Relaxation oscillator

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

A 0.4-V 0.93-nW/kHz Relaxation Oscillator Exploiting Comparator Temperature-Dependent Delay to Achieve 94-ppm/°C Stability

Abstract: This paper presents the analysis and design of a relaxation oscillator that counteracts the complementary-to-absolute-temperature (CTAT) property of the comparator delay with the proportional-to-absolute-temperature (PTAT) property of the RC core to realize temperature-stabilized operation By using a feedback bias network to linearize the comparator CTAT delay, thus improving the overall temperature stability by 20 $\times $ , this technique enables a comparator with ~20 $\times $ less bandwidth and an overall oscillator with ~5 $\times $ lower power than conventional approaches In a 018- $\mu \text{m}$ silicon on insulator CMOS process, this design consumes 114 nW from a 04-V supply operating at 122 kHz, with a temperature coefficient (TC) as low as 40 ppm/°C ( $\mu = 94$ ppm/°C for $n = 5$ ) achieving state-of-the-art efficiency (093 nW/kHz) for kilohertz-range relaxation oscillators

An on-chip CMOS relaxation oscillator with power averaging feedback using a reference proportional to supply voltage

Abstract: Recently, on-chip reference oscillators are required for low-cost single-chip applications including biomedical sensors, microcomputers, high-speed interfaces such as DDR I/F and HDMI (for initial negotiation), and SoCs. RC oscillators (including relaxation oscillators) were developed to realize on-chip oscillators with standard CMOS processes. In this paper, a power-averaging feedback (PAF) concept for accurate oscillators with low power and small area is presented.

Finding downbeats with a relaxation oscillator

Abstract: A relaxation oscillator model of neural spiking dynamics is applied to the task of finding downbeats in rhythmical patterns. The importance of downbeat discovery or 'beat induction' is discussed, and the relaxation oscillator model is compared to other oscillator models. In a set of computer simulations the model is tested on 35 rhythmical patterns. The model performs well, making good predictions in 34 of 35 cases. In an analysis we identify some shortcomings of the model and relate model behavior to dynamical properties of relaxation oscillators.

Dynamics of mobile coupled phase oscillators

Abstract: We study the transient synchronization dynamics of locally coupled phase oscillators moving on a one-dimensional lattice. Analysis of spatial phase correlation shows that mobility speeds up relaxation of spatial modes and leads to faster synchronization. We show that when mobility becomes sufficiently high, it does not allow spatial modes to form and the population of oscillators behaves like a mean-field system. Estimating the relaxation timescale of the longest spatial mode and comparing it with systems with long-range coupling, we reveal how mobility effectively extends the interaction range.

A new low-noise 100-MHz balanced relaxation oscillator

Abstract: A novel fully balanced architecture for high-frequency, low-noise relaxation oscillators is presented. Differential operation is achieved with the use of two grounded capacitors utilizing the circuit parasitics. Bypassing of the regenerative memory function in the oscillator benefits both high-speed and low-noise operation. A detailed analysis of phase noise in relaxation oscillators is performed. Results obtained from a test chip have verified the viability of the new oscillator and the developed phase-noise theory. The oscillator circuit has been realized in a medium-frequency (f/sub tau /=3 GHz) bipolar process. The tuning range extends to 150 MHz. At an oscillation frequency of 115 MHz, measured phase noise was -118 dBc/Hz at 1-MHz distance from the carrier. >