Abstract
We have designed a 2-bit Booth encoder with Josephson Transmission Lines (JTLs) and Passive Transmission Lines (PTLs) by using cell-based techniques and tools. The Booth encoding method is one of the algorithms to obtain partial products. With this method, the number of partial products decreases down to the half compared to the AND array method. We have fabricated a test chip for a multiplier with a 2-bit Booth encoder with JTLs and PTLs. It has a processing frequency of 20 GHz with the bias margin ±25%. The frequency of this circuit increases up to 45 GHz with the bias voltage by 25% increased from the design voltage. The circuit area of the multiplier designed with the Booth encoder method is compared to that designed with the AND array method.
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