Log-domain All-pass Filter-based Multiphase Sinusoidal Oscillators

被引：0
作者：
Prommee, Pipat [1 ]
Wongprommoon, Natapong [1 ]
机构：
[1] King Mongkuts Inst Technol Ladkrabang, Fac Engn, Dept Telecommun Engn, Bangkok 10520, Thailand
来源：
RADIOENGINEERING | 2013年 / 22卷 / 01期
关键词：
All-pass filter; log-domain filtering; high-frequency; low-voltage; electronically-controlled; multiphase sinusoidal oscillator; STATE-SPACE; INTEGRATOR; DESIGN;
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：
Log-domain current-mode multiphase sinusoidal oscillators based on all-pass filters are presented in this paper. The first-order differential equation is used for obtaining inverting and non-inverting all-pass filters. The proposed oscillators are realized by all-pass filters whose natural frequency and stage gain can be electronically tuned by adjusting the bias currents. Each all pass filter contains 10 NPN transistors and a grounded capacitor. The validated BJT model which is used in SPICE simulation operated by a single power supply as low as 2.5 V. The frequency of oscillation can be controlled over four decades. The total harmonic distortions of these MSO at frequency 56.67 MHz and 54.44 MHz, obtained around 0.52% and 0.75%, respectively. The proposed circuits enable fully integrated in telecommunication systems and also suit to high-frequency applications. Nonideality studies and PSpice simulation results are included to confirm the theory.
引用
收藏
页码：14 / 23
页数：10
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