25 Gb/s AGC amplifier, 22 GHz transimpedance amplifier and 27.7 GHz limiting amplifier ICs using AlGaAs/GaAs-HEMTs

25 Gb/s AGC amplifier, 22 GHz transimpedance amplifier and 27.7 GHz limiting amplifier ICs using AlGaAs/GaAs-HEMTs

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...

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Bibliographische Detailangaben
Hauptverfasser: Zhihao Lao, Berroth, M., Hurm, V., Thiede, A., Bosch, R., Hofmann, P., Hulsmann, A., Moglestue, C., Kohler, K.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Bandwidth
Differential amplifiers
Dynamic range
Gain
Gallium arsenide
HEMTs
MODFETs
Optical amplifiers
Semiconductor optical amplifiers
Stimulated emission
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Beschreibung
Zusammenfassung: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.
ISSN:0193-6530
2376-8606
DOI:10.1109/ISSCC.1997.585418