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DIGITALLY ASSISTED ANALOG CIRCUITS

DIGITALLY ASSISTED ANALOG CIRCUITS . PRESENTATION#1. AGENDA . Introduction Motivation Key Research Labs Future Goals Applications Published Research Conclusion. Introduction. Digitally Assisted Analog Circuits. This term was used first as a research title in 2004 [1]. Motivation.

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DIGITALLY ASSISTED ANALOG CIRCUITS

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  1. DIGITALLY ASSISTED ANALOG CIRCUITS PRESENTATION#1

  2. AGENDA • Introduction • Motivation • Key Research Labs • Future Goals • Applications • Published Research • Conclusion

  3. Introduction • Digitally Assisted Analog Circuits. • This term was used first as a research title in 2004 [1].

  4. Motivation • Progress in digital circuits has outpaced performance growth in analog circuits • High speed • Higher device density • Low power consumption • scalable, synthesizable, and self-testable • Signal processing predominantly done in digital domain • Problems in analog circuits • Non-linearity • Device specific noise • Limitations in accuracy and speed.

  5. Future Goals • Reduce power consumption[2] • Reduced mismatch between different processes[2]. • Remove the need for accurate settling time[2]. • Higher speeds.[2] • Design amplifiers that do not require constant biasing [2].

  6. Applications • The digital assistance for analog circuits are required for: • Analog to Digital Converters • Power Amplifiers • Direct conversion receivers • Delta Sigma Modulators

  7. Key Research Labs • Dr. Boris Murmann of the Electrical Engineering Department at Stanford University, USA. • http://www.stanford.edu/group/murmann_group/ • Dr . Joel L. Dawson at Dawson Research Group, MIT,USA. • http://www-mtl.mit.edu/~jldawson/research_group/people.html • Dr. Christian Vogel at Graz University of Technology, Austria. • http://www2.spsc.tugraz.at/people/cvogel/index.html

  8. Published Research • "A 12-bit 75-MS/s pipelined ADC using open-loop residue amplification. "by Murmann, B. and B. E. Boser (2005). IEEE Journal of Solid-State Circuits. Cited by 262 • “Digitally assisted analog circuits” by B Murmann; - Micro, IEEE, 2006. Cited by 39. • “A 5-GHz 20-dBm power amplifier with digitally assisted AM-PM correction in a 90-nm CMOS process” by Palaskas, Y. Taylor;- IEEE Journal of Solid-State Circuits Aug. 2006 - Cited by 19. • “Efficiency improvement techniques at low power levels for linear CDMA and WCDMA power amplifiers” by T Fowler, K Burger, NS Cheng ,Radio Frequency Integrated Circuits (RFIC) Symposium, 2002 -Cited by 61

  9. Conclusion • Digital circuits will dominate future technologies. • Digital assistance will help improve analog circuit to achieve low power consumption, high speed and linearity. • Based on previous work we have listed some applied work.

  10. References • [1] Murmann, B. and B. Boser (2004). "Digitally Assisted Analog Integrated Circuits." Queue 2(1): 64-71. • [2] Murmann, B. (2006). "Digitally assisted analog circuits." Micro, IEEE 26(2): 38-47.

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