Log-Domain all-pass filter and its application to Quadrature Sinusoidal Oscillator

被引：0

作者：

Prommee, Pipat ^{[1
]}

Pattanatadapong, Thanate ^{[1
]}

Somdunyakanok, Montri ^{[2
]}

机构：

[1] King Mongkuts Inst Technol Ladkrabang, Dept Telecommun Engn, Fac Engn, Bangkok 10520, Thailand

[2] Siam Univ, Dept Elect Engn, Fac Engn, Bangkok 10160, Thailand

来源：

2011 IEEE 54TH INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS (MWSCAS) | 2011年

关键词：

Log-domain filtering; High-frequency; All-pass; Low-voltage; Quadrature Sinusoidal Oscillator; CURRENT CONVEYOR; CIRCUITS; DESIGN;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A realization of current-mode log-domain all-pass filter is proposed. The circuit is a direct realization of a first-order differential equation for obtaining the low-pass filter. The proposed all-pass filter is realized by using log-domain low-pass filter. The log-domain all-pass filters is realized by using only 10 NPN transistors and a grounded capacitor for achieving low-power and fast response. The frequency response and stage gain can be electronically tuned through bias currents. An application of proposed log-domain all-pass filter is a quadrature sinusoidal oscillator. The proposed oscillator is obtained by cascading two all-pass filters loop. A validated BJT model which is used in SPICE simulation operated from a single power supply as low as 2V. The proposed circuit is also suitable for high-frequency applications. SPICE simulation results confirm the theoretical results.

引用

页数：4

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