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Rajan Bedi

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Head of Mixed-Signal Design Group at EADS Astrium

Rajan Bedi has been leading the design of high-speed, mixed-signal, baseband and RF electronics for use on telecommunication satellites for over ten years. He also supports the development of space-grade electronics and on-board data processing techniques for use on navigation, Earth observation and science payloads & platforms. Rajan partners with some of the world’s leading electronics companies to advance their capability together with the space industry.


Rajan Bedi

's contributions
  • 12.17.2013
  • 6 Comment(s)
Twinkle twinkle little stars!
  • 11.08.2013
  • 1 Comment(s)
Behaving passively!
  • 08.16.2013
  • 9 Comment(s)
Alphasat's Champagne moment!
  • 07.17.2013
  • 18 Comment(s)
You guys are dinosaurs!
  • 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.
  • 03.26.2014
  • Linear voltage regulators for space applications
  • David, For applications where the output voltage is close to the input, the light-load efficiency of an LDO can be higher than a SMPS as there are no a.c. switching losses. Many thanks for your comment, Rajan.
  • 02.25.2014
  • Is your spacecraft flying reliable chips?
  • David, commercial foundries are optimised to yield high-volume die for the consumer market and many have no commercial incentive to provide long-term relaibaility data. The high-volume automotive and aeronautical markets require reliability data for the latest nodes so we need to work together with our foundry partners to share such data. If you are willing to share the fabrication technology with me (either privately or publically), I maybe able to help. Rajan.
  • 01.29.2014
  • I'm giving her all she's got, captain!
  • Chris, Thank you for your kind feedback: I'm aware of your company's POL and LDO and we are considering both parts. For certain light-load applications and/or where the output voltage is very close to the input voltage, LDOs can be shown to be more efficient than a switcher. Rajan.
  • 12.17.2013
  • Twinkle twinkle little stars!
  • Arny, I know exactly what you are trying to get at here: we had to add external discrete LVDS transceivers on one design which was expensive. Other versions of TIA/EIA-644 LVDS I/O also need to be supported!
  • 08.16.2013
  • Alphasat's Champagne moment!
  • Don, Thank you very much for your kind words. Thank you also for the leadership that you showed during the project - without your efforts, a key technology would never have been de-risked. The space industry will always be indebted to you and your team for qualifying an enabling technology that has advanced on-board, payload processing. It was an honour to have worked with you and I hope we get the opportunity to work together again on similar projects in the future.
  • 07.17.2013
  • You guys are dinosaurs!
  • I've had this discussion with colleagues in the past and I try to use computers to automatically run analyses in the background. Many companies within our industry are resistant to change and have fat, expensive processes - doesn't mean we should stop trying though!