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Area Efficient Asynchronous SFQ Pulse Round-Robin Distribution Network
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DOI：10.1109/TCSI.2023.3327718.png)
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摘要
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We present an area-efficient, asynchronous, single input, and multiple-output Rapid Single Flux Quantum (RSFQ) pulse round-robin distribution network. We adopt the structure of a two-output toggle flip flop (TFF) where incoming pulses are temporarily stored in a SQUID loop in the form of magnetic flux quanta and then directed to outputs in a round-robin fashion. To support additional toggle outputs, we design a new circuit based on TFFs to distribute pulses in a round-robin mechanism to more than two outputs. We also elaborate on our design methodology that can support a different number of outputs while minimizing the number of JJs and power consumption. We then demonstrate a three-and four-output round-robin distribution network constructed with only 14-JJs and 18-JJs with 14.85 mu W and 18.86-mu W power dissipation, respectively. Our four-output design has 40%-70% fewer JJ compared to a similar-functioning four-output network composed of TFFs, DFFs, splitters, and mergers. Our design also consumes 38%-70% less power and has a 16%-64% reduced delay compared to the same four-output TFF network. Finally, we demonstrate the usability of our four output design in the context of a periodic counting network and pulse generator.
Keyword:
Distribution networks
Switches
Magnetic flux
Computer architecture
Pulse generation
Microprocessors
SQUIDs
Balancer
counting network
RSFQ
frequency divider
pulse generator
toggle flip flop
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5.2
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9.8K
被引数:
2.2W
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