Digitally-Controlled Variable-Gain-Amplifier Based on Current Conveyor with Opamp and Inverters Only

被引：2
|
作者：
Farag, Fathi A. [1 ]
Khalaf, Yaser A. [1 ]
机构：
[1] Zagazig Univ, Elect & Commun Dept, Zagazig, Egypt
来源：
2010 INTERNATIONAL CONFERENCE ON MICROELECTRONICS | 2010年
关键词：
D O I：
10.1109/ICM.2010.5696123
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 a new topology of a Digitally-Controlled current-mode-Variable-Gain-Amplifier "DCVGA". A fully differential DCVGA is proposed, which improves the VGA performance. The proposed circuit is based on the current conveyor cell reported in [1]. The circuit is suitable for low-power low-voltage applications since it is based on CMOS inverters. The proposed DCVGA achieves linear-in-dB gain variation at 1dB resolution. The variable gain is tuned from -5 to 36 dB. The proposed circuits have been designed and simulated using 0.13 mu m IBM CMOS process. The simulation results show good performance in both gain-tuning ability and frequency response. Also, the 3-dB bandwidth is about 50 kHz at maximum gain. The power dissipation is 2.1mW from 1.5V supply voltage.
引用
收藏
页码：224 / 227
页数：4
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