
Acquisizione a schermo intero 06042012 232433.bmp.jpg
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Effects of pcb versions on the startup of the overtone crystal oscillator. The "short" TLs that model the pcb traces (5ps/mm) have a major impact on this behavior.
pierobelfortedwssimulatorwaveswanecltlmtransmission lineorbitstatuposcillatorcrystalquartzpcb
lh4.ggpht.com

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Spectrum of the signal related to the overtone crystal oscillator. The peak frequency (about 178.6 Mhz) corresponds to the fifth harmonic of the quartz connected to the feedback loop of the ECL amplifier. As known this kind of sims involving high-Q components , switches and "short" TLs are practically impossible with Spice.
pierobelfortedwssimulatorwaveswanecltlmtransmission lineorbitstatuposcillatorcrystalquartzspectrum
lh6.ggpht.com

Acquisizione a schermo intero 02042012 133635.bmp.jpg
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Simulated TDR response of 200X250X.035 mm metal plates FR4 laminate and related DWS netlist. The metal plate is modeled as an array of lossy TLs (method discovered by Piero Belforte, 1993). The sim runs in a fraction of second on an I7 PC.
pierobelfortedwssimulatorwaveswans_parametersequalizerworstcaseeyediagramgigabitcmltlmtransmission linemicrobehavoral
lh6.ggpht.com

Acquisizione a schermo intero 22022012 163210.jpg
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Emphasis and 3-taps FFE (Feed Forward Equalizer) sims related to a simple one pole differential channel. A portion of DWS netlist is also shown.
pierobelfortedwssimulatorwaveswans_parametersequalizerworstcaseeyediagramgigabitcmltlmtransmission linemicrobehavoral
lh3.ggpht.com

Acquisizione a schermo intero 02042012 133432.bmp.jpg
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Full view of the simulated TDR response of 200X250X.035 mm metal plates FR4 laminate . This microbehavioral model is extremely fast and accurate and was adopted in the Presto post-layout environment (1995-2000).
pierobelfortedwssimulatorwaveswans_parametersequalizerworstcaseeyediagramgigabitcmltlmtransmission linemicrobehavoral
lh5.ggpht.com

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Previous PSK TRANSMISSION SYSTEM waveforms displayed in multiplot mode.
pierobelfortedwssimulatorwaveswans_parametersequalizerworstcaseeyediagramgigabitcmltlmtransmission linepsktransmissionsystem
lh5.ggpht.com

Acquisizione a schermo intero 24022012 131644.bmp.jpg
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Decision Feedback Equalization applied to a simple low-pass RC channel.
pierobelfortedwssimulatorwaveswans_parametersequalizerworstcaseeyediagramgigabitcmltlmtransmission linemicrobehavoraldfedecision feedback
lh4.ggpht.com

Acquisizione a schermo intero 27022012 111029.jpg
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Emphasis, analog equalizer and DFE (Decision feedback equalizer) sims related to a differential trace characterized by TDR (20Gbps). A portion of DWS netlist is also shown.
pierobelfortedwssimulatorwaveswans_parametersequalizerworstcaseeyediagramgigabitcmltlmtransmission linemicrobehavoraldfedecision feedbackemphasis
lh4.ggpht.com