DC 30 GHz bandwidth and 36 dB gain limiting amplifier for 40 Gbit/s optical transmission systems

1997 ◽  
Vol 33 (25) ◽  
pp. 2139 ◽  
Author(s):  
Z. Lao ◽  
R. Bosch ◽  
V. Hurm ◽  
A. Thiede ◽  
M. Schlechtweg ◽  
...  
Keyword(s):  
Optical Transmission ◽  
Transmission Systems ◽  
Limiting Amplifier ◽  
Optical Transmission Systems

A SiGe HBT IC CHIPSET for40-Gb/s OPTICAL TRANSMISSION SYSTEMS

2003 ◽  
Vol 13 (01) ◽  
pp. 239-263
Author(s):  
T. MASUDA ◽  
N. SHIRAMIZU ◽  
E. OHUE ◽  
K. ODA ◽  
R. HAYAMI ◽  
...  
Keyword(s):  
Silicon Germanium ◽  
Optical Transmission ◽  
High Gain ◽  
Transimpedance Amplifier ◽  
Transmission Systems ◽  
Sige Hbt ◽  
Limiting Amplifier ◽  
Optical Transmission Systems ◽  
Decision Circuit ◽  
Time Division

Using a 0.2-μm self-aligned epitaxial-growth silicon-germanium (SiGe) heterojunction bipolar transistor (HBT) technology, we have developed a chipset for 40-Gb/s time-division multiplexing optical transmission systems. In this paper, we describe seven analog and digital ICs: a 45-GHz bandwidth transimpedance amplifier, a 48.7-GHz bandwidth automatic-gain-controllable amplifier, a 40-Gb/s decision circuit, a 40-Gb/s full-wave rectifier, a 40-Gb/s limiting amplifier with a 32-dB gain, a 45-Gb/s 1:4 demultiplexer, and a 45-Gb/s 4:1 multiplexer. To increase bandwidth of the transimpedance amplifier, a common-base input stage is introduced. In order to have high gain and wide bandwidth simultaneously, active load circuits composed of a differential transimpedance amplifier are used for the AGC amplifier, the limiting amplifier, and the decision circuit. Full-rate clocking is employed to reduce the influence caused by clock-duty variation in digital circuits such as the decision circuit, the demultiplexer, and the multiplexer. All ICs were characterized by using on-wafer probes, and some of them were built in brass-packages for bit-error rate measurement.

CNR characteristics of optical transmission systems employing super wide-band FM technique

2000 ◽  
Vol 83 (7) ◽  
pp. 50-60
Author(s):  
Masaru Fuse ◽  
Yoshikazu Ishii ◽  
Yoshiharu Kudo ◽  
Kazuhiro Nojima ◽  
Seiichiro Kawashima ◽  
...  
Keyword(s):  
Optical Transmission ◽  
Wide Band ◽  
Transmission Systems ◽  
Optical Transmission Systems
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