Transcript DIGITALLY ASSISTED ANALOG CIRCUITS

PRESENTATION#1
 Introduction
 Motivation
 Key Research Labs
 Future Goals
 Applications
 Published Research
 Conclusion
 Digitally Assisted Analog Circuits.
 This term was used first as a research title in 2004 [1].
 Progress in digital circuits has outpaced performance
growth in analog circuits
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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.
 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].
 The digital assistance for analog circuits are required
for:
 Analog to Digital Converters
 Power Amplifiers
 Direct conversion receivers
 Delta Sigma Modulators
 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
 "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
 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.
 [1] Murmann, B. and B. Boser (2004). "Digitally
Assisted Analog Integrated Circuits." Queue 2(1): 6471.
 [2] Murmann, B. (2006). "Digitally assisted analog
circuits." Micro, IEEE 26(2): 38-47.
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