Contributors:L.-E. Wernersson, M. Ärlelid, M. Egard, E. Lind
Measured and simulated output power spectrum for the oscillators at Vg=0V and Vc=1.0V (left). The fundamental oscillation is at 15.71GHz. The bias stability diagram of the oscillator (right).
... Measured oscillationfrequency as a function of gate bias at Vc=2.4V. The arrows indicate the two sweep directions.
... Measured oscillator output power for varying DC gate biases. The squares represent the fundamental oscillationfrequency, the circles the 2nd harmonic and the stars the 3rd harmonic oscillation.
... Measured performance operating the oscillator as a mixer.
... Measured (circles) and simulated (squares) oscillationfrequencies for different wave-guides specified in Table 1. The data points for D are solid while C are open.
Contributors:Yoshihiro Maegaki, Imad Najm, Kiyohito Terada, Harold H Morris, William E Bingaman, Norimasa Kohaya, Atsumi Takenobu, Yoko Kadonaga, Hans O Lüders
Cortical distributions of SEPs and high-frequencyoscillations to median nerve stimulation in Patient 5. (A) Typical high-frequencyoscillation potential recorded at electrode A5. (B) The location of recording electrodes. (C) Cortical distributions of the SEPs and high-frequencyoscillations. P20/N20 are distributed diffusely around the primary hand sensorimotor area, while P25 is elicited in a restricted cortical area. Most oscillation potentials show a cortical distribution similar to that of P20/N20. Two later oscillations (n21 and p22) are elicited in a restricted cortical area similar to P25.
... Typical examples of high-frequencyoscillations to median nerve stimulation recorded with a restricted bandpass filter of 500–2000 Hz compared with SEPs recorded with a wide bandpass filter of 30–2000 Hz. The SEPs and high-frequencyoscillations were recorded at the same precentral electrodes (A1 in Patient 2 and A5 in Patient 5). Note the better isolated oscillation potentials on restricted filtering as a result of the attenuation of slower SEP components. Most of the oscillation potentials can be identified with both bandpass filters. p22 can only be seen on restricted bandpass filtering in Patient 2. The latencies of oscillations differed by 0.11 ms for the two different bandpass filters.
... Clinical and imaging characteristics of 8 patients for whom high-frequencyoscillations were evaluateda
... Cortical distributions of SEPs and high-frequencyoscillations to median nerve stimulation in Patient 7. (A) Typical high-frequencyoscillation potential recorded at electrode C1. (B) The location of recording electrodes on the 3-dimensional MRI reconstruction. (C) Cortical distributions of the SEPs and high-frequencyoscillations. Most oscillation potentials are distributed similar to or more diffusely than P20/N20. Three later oscillations (n18, p18 and n19) are elicited in a restricted cortical area similar to P25.
... High-frequencyoscillation... The locations of the subdural electrode array and functional brain mapping in each patient. SEPs and high-frequencyoscillations were recorded from the electrodes enclosed by solid lines. Electrodes A7 and C4, and A4 were not used for recording because of disconnection of the wires in Patients 5 and 7, respectively. CS, central sulcus.
Contributors:Z.K. Peng, Z.Q. Lang, S.A. Billings, Y. Lu
The output frequency response of a nonlinear system.
... The restoring force of a bilinear oscillator.
... The output frequency response of a linear system.
... Bilinear oscillator... The polynomial approximation result for a bilinear oscillator
... Nonlinear output frequency response function... Bilinear oscillator model.
Dominant frequency... The first and the second dominant frequencies variation with the steam mass flux.
... The first and the second dominant frequencies variation with the water temperature.
... The dominant frequency regime map.
... Pressure oscillation... Frequency spectrums of pressure oscillation at different water temperatures and steam mass flux.
... The dominant frequencies in different measurement points by Qiu et al. .
Contributors:Miha Furlan, Eugenie Kirk, Alex Zehnder
Top: Relaxation oscillations during a SINIS detector 6keV X-ray event (the detector replacing Rb). The amplitude modulation and sinusoidal oscillation are due to the externally applied band-pass filter. Bottom: Time sequence of inverse oscillation periods, equivalent to a time-dependent fr, extracted from the above analog signal (note the larger time scale, while the arrow indicates the range of the top graph). Circuit and device parameters were: L=48nH, Rs=91mΩ, Ic=7.28μA(κ=8).
... Relaxation oscillations... Analog-to-frequency converter
Contributors:Muhammad E.S. Elrabaa
The DRO's output waveforms with and without device mismatch between the two oscillators.
... The DRO's characteristics (period/frequency versus control word) using the two control methods.
... Power consumption of the DRO; power increases as frequency decreases.
