Title :
CMOS multi-level signal transmitter for optical communication
Author :
Jung, Sungyong ; Gao, Jean ; Liu, Jin
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA
Abstract :
A multi-level signal transmitter for optical communication was designed using the TSMC 0.18 μm CMOS mix-signal process with up to 10Gbps data throughput. The system consists of a MOS current mode logic (MCML) encoder, a d-flip-flop (DFF), a multi-level generator, and a laser driver. With an input speed of 2.5Gbps and a 1.8V power supply, the eye opening of each level has a height > 7mA and a width > 102ps in the 4-level system, a height > 3mA and a width > 90.14ps in the 8-level system, and a height > 1.5mA and a width > 87ps in the 16-level system with a 10% variance. A new multi-level modulation scheme without employing multiplexing (MUX) in a single channel can be realized on chip with less implementation complexity to improve the spectral efficiency.
Keywords :
CMOS logic circuits; current-mode circuits; driver circuits; optical communication; optical transmitters; 0.18 micron; 1.8 V; 2.5 Gbits/s; CMOS mix-signal process; CMOS multilevel signal transmitter; MOS current mode logic encoder; d-flip-flop; implementation complexity; laser driver; multilevel generator; multilevel modulation scheme; multiplexing; optical communication; single channel; spectral efficiency; CMOS logic circuits; CMOS process; Laser modes; Optical design; Optical fiber communication; Optical transmitters; Power supplies; Signal design; Signal processing; Throughput;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354123
