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Frequency‐tunable feedforward amplifier for PCS applications
Author(s) -
Echeverría A.,
Fan L.,
Kanamaluru S.,
Chang K.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19991120)23:4<218::aid-mop8>3.0.co;2-#
Subject(s) - amplifier , feed forward , electronic engineering , direct coupled amplifier , computer science , electrical engineering , materials science , engineering , operational amplifier , cmos , control engineering
A novel linear feedforward amplifier with channel tunability was developed for multicarrier wireless communications applications. This amplifier is designed to operate in the personal communication services (PCS) frequency range with a maximum output power of 27 dBm, and offers frequency selectivity by using variable attenuators and variable phase shifters in both the signal and error cancellation loops. The circuit is capable of achieving a variable tuning range of 195 MHz with an intermodulation cancellation of over 60 dBc, and a third‐point intercept point improvement of more than 15 dB. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 23: 218–221, 1999.