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High-dynamic-range variable gain amplifier with temperature compensation and linear-in-decibel gain control

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3 Author(s)
F. Carrara ; Dipt. di Ingegneria Elettrica Elettronica e dei Sistemi, Univ. di Catania, Italy ; P. Filoramo ; G. Palmisano

A novel intermediate-frequency variable-gain amplifier for wideband code-division multiple access transmitters is presented. The circuit includes a compensation technique for parasitic coupling, which allows a high dynamic range of 85 dB to be attained while using a single variable-gain stage. Temperature compensation and decibel-linear characteristic are achieved by means of a control circuit providing a lower than ±1.5 dB gain error over full temperature and gain ranges.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 6 )