SUNY RSFQ Cell Library

D Flip-Flop with Two Readouts

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Schematics

Schematics

All parameters are in PSCAN dimensionless units.

This particular flip-flop has been optimized primarily for the lowest possible static I/O currents and matching I/O impedance, and secondary for the highest XI and XJ margins.

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Mealey Machine

FSM

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How It Works

This circuit is a D flip-flop J7-LM-... with replicated readout comparators J3/J4 and J1/J2. The D2 is a core of any networking switching circuit because it allows to destructively dispatch its contents D to any of the two outputs O1 or O2 using the right readout signal C1 or C2.

Files, necessary to simulate the circuit.

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Transient Waveforms

Waveforms

TransitionDelayAplha
C1/O112.415.3

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Layout

Layout

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References

D. Zinoviev, "Design and Partial Implementation of RSFQ-based Batcher-Banyan Switch and Support Tools", Ph.D. Thesis, State University of New York at Stony Brook, August 1997.

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Dmitry ZINOVIEV