soliton electronicspeople.seas.harvard.edu/~donhee/eso_presentation.pdfelectrical soliton oscillator...
TRANSCRIPT
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Soliton Electronics
David Ricketts Xiaofeng Li
Donhee Ham
Harvard University
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Solitons: Review
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Solitons: Review (1)
Dispersion Nonlinearity
“Balancing Act”
Soliton
• Shape maintenance (if loss = 0)• Pulse state maintenance (if loss>0)
• Unique collision & propagation
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Solitons: Review (2)
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Solitons: Review (3)
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Scott Russell
Solitons: Review (4)
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Solitons: Review (5)
• Water (Russell)
• Mechanical lattice (Fermi)
• Plasma (Zabusky & Kruskal)
• Optical fiber (Haus, Gordon)
• Magnetic films, superconductors, etc.
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Electrical Solitons: Review (1)
Soliton pulse train (Cnoidal wave)
Mono pulse case
NonlinearTransmission Line (NLTL)
Rodwell et al, Proc. IEEE, 1994. (Review article)
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Electrical Solitons: Review (2)
Amplitude-dependent speed
Amplitude modulation
Phase modulation
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Electrical Solitons: Review (3)
• Transient, soliton-forming process• 2-port applications (Pulse sharpening)
Rodwell et al, Proc. IEEE, 1994. (Review article)Van der Weide, APL, 1994.
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Problem Statement
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Donhee Ham
Past 46 years
Can we build a soliton
oscillator?
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Electrical Soliton Oscillator
• Original articles (05-07): IEEE T-MTT, IEEE ISSCC, & IEEE JSSC• Invited articles: IEEE CICC, IEEE LEOS, IEEE RFIC, IEEE
Communications Magazine, & McGraw-Hill 2008 Yearbook of Science & Technology
Nature 2006
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Ring NLTL
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Soliton Oscillator Topology
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Oscillation Instability Problem
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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The Soliton Oscillator Team
Xiaofeng LiDavid Ricketts
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Sine Qua Non of Oscillation Instability “Soliton Collisions”
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Detailed Instability Mechanisms (1)
“Saturation”
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Ricketts, Li, & Ham, IEEE T-MTT, 2006.
Detailed Instability Mechanisms (2)
G. J. Ballantyne, PhD dissertation, U. Canterbury, 1994.
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“Multi modes”
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
Detailed Instability Mechanisms (3)
“Perturbations”
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“Taming the Unruly Solitons”
Saturation reduction
Perturbation rejection
Single mode selection
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Operating Principle (1)
Initial start-up bias
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Operating Principle (2)
Start-up
Start-up transient: dc component
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Operating Principle (3)
Saturation reduction
Steady-State Bias
Perturbation rejection
“Saturable Absorption”
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Operating Principle (4)
Single mode selection
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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1st Prototype
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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1st Prototype: Schematic
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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1st Prototype: Startup Dynamics
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
[40 µs/div][40 µs/div]
(8-th)
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1st Prototype: Startup Dynamics
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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1st Prototype: Steady-State OscillationIEEE
T-MTT2006.
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1st Prototype: Limit Cycle
Ricketts, Li, Sun, Woo, & Ham IEEE JSSC 2007
V
dV/dt
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1st Prototype: Spatial DynamicsRicketts, Li, & Ham,IEEE T-MTT, 2006.
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2nd Prototype
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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2nd Prototype: Schematic
Ricketts, Li, Sun, Woo, & Ham IEEE JSSC 2007
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2nd Prototype: Operation
Ricketts, Li, Sun, Woo, & Ham IEEE JSSC 2007
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2nd Prototype: Steady-State Oscillation
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Bondwire Inductors Varactors
Prototype 7.5mm x 2.7mm
3rd CMOS Prototype
Ricketts & Ham, IEEE ISSCC, 2006.
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PicoProbe(26 GHz)
To Oscilloscope (<7 GHz)
3rd CMOS Prototype
Ricketts & Ham, IEEE ISSCC, 2006.
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Minimum - 293ps
3rd CMOS Prototype
Ricketts & Ham, IEEE ISSCC, 2006.
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Electrical Soliton Oscillator
- Chaotic Operation -
• Original articles: IEEE JSSC• Invited articles: IEEE Communications Magazine
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Let’s Revisit the Case with a Saturating Amplifier.
Ricketts, Li, & Ham, IEEE T-MTT, 2006.
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Simple Chaotic Soliton Oscillator
Ricketts, Li, Sun, Woo, & Ham IEEE JSSC 2007
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Chaotic Oscillation
Ricketts, Li, Sun, Woo, & Ham IEEE JSSC 2007
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Lyapunov Analysis
Ricketts, Li, Sun, Woo, & Ham IEEE JSSC 2007
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Applications
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• Ultra-fast time-domain
metrology
• Impulse radio & radar
(“X”WB)
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Chaotic Communication
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• MIT: Charles G. Sodini & Kevin Kyungbum Ryu
• Analog Devices: Larry Devito & Rick Sullivan
• U. Canterbury: Gary Ballantyne & Desmond Taylor
• Harvard: Matt DePetro, Ali Belabbas, & Roger Brockett
• Stanford: Thomas H. Lee
Acknowledgement