Topic
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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TL;DR: In this article, an experimental confirmation has been made on a driven relaxation oscillator circuit, first presented by Van der Pol, of the period-addressing route to chaos, modeled by a neon bulb, with a three-segment piecewise-linear current-controlled resistor.
Abstract: Experimental confirmation has been made on a driven relaxation oscillator circuit, first presented by Van der Pol, of the periodadding route to chaos. The nonlinear element in the circuit is a neon bulb, modeled by a three-segment piecewise-linear current-controlled resistor. A simple nonlinear circuit model has been used to reproduce in simulations the experimentally-observed period-adding phenomenon.
102 citations
TL;DR: In this article, the authors describe how relaxation oscillators behave differently in the presence of a non-uniformity of natural frequencies and/or coupling inputs than do arrays of phase oscillators coupled through phase differences.
101 citations
TL;DR: In this paper, a van der Pol relaxation oscillator that is subjected to external sinusoidal forcing can exhibit stable and unstable periodic and almost periodic responses, and it even happens that two stable subharmonics having different periods may coexist.
Abstract: : A van der Pol relaxation oscillator that is subjected to external sinusoidal forcing can exhibit stable and unstable periodic and almost periodic responses. For some forcing amplitudes it even happens that two stable subharmonics having different periods may coexist. The stable responses of such forced oscillators are investigated. By numerically computing the rotation number of stable oscillations for various values of the forcing amplitude and oscillator tuning, descriptions are obtained of regions of phase locking, successive bifurcation of stable subharmonic and almost periodic oscillations, and overlap regions where two distinct stable oscillations can coexist.
101 citations
Patent•
12 Apr 1997TL;DR: In this paper, the output frequency of the RC oscillator may be adjusted by selecting different values of the low voltage level (V1), so that the oscillator signal does not exceed the precise high and low voltage levels (V2, V1).
Abstract: An RC oscillator circuit (10) within a microcontroller chip includes first and second comparators (16, 18) having their outputs respectively coupled to set and reset inputs of a flip-flop (20) whose output is coupled to a series RC network (22, 14) for controlling charging and discharging of a capacitor (14) of the RC network between precise high and low voltage levels (V2 and V1). One input of each comparator is coupled to the RC network, while the second input is coupled to a respective modified high and low threshold voltage level (Vh', V1'), so that the oscillator signal does not exceed the precise high and low voltage levels (V2, V1). The output frequency of the oscillator may be adjusted by selecting different values of the low voltage level (V1).
99 citations
Patent•
26 Apr 2000TL;DR: Several calibration techniques for a precision relaxation oscillator with temperature compensation produces a stable clock frequency over wide variations of ambient temperature as mentioned in this paper. But the calibration techniques provide for different methods of determining CTAT current, PTAT current or the ratio of PTAT currents to CTAT currents.
Abstract: Several calibration techniques for a precision relaxation oscillator with temperature compensation produces a stable clock frequency over wide variations of ambient temperature. The calibration techniques provide for different methods of determining CTAT current, PTAT current or the ratio of PTAT current to CTAT current. The calibration techniques provide different methods for determining CTAT and PTAT calibration values and for setting CTAT and PTAT calibration select switches.
96 citations