A new low voltage CMOS current controlled oscillator with minimum phase noise

被引:0
|
作者
Masmoudi, DS [1 ]
Fakhfakh, A [1 ]
机构
[1] Natl Sch Engn Sfax, Sfax, Tunisia
关键词
D O I
暂无
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
In this paper, we present a design of a current controlled oscillator in a 0.35 mu m CMOS process. Owing to its high degree of controllability, the second generation current conveyor is used as a basic block for our oscillator. Thus, the first step in our design is to develop an improved version of second generation current conveyers operating at +/- 1.5V and presenting a current controlled parasitic resistance at port X. Under a current control of 25 mu A, a resistance value of 60 Omega is obtained corresponding to an improvement of a factor of 10. This improved CCII version was used as a basic building block in the design of a current controlled oscillator covering [15MHz-150MHz] frequency range. Phase noise characteristics of the proposed oscillator are investigated. We present then a new methodology of modelling and optimisation of phase noise of current controlled oscillators for CMOS process. This optimization strategy leads to a minimum phase noise acting on device geometries and design sources.
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收藏
页码:616 / 619
页数:4
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