Relaxation oscillator

About: Relaxation oscillator is a research topic. Over the lifetime, 1952 publications have been published within this topic receiving 22326 citations.

Relaxation oscillator and electronic device

Abstract: The invention provides a relaxation oscillator and an electronic device. The relaxation oscillator comprises: a charge and discharge unit; a switch unit, configured to control the charge and dischargeunit to charge and discharge periodically; a comparator unit, configured to compare the voltage on the charge and discharge unit with a reference voltage; and a trigger unit, configured to generate an oscillating signal based on an output signal of the comparator unit and output the oscillating signal to the switch unit to control the charge and discharge unit to charge and discharge periodically; wherein the comparator unit uses a hysteresis comparator, the hysteresis voltage of the hysteresis comparator is Vh, the swing voltage of voltage signals on the charge and discharge unit is Vs, thecycle when the relaxation oscillator works is T, and the reaction time t of the trigger unit satisfies: Vh > 2Vs x t/T. The relaxation oscillator can eliminate self-excitation of a potential fast feedback loop, so that the stability of the relaxation oscillator is improved. The electronic device has similar advantages.

Differential relaxation oscillator reducing noise effect using differential structure and swing booster technology

Abstract: Disclosed is a differential relaxation oscillator using a differential structure that may stably maintain a differential voltage swing of capacitors despite an influence of an offset voltage and 1/f noise of a comparator, and also generate a dynamic current only at a point in time at which switching is performed, thereby minimizing power consumption.

Locked ranges of frequency divider based on injection-locked relaxation oscillator

Abstract: In this article, the principle for determining locked ranges of the frequency divider based on the injection locked relaxation oscillator (ILRO-FD) is proposed. The proposed principle shows that the ILRO has many frequency-division ratios and can indicate that which ratios are suitable for frequency dividers. In addition, based on the proposed principle, it is found that the patterns of frequency-division ratios of ILRO depend on the charge-pump circuit's current ratio. Moreover, the proposed principle is verified by the simulation results of the ILRO-FD based on 0.35um-CMOS technology of TSMC.

Investigation of stochastic resonance (SR) near homoclinic bifurcation in a unijunction transistor (UJT) relaxation oscillator

Abstract: A P-spice simulation followed by an experiment with a unijunction transistor (UJT) has been carried out to investigate stochastic resonance (SR) in which the response of a nonlinear system to a weak periodic input signal is amplified by an optimum level of noise. The experiments were carried out in the vicinity of homoclinic bifurcation and the quantification of SR has been done by normal variance (NV) and signal to noise ratio (SNR) techniques. We have also developed a tentative mathematical model based on the current-voltage characteristic of the UJT and obtained a second order differential equation that was solved using MATLAB to yield a response similar to the one observed experimentally.