Title :
20-GHz 5-dB-gain analog multipliers with AlGaAs/GaAs HBTs
Author :
Osafune, Kazuo ; Yamauchi, Yoshiki
Author_Institution :
Advanced Devices & Technol. Lab., NTT LSI Labs., Kanagawa, Japan
fDate :
3/1/1994 12:00:00 AM
Abstract :
From-DC-to-above-20-GHz monolithic Gilbert cell analog multipliers have been developed using AlGaAs/GaAs HBT technology. As a double balanced active mixer, it exhibits very high conversion gain of above +5 dB with extremely high LO-IF isolation of 33 dB for RF/LO inputs up to 20 GHz. It exhibits conversion gain of +9 dB for 5 GHz RF/LO inputs. As a double balanced upconverter, it exhibits positive conversion gain with high LO-RF isolation of 23 dB for RF output up to 8.5 GHz. As a detection mixer in coherent optical heterodyne receivers, it can operate for RF/LO inputs up to 15 GHz under a less than -7.5 dBm LO input condition
Keywords :
III-V semiconductors; MMIC; aluminium compounds; bipolar integrated circuits; frequency convertors; gallium arsenide; linear integrated circuits; mixers (circuits); multiplying circuits; optical receivers; 0 to 20 GHz; 5 to 23 dB; AlGaAs-GaAs; AlGaAs/GaAs HBTs; Gilbert cell; LO-IF isolation; analog multipliers; coherent optical heterodyne receivers; conversion gain; detection mixer; double balanced active mixer; double balanced upconverter; Circuits; Gallium arsenide; Heterojunction bipolar transistors; Impedance matching; Mixers; Optical mixing; Optical receivers; Optical sensors; Radio frequency; Resistors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
