Title :
25 Gb/s AGC amplifier, 22 GHz transimpedance amplifier and 27.7 GHz limiting amplifier ICs using AlGaAs/GaAs-HEMTs
Author :
Zhihao Lao ; Berroth, M. ; Hurm, V. ; Thiede, A. ; Bosch, R. ; Hofmann, P. ; Hulsmann, A. ; Moglestue, C. ; Kohler, K.
Author_Institution :
Fraunhofer-Inst. for Appl. Solid-State Phys., Freiburg, Germany
Abstract :
Automatic-gain-control (AGC), transimpedance, and limiting amplifiers are key elements in optical-fiber links and measuring equipment. This AGC amplifier and transimpedance amplifier are based on 0.3 /spl mu/m gate length HEMTs (f/sub T/=50 GHz). The limiting amplifier uses 0.2 /spl mu/m gate length (f/sub T/= 60 GHz) enhancement (e-mode) and depletion (d-mode) AlGaAs/GaAs HEMTs. The AGC amplifier has 18 GHz bandwidth and 30 dB maximum differential gain with 35 dB dynamic range. The transimpedance amplifier has 22 GHz bandwidth with 76 dB/spl Omega/ gain and the limiting amplifier has 27.7 GHz bandwidth with 26 dB differential gain.
Keywords :
HEMT integrated circuits; III-V semiconductors; MMIC amplifiers; aluminium compounds; automatic gain control; field effect MMIC; gallium arsenide; optical communication equipment; wideband amplifiers; 0.2 micron; 0.3 micron; 18 to 22 GHz; 25 Gbit/s; 26 to 30 dB; AGC amplifier IC; AlGaAs-GaAs; AlGaAs-GaAs HEMTs; automatic-gain-control; depletion mode; enhancement mode; limiting amplifier IC; measuring equipment; optical-fiber links; transimpedance amplifier IC; Bandwidth; Differential amplifiers; Dynamic range; Gain; Gallium arsenide; HEMTs; MODFETs; Optical amplifiers; Semiconductor optical amplifiers; Stimulated emission;
Conference_Titel :
Solid-State Circuits Conference, 1997. Digest of Technical Papers. 43rd ISSCC., 1997 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3721-2
DOI :
10.1109/ISSCC.1997.585418
