Title :
High-dynamic-range VGA with temperature compensation and linear-in-dB gain control
Author :
Carrara, Francesco ; Santagati, Carmelo ; Palmisano, Giuseppe
Author_Institution :
Facolta di Ingegneria, Catania Univ., Italy
Abstract :
This paper presents the design and measured performance of a novel intermediate-frequency variable-gain amplifier for wideband code-division multiple access transmitters. A compensation technique for parasitic coupling is proposed which allows a high dynamic range of 77 dB to be attained at 400 MHz while using a single variable-gain stage. Temperature compensation and decibel-linear characteristics are achieved by means of a control circuit which provides a lower than 1.5 dB gain error over full temperature and gain ranges. The device is fabricated in a 0.8 μm 46 GHz-fT silicon bipolar technology and drains up to 6 mA from a 2.7 V power supply.
Keywords :
UHF amplifiers; bipolar integrated circuits; code division multiple access; compensation; differential amplifiers; gain control; linearisation techniques; 0.8 micron; 2.7 V; 400 MHz; 46 GHz; 6 mA; IF variable-gain amplifier; Si; WCDMA; bipolar technology; gain error; high-dynamic-range VGA; linear-in-dB gain control; parasitic coupling compensation; temperature compensation; variable-transconductance differential pair; wideband code-division multiple access transmitters; Broadband amplifiers; Coupling circuits; Dynamic range; Error correction; Gain control; Multiaccess communication; Silicon; Temperature control; Temperature distribution; Transmitters;
Conference_Titel :
Bipolar/BiCMOS Circuits and Technology, 2004. Proceedings of the 2004 Meeting
Print_ISBN :
0-7803-8618-3
DOI :
10.1109/BIPOL.2004.1365775
