Switching time in relaxation oscillations of emitter-coupled multivibrators

被引：7

作者：

Filanovsky, Igor M. ^{[1
]}

Oliveira, Luis Bica ^{[2
,3
]}

Verhoeven, Chris J. M. ^{[4
]}

Fernandes, Jorge R. ^{[2
,5
]}

机构：

[1] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2V4, Canada

[2] INESC ID, P-1000 Lisbon, Portugal

[3] Univ Nova Lisboa, P-1099985 Lisbon, Portugal

[4] Delft Univ Technol, NL-2628 CN Delft, Netherlands

[5] Univ Tecn Lisboa, P-1359025 Lisbon, Portugal

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2008年 / 55卷 / 09期

关键词：

emitter-coupled multivibrators; fitting coefficient; oscillation frequency; root-locus; switching time;

D O I：

10.1109/TCSII.2008.923453

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：

This paper gives an estimation of the switching time between ON and OFF transistor states for the emitter-coupled multivibrator. The calculation uses the root locus of the characteristic equation for the oscillator small-signal equivalent circuit, while changing the device current as a parameter. The switching time is found using a fitting location of the root in the right half of the s-plane. The oscillation frequency is also obtained. The approach provides a further insight into switching behavior of relaxation oscillators, gives an accurate estimation of the oscillation frequency, and allows one to establish a useful connection between sinusoidal and relaxation oscillators. The theoretical results are confirmed by simulations.

引用

页码：892 / 896

页数：5

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