Title :
A 10 Gb/s demultiplexer IC in 0.18 /spl mu/m CMOS using current mode logic with tolerance to the threshold voltage fluctuation
Author :
Tanabe, A. ; Umetani, M. ; Fujiwara, I. ; Ogura, T. ; Kataoka, K. ; Okihara, M. ; Sakuraba, H. ; Endoh, T. ; Masuoka, F.
Author_Institution :
Sendai Res. Center, Telecommun. Adv. Organ. of Japan, Japan
Abstract :
A 10 Gb/s 1:8 Demultiplexer (DEMUX) IC for optical-fiber-link systems uses a 0.18 /spl mu/m CMOS process for the first time. A differential logic like MOS current mode logic (MCML) is suitable for 10 Gb/s systems because of its switching speed and power consumption. The maximum operating frequency of MCML is, however, reduced by fluctuation of the threshold voltages (V/sub TH/) of the differential pair transistors. This V/sub TH/ fluctuation is a serious problem for deep submicron MOSFETs. The present circuit uses feedback MCML which is more tolerant to V/sub TH/ fluctuation than conventional MCML technology.
Keywords :
CMOS logic circuits; current-mode logic; demultiplexing equipment; high-speed integrated circuits; optical fibre communication; 0.18 mum; 10 Gb/s demultiplexer IC; 10 Gbit/s; CMOS; current mode logic; deep submicron MOSFETs; differential logic like MOS current mode logic; differential pair transistors; feedback MCML; maximum operating frequency; optical-fiber-link systems; power consumption; switching speed; threshold voltage fluctuation tolerance; CMOS integrated circuits; CMOS logic circuits; CMOS process; Energy consumption; Fluctuations; Frequency; MOSFETs; Optical feedback; Photonic integrated circuits; Threshold voltage;
Conference_Titel :
Solid-State Circuits Conference, 2000. Digest of Technical Papers. ISSCC. 2000 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-5853-8
DOI :
10.1109/ISSCC.2000.839692
