Relaxation oscillator

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

Hysteresis Circuit Without Static Quiescent Current

Abstract: A hysteresis circuit including a comparator and capacitive voltage divider circuit. The capacitive voltage divider circuit includes a first capacitor coupled between an input terminal and a positive comparator input, a second capacitor coupled between ground and the positive comparator input, and a third capacitor coupled between the comparator output and positive comparator input. A reference voltage is applied to the negative comparator input. The comparator is powered by the input signal provided on the input terminal. When the voltage on the positive comparator input is less than the reference voltage, the third capacitor is effectively coupled in parallel with the first capacitor. When the voltage on the positive comparator input is greater than the reference voltage, the third capacitor is effectively coupled in parallel with the second capacitor.

Multi-band frequency oscillating device

Abstract: Oscillating device comprising several oscillators (OSC1, OSC2), each oscillator comprising a capacitive inductive resonant circuit (L 1 & C1, L2 & C2) and a flow-through conduction circuit (G1, G2) having a negative flow-through conduction, the inductive elements of the oscillators being mutually coupled. Each oscillator also comprises a controllable switch (INT 1, INT2) arranged in order to short-circuit or not short-circuit the capacitive element of the oscillator (C1, C2) and in that the device also comprises controllable commutating means (STOP1, ST0P2) arranged to activate one oscillator at a time.

Resonator configuration for the suppression of relaxation oscillations in a long-pulsed Nd:YAG laser.

Abstract: A resonator configuration which couples out the Gaussian TEM00 mode was demonstrated to suppress low-frequency relaxation oscillations in the output from a long-pulse Nd:YAG laser. Experimental measurements of the spatial and temporal beam quality, the spectral bandwidth, and the depth of amplitude modulation were made for this and several other Nd:YAG laser resonator designs. The result of these measurements indicates that this resonator configuration can be used to generate a high-quality (TEM00) long-pulse laser output which is nearly free from relaxation oscillations.

Overdissipation protection circuit for a semiconductor switch

Abstract: An overdissipation protection circuit for a semiconductor switch is disclosed in which the switch circuit is converted into a relaxation oscillator when the current drawn by the load exceeds a predetermined value. Dissipation in the switch semiconductor is reduced because it remains on only for a brief period of time during the relaxation oscillator cycle. If the current drawn by the load exceeds a second predetermined value, the semiconductor switch is turned off. The protection circuit is automatically reset when the relaxation oscillator reaches an on state and the current drawn by the load does not exceed the predetermined value.