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•
06 Aug 1998
TL;DR: In this article, a PLL circuit consisting of a voltage controlled oscillator, a frequency divider which divides the frequency of the output signal from the VOC, a phase detector which compares the phase of a standard signal and the frequency-divided signal and outputs an advanced phase signal and a delayed phase signal.
Abstract: A PLL circuit of which pull-in time is reduced. The PLL circuit comprises a voltage controlled oscillator; a frequency divider which divides the frequency of the output signal from the voltage controlled oscillator; a phase detector which compares the phase of a standard signal and the frequency-divided signal and outputs an advanced phase signal and a delayed phase signal; a charge pump which charges and discharges a capacitor in a low pass filter, depending upon the advanced/delayed phase signals; a voltage supplier which supplies the control terminal of the voltage controlled oscillator with a voltage which corresponds to the desired voltage decided by the different output frequencies of the voltage controlled oscillator, when the output of the low pass filter is not virtually connected with the control terminal of the voltage controlled oscillator.
3 citations
Patent•
17 Oct 1984TL;DR: In this article, a resistor, together with a charging capacitor, is connected in series between the emitters of transistors to constitute an emitter-coupled astable multivibrator to be used with a voltage-controlled oscillator.
Abstract: A resistor, together with a charging capacitor, is connected in series between the emitters of transistors to constitute an emitter-coupled astable multivibrator to be used with a voltage-controlled oscillator. The resistance of the resistor is given by: R.sub.a =(τ.sub.d1 +τ.sub.d2)/2C.sub.a where C a is capacitance of the capacitor and (τ d1 +τ d2 ) is a delay time during one period of oscillation, as determined by the circuit elements.
3 citations
27 Jun 1994
TL;DR: In this paper, a novel class of locally excitatory, globally inhibitory oscillator networks (LEGION) is proposed and investigated analytically and by computer simulation.
Abstract: An novel class of locally excitatory, globally inhibitory oscillator networks (LEGION) is proposed and investigated analytically and by computer simulation. The model of each oscillator corresponds to a standard relaxation oscillator with two time scales. The network exhibits a mechanism of selective gating, whereby an oscillator jumping up to its active phase rapidly recruits the oscillators stimulated by the same pattern, while preventing other oscillators from jumping up. We show analytically that with the selective gating mechanism the network rapidly achieves both synchronization within blocks of oscillators that are stimulated by connected regions and desynchronization between different blocks. Computer simulations demonstrate LEGION's promising ability for segmenting multiple input patterns in real time. This model lays a physical foundation for the oscillatory correlation theory of feature binding, and may provide an effective computational framework for pattern segmentation and figure/ground segregation. >
3 citations