CURRENT-MODE FOUR-PHASE QUADRATURE OSCILLATOR USING CURRENT DIFFERENCING TRANSCONDUCTANCE AMPLIFIER BASED FIRST-ORDER ALLPASS FILTER

被引：0

作者：

Jin, Jie ^{[1
]}

Wang, Chunhua ^{[1
]}

机构：

[1] Hunan Univ, Coll Informat Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

REVUE ROUMAINE DES SCIENCES TECHNIQUES-SERIE ELECTROTECHNIQUE ET ENERGETIQUE | 2012年 / 57卷 / 03期

关键词：

Allpass filter; Current mode; Current differencing transconductance amplifiers; Quadrature oscillator (QO); CDTA;

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, a CMOS current-mode four-phase quadrature oscillator using current differencing transconductance amplifier (CDTA)-based new first-order allpass filter is proposed. The proposed circuit structure is very simple. It contains only one resistor, two capacitors and three CDTAs. It can provide four quadrature current outputs, and the steady state oscillation is achieved after less than 1 mu s. Additionally, as all the output impedances of the four-phase quadrature oscillator are high, the proposed oscillator circuit can be connected directly to the next stage without any impedance matching requirements. PSPICE simulation results are included to confirm the theory.

引用

页码：291 / 300

页数：10