Title :
2-bit adder: carry and sum logic circuits at 19 GHz clock frequency in InAlAs/InGaAs HBT technology
Author :
Mathew, T. ; Jaganathan, S. ; Scott, D. ; Krishnan, S. ; Wei, Y. ; Urteaga, M. ; Rodwell, M.J.W. ; Long, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
9/13/2001 12:00:00 AM
Abstract :
Carry and sum circuits for a 2-bit adder used in a pipelined 2N-bit adder-accumulator architecture are reported. To obtain high clock rates in a design with multiple gate delays a novel merged AND-OR-Latch structure using four-level series gated current steering logic is employed. These integrated circuits were fabricated in InAlAs/InGaAs transferred substrate heterojunction bipolar transistor technology and operate up to 19 GHz clock rate
Keywords :
III-V semiconductors; adders; aluminium compounds; bipolar logic circuits; gallium arsenide; heterojunction bipolar transistors; indium compounds; 19 GHz; 2 bit; InAlAs-InGaAs; InAlAs/InGaAs heterojunction bipolar transistor; carry-and-sum logic circuit; four-level series-gated current steering logic; integrated circuit; merged AND-OR-latch structure; multiple gate delays; pipelined adder-accumulator architecture; transferred substrate technology;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010788
