Title :
Application of AlGaAs/GaAs HBTs to high-speed CML logic family fabrication
Author :
Madihian, Mohammad ; Tanaka, Shin-ichi ; Hayama, Nobuyuki ; Okamoto, Akihiko ; Honjo, Kazuhiko
Author_Institution :
NEC Corp., Kawasaki, Japan
fDate :
4/1/1989 12:00:00 AM
Abstract :
Discusses the design, fabrication, and performance of the first small-scale integrated logic family, including a current-mode-logic (CML)N inverter, OR/NOR, NAND/OR. exclusive OR/NOR gates, and master-slave flip-flops, implemented using self-aligned AlGaAs/GaAs heterojunction bipolar transistors (HBTs). The HBTs incorporated in the ICs (integrated circuits) are based on a 2.5-μm emitter design rule and exhibit a current gain of 40, a cutoff frequency of 50 GHz, an estimated CML gate-propagation delay time of 24.7 ps, and a non-threshold-logic gate-propagation delay time of 12.3 ps. Successful operation of the logic circuits has been predicted using a SPICE-F simulator and verified experimentally
Keywords :
III-V semiconductors; aluminium compounds; bipolar integrated circuits; gallium arsenide; heterojunction bipolar transistors; integrated logic circuits; 12.3 ps; 2.5 micron; 24.7 ps; 50 GHz; AlGaAs-GaAs; HBTs; NAND/OR; OR/NOR; SPICE-F simulator; current gain; current-mode-logic; cutoff frequency; emitter design rule; exclusive OR/NOR gates; gate-propagation delay time; high-speed; inverter; logic family fabrication; master-slave flip-flops; Cutoff frequency; Delay effects; Delay estimation; Fabrication; Flip-flops; Gallium arsenide; Heterojunction bipolar transistors; Logic design; Master-slave; Pulse inverters;
Journal_Title :
Electron Devices, IEEE Transactions on