... Digitally-controlled oscillator (DCO)... DCO's frequency characteristics. Code words 0–30 represent the basic DRO range. Other ranges are obtained through division with a 3-bit counter.
... Conventional techniques for implementing DCOs. (a) A digital oscillator based on shunt MOS capacitors, (b) a digital oscillator based on current starving, and (c) a digital oscillator based on path selection.
Contributors:George F. Beard, Michael J. Griffin
Roll transmissibility of the foam cushion during exposure to roll oscillation and roll-compensated lateral oscillation at 0.1, 0.2, and 0.4 m s−2 r.m.s. at frequencies from 0.25 to 1.0 Hz. Median values from 20 subjects.
... Lateral transmissibility of the foam cushion during exposure to lateral oscillation, roll oscillation, and fully roll-compensated lateral oscillation at 0.1, 0.2, and 0.4 m s−2 r.m.s. at frequencies from 0.25 to 1.0 Hz. Median values from 20 subjects.
... Effect of magnitude of oscillation on the roll velocity measured at the seat-body interface with the foam cushion during exposure to lateral oscillation and roll oscillation at frequencies between 0.25 and 1.0 Hz. Median values from 20 subjects.
... Root-sums-of-squares of frequency-weighted measured components at the seat-body interface during lateral oscillation, roll oscillation, and fully roll-compensated lateral oscillation on a rigid seat and on a foam cushion. Components weighted using axis multiplying factors and asymptotic weightings extrapolated horizontally at frequencies less than 0.5 Hz without band-pass filtering (BS 6841, 1987). Median values from 20 subjects.
... Percentages of subjects reporting discomfort localised at the ischial tuberosities when sitting on the rigid seat and on the foam cushion during exposure to lateral oscillation, roll oscillation, and fully roll-compensated lateral oscillation across all frequencies.
Contributors:Hung-Chun Chien, Chih-Yen Chen
Sinusoidal oscillator... Simulation results of the start-up oscillations of the variable frequency dual-mode sinusoidal oscillator (Fig. 4).
... Circuit diagram of the proposed DVCCTA-based variable frequency dual-mode sinusoidal oscillator.
... Variation of the oscillationfrequency against R2 for the circuit (Fig. 3).
... Simulation results of the highest applicable oscillations of the variable frequency dual-mode sinusoidal oscillator (Fig. 4): (a) output waveform in the steady state; and (b) the start-up of the oscillations.
... Oscillationfrequency against the bias current IB of the circuit shown in Fig. 4.
Contributors:R. Zelmann, F. Mari, J. Jacobs, M. Zijlmans, F. Dubeau, J. Gotman
Diagram of the MNI detector. (A) baseline detector. (B) HFOs detection in channels with baseline. (C) HFOs detection in channels with continuous high frequency activity. If more than 5s/min of baselines are found, HFOs are detected with respect to the baseline segments (B). If less than 5s/min of baseline were detected, HFOs are detected with respect to the entire EEG segment in an iterative way (C). WE: wavelet entropy; Rxx: autocorrelation; th: Threshold.
... High frequencyoscillations... Histogram of peak frequencies of FRs not occurring with ripples. Out of the 7994 PosAnd HFOs, 554 corresponded to FR that did not co-occur with a visually marked ripple. The peak frequencies of these events included not only the 250–500Hz band but also the 80–250Hz band. All these events were visually marked as FR using a high-pass filter at 250Hz. Two examples are presented. Top: FR with a peak frequency at 150Hz; Bottom: FR with a peak at 265Hz. The unfiltered EEG, the filtered EEG above 80Hz and the filtered EEG above 250Hz are shown. The oscillations become visible only when filtering above 250Hz.
Contributors:Hojat Ghonoodi, Hossein Miar-Naimi, Mohammad Gholami
Plot of oscillationfrequency versus the number of stage for sinusoidal case. Vbias=0.7, Iss=[0.6_1mA], Wn/L=7/0.18, Wp/L=10/0.18.
... Plot of oscillationfrequency versus resistor load for sinusoidal case. N=3, Wn/L=[4/0.18_10/0.18], Cl=[67.5fF_87fF], Iss=1mA.
... The chain of delay stages in (a) a single-ended ring oscillator and (b) a differential ring oscillator.
... Ring oscillators... Plot of oscillationfrequency versus the number of stage for exponential case. Vbias=0.7, Iss=[0.6_1mA], Wn/L=15/0.18, Wp/L=10/0.18.
... Plot of oscillationfrequency versus external capacitor for exponential case. N=3, Wn/L=15/0.18, RL=1.5k, Iss=1mA.