New CMOS Digitally Controlled Variable Gain Amplifier

被引：3
|
作者：
Hassan, T. M. [1 ]
Mahmoud, S. A. [1 ]
机构：
[1] German Univ Cairo, Dept Elect & Elect Engn, Cairo, Egypt
来源：
2008 INTERNATIONAL CONFERENCE ON MICROELECTRONICS | 2008年
关键词：
CURRENT CONVEYOR; TRANSCONDUCTOR; GENERATION; FILTERS; VLSI;
D O I：
10.1109/ICM.2008.5393795
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：
A novel current-mode CMOS digitally controlled variable gain amplifier (VGA) is presented in this paper. The proposed VGA is based on new +/- 0.75V digitally programmable second-generation current conveyors (DPCCII) with digital current gain control. The input stage of the DPCCII is realized using two complementary MOS differential pairs connected in parallel to ensure rail-to-rail operation. The output stage consists of a class-AB push-pull circuit, which guarantees high current driving capability. The digital control of the DPCCII, based on transistor arrays and MOS switches, provides variable current gain using an n-bits code-word. All proposed circuits are simulated using PSPICE with CMOS TSMC 0.25 mu m technology.
引用
收藏
页码：23 / 26
页数：4
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