Diode-HBT-logic circuits monolithically integrable with ECl/CMLcircuits |
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Authors: | Wang K-C Beccue SM Chang M-CF Nubling RB Cappon AM Tsen TC-T Chen DM Asbeck PM Kwok CY |
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Affiliation: | Rockwell Int. Sci. Center, Thousand Oaks, CA; |
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Abstract: | A novel logic approach, diode-HBT logic (DHL), that is implemented with GaAlAs/GaAs HBTs and Schottky diodes to provide high-density and low-power digital circuit operation is described. This logic family was realized with the same technology used to produce emitter-coupled-logic/current-mode-logic (ECL/CML) circuits. The logic operation was demonstrated with a 19-stage ring oscillator and a frequency divider. A gate delay of 160 ps was measured with 1.1 mW of power per gate. The divider worked properly up to 6 GHz. Layouts of a DHL flip-flop and divider showed that circuit area and transistor count can be reduced by about a factor of 3, relative to ECL/CML circuits. The new logic approach allows monolithic integration of high-speed ECL/CML circuits with high-density DHL circuits with high-density DHL circuits |
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