Relaxation oscillator

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

Seismic system for real-time reporting

Abstract: A seismic system for real-time directional reporting for providing radio signals indicating the direction and location of traffic along a path wherein two geophones positioned adjacent said path and spaced from each other are each connected to separate channels each of which includes amplifier means coupled to an integrator capacitor which in turn is coupled to a trigger circuit whereby the signals developed by the geophone are converted to a sharp trigger pulse. The output of each channel is coupled through a diode to a one-shot multivibrator whose output is coupled to a transistor switch in series with the emitter circuit of a transistor audio frequency oscillator and power supply whereby when a trigger pulse from either channel is applied to the one-shot multivibrator the audio frequency oscillator is activated for the period of the one-shot multivibrator. The trigger pulses of the channels are also connected to the inputs of a flip-flop which is set by one channel and reset by the other. The output of the flip-flop is coupled to a transistor switch in series with an astable multivibrator and the power supply whereby said astable multivibrator may be activated when the transistor switch is enabled by the flip-flop.

Voltage-controlled oscillator and electronic device using the same

Abstract: A voltage-controlled oscillator includes a varactor diode which is a capacitance element coupled to a resonance circuit. A control voltage is applied to one end of the varactor diode and the output voltage of a variable DC voltage source which is capable of changing a voltage value stepwise is applied to the other end of the varactor diode via a voltage divider. Accordingly, the voltage-controlled oscillator can be operated as a local oscillator used for two communication systems. Further, a switching element is not required and thus deterioration in the characteristics caused by a reduction in the Q factor of the resonance circuit can be prevented. In addition, the power consumption does not increase.

Reservoir Computing using High Order Synchronization of Coupled Oscillators

Abstract: We propose a concept for reservoir computing on oscillators using the high-order synchronization effect. The reservoir output is presented in the form of oscillator synchronization metrics: fractional high-order synchronization value and synchronization efficiency, expressed as a percentage. Using two coupled relaxation oscillators built on VO2 switches, we created an oscillator reservoir that allows simulating the XOR operation. The reservoir can operate as with static input data (power currents, coupling forces), as with dynamic data in the form of spike sequences. Having a small number of oscillators and significant non-linearity, the reservoir expresses a wide range of dynamic states. The proposed computing concept can be implemented on oscillators of diverse nature.

A low noise current-controlled oscillator with high control linearity

Abstract: The noise performance of a current-controlled oscillator is presented in this paper. The relationship between the noise of the comparator reference voltage and the oscillator timing jitter is discussed. The R-S trigger in the oscillator is used to store the circuit state but limits the speed of the circuit and increases the timing jitter. The current source keeps charging the timing capacitor when the capacitor is discharged, which increases the circuit power dissipation. Several improvements on the oscillator have been suggested to overcome these problems. The new oscillator can operate in high speed with low timing jitter and good control linearity.