EDA modelling of POI with direct CMOS-optics hybridization – 1 – Integration of Modelling Tools Integration of Modelling Tools for Parallel Optical for Parallel Optical Interconnects Interconnects in a Standard EDA Design in a Standard EDA Design Environment Environment Michiel De Wilde, Olivier Rits, Wim Meeus, Hannes Lambrecht, Jan Van Campenhout Ghent University, Belgium IMEC
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– 1 – EDA modelling of POI with direct CMOS-optics hybridization Integration of Modelling Tools for Parallel Optical Interconnects in a Standard EDA Design.
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EDA modelling of POI with direct CMOS-optics hybridization– 1 –
Integration of Modelling ToolsIntegration of Modelling Toolsfor Parallel Optical for Parallel Optical
InterconnectsInterconnectsin a Standard EDA Design in a Standard EDA Design
EnvironmentEnvironmentMichiel De Wilde, Olivier Rits, Wim Meeus,Hannes Lambrecht, Jan Van Campenhout
Ghent University, BelgiumIMEC
EDA modelling of POI with direct CMOS-optics hybridization– 2 –
• Normal analog electrical circuits• IP protection: compiled/no real circuit given• Alternative: parameterised flowchart• Validation: comparison with compiled circuit
Receiver flowchart
Transimpedance preamplifier
Postamplifier
Decision circuit
Equalizer
Limiting amplifier
Photocurrentinput
Digital output
EDA modelling of POI with direct CMOS-optics hybridization– 9 –
Post-assembly testing of optical Post-assembly testing of optical linkslinks
• JTAG Boundary Scan cells in RX/TX circuits• DC-free signal alternating on test clock: AC-JTAG
EDA modelling of POI with direct CMOS-optics hybridization– 10 –
Photonics in circuit-level Photonics in circuit-level simulatorssimulators
• Verilog-AMS and VHDL-AMS support “optical power”
• Options at the interface between models:
modelled
device A
modelled
device B
light power light powermodelle
ddevice A
modelled
device B
current-like approach potential-like approach
• Natural choice: current-like approach, but– Kirchhoff’s first law is enforced
– Photons from opposite directions would counteract each other?
• VCSEL model: difficult– nonlinearity– multiple modes– temperature sensitivity + self-heating– many model parameters (>60 for only 2 modes)– datasheet not sufficient
– Ideally: standardized model (~BSIM transistor model)
modelmeasurement
VCSEL current (A)
Out
put
pow
er (
W)
EDA modelling of POI with direct CMOS-optics hybridization– 16 –
Optical pathOptical path
• Two approaches for the optical path:
Routed POF Integrated waveguides
Ribbonisation
Routing on flexible foil
EDA modelling of POI with direct CMOS-optics hybridization– 17 –