residential, industrial or military use must pass EMC (Electromagnetic compatibility) and electromagnetic interference (EMI) standards tests. They must perform their intended function in the electromagnetic environment and also must not  degrade the performance of other devices.

These standards are country specific and are governed by local organizations. The EMI testing on electronic equipment for the United States is  handled by the Federal Communications Commission (FCC) and is commonly referred as Part 15 testing. The EMI testing for Canada is presented in the Industry Canada ICES-003 standard. In Japan the EMI testing standard is outlined by VCCI. Majority of worldwide standards are derived from Comite International Special des Perturbations Radioelectriques (CISPR)  standards or International Electrotechnical Commission (IEC) EMC/EMI/ESD standards.

EMC and EMI tests are often performed late in the product development cycle, generally at the system level using expensive anechoic chamber. This approach leads to lengthy development cycle  and turns out to be very expensive if violations are discovered at this stage.

It is recommended to opt for design analysis services if your product is time or mission critical. Many optimizations can be done at PCB design phase and layout can be modified with minimal cost and effort.Using design, analysis and verification techniques early in design cycle is recommended as it helps in eliminating many layout iterations.

Analysis of radiated emission, far and near field emission , EMC emission can be done. SI and crosstalk issues can be resolved at this stage  These analyses provide insights that helps in successful regulation compliance testing and thus avoid costly hardware re-spins and reduce time-to-market.

Argus Embedded System in USA, UK and India offers various design analysis services including EMI and EMC simulation services and will help you in Identifying EMI/EMC related  problems early in the design cycle to ensure success of your new product.