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Relaxation oscillator

About: Relaxation oscillator is a research topic. Over the lifetime, 1952 publications have been published within this topic receiving 22326 citations.


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Patent
01 Nov 2012
TL;DR: In this article, a reconfigurable element based on nonlinear (chaotic) dynamics is adapted to implement the three different multivibrator configurations (monostable, astable, and bistable).
Abstract: A reconfigurable element based on nonlinear (chaotic) dynamics is adapted to implement the three different multivibrator configurations. A nonlinear dynamical system, under parameter modulating control, operates as a tunable oscillator with different dynamical regimes which in turn provide the different multivibrator configurations (monostable, astable, and bistable). The reconfigurable multivibrator is realized as a tunable circuit which includes an input stage for receiving at least one input voltage signal and an output stage that produces a digital two-level electric output signal. The all-in-one reconfigurable multivibrator device consisting of a nonlinear oscillator circuit electrically coupled to the input/output circuitry is used in at least, but not limited to three basic applications, namely, an irregular width pulse generator, a rising flank trigger and a full RS flip-flop device.

5 citations

Journal ArticleDOI
TL;DR: This work considers the Sel’kov model of glycolytic oscillator for a quantitative study of the limit cycle oscillations in the system and identifies a region of parameter space where perturbation theory holds and uses both Linstedt Poincaré technique and harmonic balance to obtain the shape and frequency of the range.
Abstract: We consider the Sel’kov model of glycolytic oscillator for a quantitative study of the limit cycle oscillations in the system. We identify a region of parameter space where perturbation theory holds and use both Linstedt Poincare technique and harmonic balance to obtain the shape and frequency of the limit cycle. The agreement with the numerically obtained result is excellent. We also find a different extreme, where the limit cycle is of the relaxation oscillator variety, has a large time period and it is seen that, as a particular parameter in the model is varied, the time period increases indefinitely. We characterize this divergence numerically. A calculational method is devised to capture the divergence approximately.

5 citations

Proceedings ArticleDOI
16 Apr 2013
TL;DR: In this paper, the authors present the results of computer simulations as well as real experiments which all confirm the correctness of amendments to what is known as the Barkhausen criterion, necessary for its further application in practice.
Abstract: In this contribution we present the results of computer simulations as well as real experiments which all confirm the correctness of amendments to what is known as the Barkhausen criterion, necessary for its further application in practice [1]. The Barkhausen criterion for the formation of steady state harmonic oscillations is, due to its simplicity, very often used in the design of oscillators with feedback. In the literature, however, there are examples of oscillators that, even when this condition is met, do not oscillate at the desired frequency. In this paper we show in a suitable type of oscillator that for the emergence of harmonic oscillations, additional necessary condition of negative derivative of phase vs. frequency characteristic of the open loop feedback oscillator is needed. If this condition is not met, steady state oscillations may not exist, even if one may expect their existence from the Barkhausen criterion. Moreover, in some types of feedback oscillators, relaxation oscillations may occur at different frequencies as well. For verification of the additional condition, we proposed a proper RLC band pass filter, by means of which it is possible to easily change the sign of the derivative of the phase vs. frequency characteristic.

5 citations

01 Aug 1945
TL;DR: A simplified method for the calculation of the voltage wave forms of nonsinusoidal voltage generators in which the circuit action is dependent upon the exponential charging and discharging of capacitors is presented in this paper.
Abstract: A simplified method is presented for the calculation of the voltage wave forms of nonsinusoidal voltage generators in which the circuit action is dependent upon the exponential charging and discharging of capacitors. A number of multivibrator circuits are then discussed and analyzed in accordance with this method.

5 citations

Proceedings ArticleDOI
28 Aug 1991
TL;DR: In this paper, three different techniques of frequency tuning of ring oscillators are described, and a PLL circuit is designed and tested using bipolar ring oscillator, which is used as a voltage coutrolled oscillator.
Abstract: Bipolar ring oscillators are used extensively in digital gates for the measurement of gate delays. As an application to analog circuits, bipolar ring oscillators may be used as a voltage coutrolled oscillators (VCO) if the frequency tuning of the oscillator is performed by voltage/current. In this paper three different techniques of frequency tuning of ring oscillators are described. A PLL circuit is designed and tested using bipolar ring oscillator.

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202322
202242
202128
202044
201962
201855