High-dynamic-range VGA with temperature compensation and linear-in-dB gain control

Author

Carrara, Francesco ; Palmisano, Giuseppe

Author_Institution

Dipt. di Ingegneria Elettrica Elettronica e dei Sistemi, Univ. di Catania, Italy

Volume

40

Issue

10

fYear

2005

Firstpage

2019

Lastpage

2024

Abstract

This paper presents the design and measured performance of a novel intermediate-frequency variable-gain amplifier for Wideband Code-Division Multiple Access (WCDMA) 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 characteristic 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 f_T silicon bipolar technology and drains up to 6 mA from a 2.7-V power supply.

Keywords

bipolar analogue integrated circuits; code division multiple access; compensation; gain control; integrated circuit design; integrated circuit measurement; radio transmitters; wideband amplifiers; 0.8 micron; 2.7 V; 400 MHz; 46 GHz; VGA; WCDMA transmitters; dynamic range; intermediate frequency variable gain amplifier; linear gain control; temperature compensation; wideband code division multiple access; Broadband amplifiers; Coupling circuits; Dynamic range; Error correction; Gain control; Multiaccess communication; Silicon; Temperature control; Temperature distribution; Transmitters; Linear-in-dB gain control; temperature compensation; variable-gain amplifier (VGA); wideband code-division multiple access (WCDMA);

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2005.852827

Filename

1506889