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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Patent•
19 Sep 2008
TL;DR: In this paper, the authors propose a method for offset cancellation in a relaxation oscillator, where each comparator unit stores an input-off voltage on the memory element under the control of the switch control generator such that, in a comparison state, the inputoff voltage is applied to both inputs of the comparator for implementing an offset-free threshold.
Abstract: A relaxation oscillator and a method for offset cancellation in a relaxation oscillator. The relaxation oscillator comprises two comparator units, each comparator unit comprising a comparator element and a memory element; and a switch control generator coupled to each of the comparator units; wherein each comparator unit, in a reset state, stores an input-offset voltage on the memory element under the control of the switch control generator such that, in a comparison state, the input-offset voltage is applied to both inputs of the comparator for implementing an offset-free threshold.
1 citations
TL;DR: In this article, a method to reduce phase noise in relaxation oscillators via the injection of small-amplitude synchronisation signals is investigated and it is shown that high-order synchronisation results in a significant phase-noise reduction over a wide frequency range.
Abstract: A method to reduce phase noise in relaxation oscillators via the injection of small-amplitude synchronisation signals is investigated It is shown that high-order synchronisation results in a significant phase-noise reduction over a wide frequency range
1 citations
Patent•
08 Jan 2014
TL;DR: In this article, a relaxation oscillator circuit consisting of two parasitic triodes, a plurality of resistors and an error amplifier and cascaded current mirrors was proposed to achieve a wide oscillation amplitude, and the current of the temperature compensation current generating circuit and the third resistor were utilized by the temperature compensated voltage generating circuit to generate reference voltage during relaxation oscillation.
Abstract: The invention provides a relaxation oscillator circuit The relaxation oscillator circuit comprises a temperature compensation current generating circuit, a temperature compensation voltage generating circuit, a thermometer encoding control module and a relaxation oscillation frequency generating module, wherein the temperature compensation current generating circuit comprises two parasitic triodes, a plurality of resistors and an error amplifier and further comprises cascaded current mirrors, the transmitting electrode of the first parasitic triode is connected with the reverse input end of the error amplifier and the source electrode of an MP3 (Moving Picture Experts Group Audio Layer-3), a transmitting electrode of the second parasitic triode is connected with the homodromous input end of the error amplifier and a source electrode of an MP4 (Mobile Pentium 4) through the first resistor, the cascaded current mirrors adopt an MP1, an MP2, the MP3 and the MP4 to realize a wide oscillation amplitude, and the current of the temperature compensation current generating circuit and the third resistor are utilized by the temperature compensation voltage generating circuit to generate reference voltage during relaxation oscillation and the threshold voltage of capacitors The design and the configuration of the relaxation oscillator circuit are realized by the circuit structures and the combination thereof, so that the remarkable effects of facilitating massive production and lowering product cost are achieved
1 citations
06 May 2001
TL;DR: This paper investigates a multi-mode oscillations in a four fully-interconnected van der Pol oscillators and finds that a certain non-resonant double mode cannot be synchronized even if its component frequencies are very close.
Abstract: This paper investigates a multi-mode oscillations in a four fully-interconnected van der Pol oscillators. In particular, we focus our attention to the asymmetric system where non-resonant double and triple modes, bifurcated from a 3-fold degenerate mode, can exist. As a result, we found that a certain non-resonant double mode cannot be synchronized even if its component frequencies are very close.
1 citations
19 May 2014
TL;DR: In this article, a sinusoidal Wien-bridge and square wave wide range voltage controlled oscillators are described, which have potential using in different application, e.g. phase locked loops, modulation and detection.
Abstract: This paper presents a sinusoidal Wien-bridge and square wave wide range voltage controlled oscillators. The square wave oscillator's uses ring and relaxation (Schmitt trigger) topology. All described oscillators have potential using in different application, e.g. phase locked loops, modulation and detection. The frequency changing is based on optically coupled resistor with 100 dB dynamic range. The oscillators were constructed and measured.
1 citations