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 , the phase-locking properties of two coupled cellular automata (CA) phase oscillators for applying to CPGs were theoretically analyzed and it was shown that the ergodically coupled CA phase oscillator is more suitable for applying in terms of phase locking.
Abstract: In this paper, phase-locking phenomena in two coupled cellular automaton (CA) phase oscillators for applying to central pattern generators (CPGs) are theoretically analyzed. The two CA phase oscillators are asynchronously coupled and referred to as the ergodically coupled CA phase oscillators since transition moments of discrete states are described by an irrational rotation. The theoretical analysis reveals stable fixed points that guarantee phase-locking in the ergodically coupled CA phase oscillators. It is then shown that the ergodically coupled CA phase oscillators are more suitable for applying to CPGs than the synchronously coupled CA phase oscillators in terms of phase-locking phenomena.
23 Nov 2020
TL;DR: In this paper, an ultra-low power relaxation oscillator with novel Ultra-Low Leakage Switch (ULLS) and temperature-compensated resistor (TCR) was proposed.
Abstract: This paper proposes an ultra-low power relaxation oscillator with novel Ultra-Low Leakage Switch (ULLS) and temperature-compensated resistor (TCR) The ULLS decreases the leakage current over 90 dB, and the leakage variation against temperature can be also reduced about $\times 67$ The TCR designed for the oscillator can reach a temperature coefficient of 008 % $\mathrm{ppm}^{\circ} \mathrm{C}$ By utilizing resistive frequency locked structure with the proposed ULLS and well-designed TCR, the proposed oscillator achieves higher energy efficiency and better temperature performance than most existing oscillators in literature It has an ultra-lower power of 876 nW (with an ultra-low leakage of 3 nW) simulated temperature sensitivity and supply voltage sensitivity are $239 \mathrm{ppm} /^{\circ} \mathrm{C}$ and $041 \% / \mathrm{V}$, respectively
TL;DR: In this article, the operation of the push-pull relaxation oscillator (multivibrator) is interpreted as the action of an electronic switch of the two-way type which periodically charges and discharges two capacitors in alternate sequence.
Abstract: Summary The operation of the push-pull relaxation oscillator (multivibrator) is interpreted as the action of an electronic switch of the two-way type which periodically charges and discharges two capacitors in alternate sequence. Based on this interpretation a simple expression is derived for the approximate computation of the oscillation frequency in the symmetrical case of oscillator arrangement. In the mathematical treatment an approximately equivalent linear relation is substituted for the non-linear characteristics of the thermionic vacuum tubes used as the electronic switch. The frequencies predicted by the approximate treatment agree within 1 to about 15 per cent, with various results obtained by experiment.
01 Sep 2014
TL;DR: In this paper, an oscillator based active bridge set-up that can be used for in-circuit resistance measurement for a wide range of values has been designed for direct measurements of resistance of networks of arbitrary configuration.
Abstract: This work deals with the designing of an oscillator based bridge set-up that can be used for in-circuit resistance measurement for a wide range of values. The circuit utilizes op-amp based active bridge in integration with relaxation oscillator to convert the resistance change into time period or duty cycle. The addition of an oscillator makes the bridge self-sustaining in nature. A novel, low cost, and highly sensitive active bridge is given for direct measurements of resistance of networks of arbitrary configuration. It can, in addition be used for the measurement of discrete resistors and resistance of the resistive sensor. The proposed circuit that we are studying is found to give accurate results for discrete resistance values in the lower range of 20 Ω - 900Ω. Also, the circuit has been interfaced with RTD (a resistive sensor) to confirm its effectiveness for small resistance measurement.
Patent•
14 Nov 2008
TL;DR: In this article, a blocking oscillator type converter circuit with a transformator that only comprises a primary winding and a secondary winding is described, and the control voltage for the oscillator is derived from the primary voltage of the transformator during the free-wheeling phase.
Abstract: According to the invention, a blocking oscillator type converter circuit functions with a transformator that only comprises a primary winding and a secondary winding. Said transformator does not comprise a return coupling winding for the blocking oscillator. The control voltage for the oscillator is derived from the primary voltage of the transformator during the free-wheeling phase. The invention also relates to a voltage monitoring circuit that works independently from the oscillator, the output voltage of the oscillator being repressed when the voltage on the output of the blocking oscillator is too high. A power monitoring circuit functions independently from the oscillator and the voltage monitoring circuit and suppresses the impulses for the power transistor when the power on the output side exceeds a predetermined measurement.