Design Con 2015

Rajan Bedi

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CEO Spacechips

Rajan is currently CEO of Spacechips.

Rajan worked at Astrium (now Airbus) for twelve years developing and researching space-grade electronics for telecommunication, navigation, Earth-observation and science missions. As Head of the Mixed-Signal Design Group, Rajan's team developed the hardware for the award-winning, channelising payload currently operating on-board the Alphasat telecommunication satellite.


Rajan Bedi

's contributions
  • 10.31.2014
  • Testing times for design engineers
  • Many thanks for your comment. Although I have worked with some excellent test engineers, I have not met one who I could simply handover pre-production electronics for test and characterisation. For production-grade, flight electronics, definitely yes. In my own case, I have spent many years designing and introducing new technologies such as semiconductors for space applications where we have had to work with our test & measurement partners to create a verification solution and/or specify a new instrument. What I have discovered is that design engineers have equally 'loved' architecting and developing test hardware and software for spacecraft avionics. I really respect the skill to develop automated testing and the value this delivers to overall product development. Rajan.
  • 08.01.2014
  • A comparison of space-grade FPGAs - Part 3
  • Hi Matthias, many thanks for your comment. For non-SRAM, space-grade FPGAs, the two major vendors are Microsemi and Aeroflex. However, given your LVDS I/O and memory requirements, I suggest you contact the folks at Microsemi. What can you share about your mission, e.g. orbit, application, availability of service, radiation requirements, power budget? The answers to this question might also allow you to consider SRAM FPGAs. Rajan.
  • 09.03.2014
  • Pesky parasitics
  • Dave, many thanks for your comment. There are many reasons for the in-band spurious, please email me directly so I can review your design. Rajan.
  • 09.03.2014
  • Pesky parasitics
  • Hi Steve, many thanks for your technical comments. The key point that I want to share with readers is that hardware-design decisions impact commercial and operational concerns. A system-wide appreciation is required to enable the next generation of higher-performing solutions for customers, developed right-first-time and delivered to cost and schedule. As we both share a passion for power electronics, I am prepared to write an independent review of your new book for readers of the Out-of-this-World Design community. I could post next January or February, if this is of interest, please get in touch. Rajan.
  • 08.01.2014
  • A comparison of space-grade FPGAs - Part 3
  • Hi NASA Guy, many thanks for your comment: I agree that beam tests are still needed, however, fault injection is a complementary method if used correctly can limit the amount of time required at a cyclotron. During irradiation, the device under test is rarely tested using identical operational stimuli. As someone who has spent time at these facilities, I am in favour of using all methods to assess the potential sensitivity of a part - fault injection is one such technique that adds value to this process. I note and understand your other comments about space-grade, SRAM-based FPGAs as well as marketing hype. Thanks once again, Rajan.
  • 07.08.2014
  • A comparison of space-grade FPGAs - Part 2
  • Dave, many thanks for your feedback: analog and mixed-signal circuits are indeed sensitive to SETs and in-orbit effects from linear devices were first observed in the 1990s. SETs have unique shapes, polarities, amplitudes and durations that are dependant on impact location, ion LET, biasing, power supply and loading of devices such as op-amps, comparators, references, regulators ADCs and DACs. Rajan.
  • 05.02.2014
  • Switch-mode regulators for space applications
  • Jim, thank you for your kind feedback on this article and many congratulations to you and your colleagues for being part of the team and contributing to our missions. I hope we have the privilege of working together with you on future programs. Rajan.