Title: A rapid single flux quantum 1 bit arithmetic logic unit constructed with a half-adder cell
Abstract: We have designed, fabricated, and tested a rapid single flux quantum (RSFQ) 1 bit arithmetic logic unit (ALU) block. The circuit consists of three DC current driven SFQ switches and a half-adder. We successfully tested the half-adder cell at clock frequency up to 20 GHz. The switches were commutating output ports of the half-adder to produce AND, OR, XOR, or ADD functions. For a high-speed test, we attached two switches at the input ports of the half-adder to control the high-speed input data by low-frequency pattern generators. The output in this measurement was an eye-diagram. Using this set-up, the circuit was successfully tested up to 20 GHz. The chip was fabricated using a standard HYPRES 1 kA cm−2 Nb Josephson junction fabrication process.
Publication Year: 2004
Publication Date: 2004-04-02
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 3
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