scispace - formally typeset
Search or ask a question
Topic

Relaxation oscillator

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


Papers
More filters
Proceedings ArticleDOI
15 Sep 2009
TL;DR: In this article, the authors consider the oscillator where the transition from relaxation to sinusoidal oscillations goes in opposite direction, and show that oscillators and multivibrators are not separate classes of circuits.
Abstract: When multivibrators are forced to operate at high frequencies one usually observes transition from relaxation to sinusoidal oscillations. One considers that at these frequencies the parasitic capacitors of active devices become comparable with functional capacitors, and the effect of parasitic produces this “smoothing” of oscillations. This paper considers a counterintuitive example: the oscillator where the transition goes in opposite direction. The operation starts from sinusoidal oscillations at low frequencies. Reducing the functional capacitor value one obtains relaxation oscillations at higher frequencies. This example shows that oscillators and multivibrators are not separate classes of circuits.

8 citations

Journal ArticleDOI
TL;DR: In this article, a relaxation resonance peak in the frequency spectrum of an anti-reflection coated low reflectivity laser diode was found at >20 GHz, which has not been reported previously.
Abstract: Solving the rate equations without spatial averaging reveals the existence of a relaxation resonance peak in the frequency spectrum of an anti-reflection coated low reflectivity laser diode. This peak occurs at >20 GHz which has not been reported previously. Such a diode may have potential applications in high frequency microwave transmission.

8 citations

Patent
24 Jan 1990
TL;DR: A battery charging system incorporating a unijunction relaxation oscillator circuit and an electronic current limiting control circuit for de-energizing the battery charging current exceeds a certain minimum value is described in this paper.
Abstract: A battery charging system incorporating a unijunction relaxation oscillator circuit and an electronic current limiting control circuit for de-energizing the relaxation oscillator circuit when the battery charging current exceeds a certain minimum value. The system preferably also includes a voltage control circuit and a temperature control circuit all of which are connected in parallel with the electronic current limiting control circuit in order to de-energize the relaxation oscillator circuit when the respective voltage and temperature of the system exceeds certain predetermined minimum values. The electronic current limiting control circuit, the voltage control circuit and the temperature control circuit are included in corresponding solid state integrated circuits.

8 citations

Journal ArticleDOI
TL;DR: Employing a self-compensating chopped comparator structure, the designed oscillator exhibits a significant improvement in the frequency stability and control linearity, at the same time retaining a fast start-up and having a minimal overhead in the power consumption and area.
Abstract: An improved relaxation oscillator core is designed and fabricated in 0.35– $\mu \text{m}$ CMOS process, occupying the area of 0.032 mm2 and consuming around 160 $\mu \text{W}$ while running at 1 MHz. Employing a self-compensating chopped comparator structure, the designed oscillator exhibits a significant improvement in the frequency stability and control linearity, at the same time retaining a fast start-up and having a minimal overhead in the power consumption and area. Measured on 8 test chips, the frequency variation against temperature is ±0.26% in the temperature range from −40 to 125 °C, and the line sensitivity is ±0.08 %/V with the supply voltage changing from 3.0 to 4.5 V. The typical distortion parameters of the control characteristic are HD2 = −61.7 dB and HD3 = −93.2 dB at $\Delta f_{\text {osc}}=500 $ kHz. The measured jitter and phase noise at 10 kHz carrier offset are 235 ppm and −92 dBc/Hz, respectively, while the Allan deviation floor is 15 ppm.

8 citations

Patent
06 May 1987
TL;DR: In this paper, a start-up circuit for a switch mode power supply comprises a relaxation oscillator including an RC charging circuit for developing a trigger voltage for firing a Sidac connected in series with the primary winding of a small ferrite core transformer.
Abstract: A start-up circuit for a switch mode power supply comprises a relaxation oscillator including an RC charging circuit for developing a trigger voltage for firing a Sidac connected in series with the primary winding of a small ferrite core transformer The secondary winding of the transformer is resonated with a tuning capacitor and the voltage coupled to a rectifying circuit for developing a charge across a trigger capacitor When the trigger capacitor voltage achieves a trigger potential, an SCR is fired for starting a pulse width modulator in the switch mode power supply The relaxation oscillator is rendered ineffective by a feedback voltage supplied from the power supply when it starts

8 citations


Network Information
Related Topics (5)
CMOS
81.3K papers, 1.1M citations
84% related
Amplifier
163.9K papers, 1.3M citations
83% related
Transistor
138K papers, 1.4M citations
81% related
Integrated circuit
82.7K papers, 1M citations
80% related
Capacitance
69.6K papers, 1M citations
80% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202322
202242
202128
202044
201962
201855