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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
27 Jun 2012
TL;DR: In this paper, a micropower acoustooptical hypnotizing device periodically gives off rhythmed "tick and tick" sound like rain falling onto steps in a set time period, and an insomnic user can fall asleep easily while listening or counting the tick sounds.
Abstract: The invention relates to a micropower acoustooptical hypnotizing device. The hypnotizing device consists of a 220V alternating current power supply, a full bridge rectifier circuit, a filter circuit, a neon bulb relaxation oscillator and an oscillator working frequency regulator circuit, wherein the neon bulb relaxation oscillator consists of a neon bulb NP, a piezoelectric ceramic wafer HTD and an electrolytic capacitor C2; and the full bridge rectifier circuit and the filter circuit consist of silicon rectifier diodes D1, D2, D3 and D4 and an electrolytic capacitor C1. Proper rhythmed sounds can settle people's nerves and make them calm and relax and want to sleep. Based on this principle, the micropower acoustooptical hypnotizing device periodically gives off rhythmed 'tick and tick' sound like rain falling onto steps in a set time period, and an insomnic user can fall asleep easily while listening or counting the tick sounds.

1 citations

Proceedings ArticleDOI
24 May 2009
TL;DR: This paper proposes a new remote frequency calibration method that allows a passive wireless microsensor to adjust the oscillation frequency of its local oscillator using a calibrating reference signal sent by its reader in the form of a modulated tone.
Abstract: This paper proposes a new remote frequency calibration method that allows a passive wireless microsensor to adjust the oscillation frequency of its local oscillator using a calibrating reference signal sent by its reader. The reference signal is transmitted wirelessly by the reader in the form of a modulated tone. Frequency calibration is achieved by employing an injection-locking phase-locked loop that adjusts the oscillation frequency of the relaxation oscillator of the microsensor to that of the reference signal. The hysteresis of the relaxation oscillator is created by a novel mono-stable current pulse generating circuit also proposed in this paper. The proposed remote frequency calibration system has been designed in TSMC-0.18µm 1.8V 6-metal 1-poly CMOS technology and analyzed using SpectreRF from Cadence Design Systems with BSIM3V3 device models. The power consumption of the VCO is 525 nW while that of the system is 912 nW.

1 citations

Journal ArticleDOI
TL;DR: It is shown that the use of linear algorithms for estimating the performance of a regression oscillation wave train model allows one to guarantee picosecond accuracy of the interpolative measurements.
Abstract: This article is dedicated to the study of the interpolative measurement of event occurrences based on the digital processing of a relaxation oscillator generated during the event occurrence. It is shown that the use of linear algorithms for estimating the performance of a regression oscillation wave train model allows one to guarantee picosecond accuracy of the interpolative measurements. The technique’s accuracy capabilities are illustrated by the results of actual measurements and computer modeling.

1 citations

Journal Article
TL;DR: In this article, a relaxation oscillator was used to perform capacitance microscopy of metal structures, such as machined grooves and coins, in constant-height (non-contact) or tapping (contact) mode.
Abstract: We have performed scanning capacitance microscopy using a relaxation oscillator. Precision calibrations indicate a sensitivity on the order of 0.05 pF. Surface topography of metallic structures, such as machined grooves and coins, can be readily obtained either in the constant-height (non-contact) or tapping (contact) mode. Spatial resolution of less than 50 μm has been achieved. Our simple, low-cost system can be a valuable platform in the undergraduate laboratory, providing students with experience in microscopic imaging techniques.

1 citations

Proceedings ArticleDOI
01 Dec 2010
TL;DR: In this paper, an online period control method was developed to solve the stability problem and realize ascending slope for a biped quasi passive walker, where a mechanical oscillator was used to control the robot utilizing frequency entrainment.
Abstract: A passive walker is a kind of robot that consumes low energy through body dynamics. However, it is difficult to stabilize it in various environments, because it is hard to synchronize the rocking period of the robot with the swing leg period. This research developed an online period control method to solve the stability problem and realize ascending slope for a biped quasi passive walker. A mechanical oscillator is used to control the robot utilizing frequency entrainment. The Van der Pol equation and a PI controller were utilized to determine the target path of the mechanical oscillator. Finally, the validity of the proposed methods was analytically examined by numerical simulation ODE (Open Dynamics Engine).

1 citations


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