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

被引：30
|
作者：
Carrara, F [1 ]
Palmisano, G [1 ]
机构：
[1] Univ Catania, Fac Ingn, Dipartimento Ingn Elettr Elettron & Sistemi, I-95125 Catania, Italy
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2005年 / 40卷 / 10期
关键词：
linear-in-dB gain control; temperature compensation; variable-gain amplifier (VGA); wideband code-division multiple access (WCDMA);
D O I：
10.1109/JSSC.2005.852827
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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-mu m 46 GHz f(T) silicon bipolar technology and drains up to 6 mA from a 2.7-V power supply.
引用
收藏
页码：2019 / 2024
页数：6
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