The generation of additional interface traps in the pinch-off region and the threshold voltage shift due to hotelectron stressing have been shown to cause 1-3 orders of magnitude increase in the flicker noise density. This flicker noise “overshoot” can easily degrade the performance/resolution of analog circuits by 6-18dB. An improved flicker noise model which is capable of accurately predictin...

1. For the phototropic reaction of bees, the stimulating effects of two illuminated fields differing in intensity and area become equal when the product of area and intensity is the same for both fields. 2. The effect of two areas differing in size and flicker frequency is the same for the bee, when the product of area and flicker frequency is equal for both fields. 3. If two patterns of the sa...

The visibility of stimuli flickering at low temporal frequencies was studied with images viewed normally and when stabilized by a new technique (bleached-window stabilization) that produces perfectly stabilized images without attachment to the eye. Contrary to expectation, sensitivity to low-frequency flicker was higher in the stabilized than in the unstabilized case. Several controls exclude t...

In certain circumstances, superimposed interharmonics in the supply voltage can lead to oscillating luminous flux and cause light flicker. This phenomenon can be observed with filament lamps as well as with fluorescent lamps. Different items are dealt with in this paper: § Presentation of some experimental results: determination of the sensitivity curves for different types of lighting devices,...

PURPOSE To determine the mean critical fusion frequency and the short-term fluctuation, to analyze the influence of age, gender, and the learning effect in healthy subjects undergoing flicker perimetry. METHODS Study 1--95 healthy subjects underwent flicker perimetry once in one eye. Mean critical fusion frequency values were compared between genders, and the influence of age was evaluated us...

Amblyopia ex anopsia is characterized by a defect in visual acuity of one eye, beginning in infancy, often with strabismus. The amblyopia disappears upon occlusion of the dominant eye in children, but not readily in adults. Peripheral acuity and sensation remain normal in field and threshold studies. It is believed that the origin of the amblyopia is in the macular projection of the visual cort...

This paper proposes a new method of monitoring and analyzing voltage flicker based on wavelet packet transform and virtual instrument, and establishes an arithmetic model of the system. First, through the wavelet package transform, we can extract the amplitude modulation waveform, get the accurate time when the voltage flicker occurs and stops, and count the frequency and amplitude of voltage f...

A method is described for predicting whether a visual display terminal (VDT) will appear to flicker given the display phosphor persistence, refresh frequency, luminance and other environmental factors such as the distance between the user and the VDT. Based on research on human temporal sensitivity (Kelly 1969), one can predict the maximum screen luminance and the minimum refresh frequency that...

A psychophysical function, believed to reflect receptive field-like properties, is described. It is based on the determination of the critical flicker fusion frequency (CFF) of a tiny test target, centered on a round background of fixed luminance, the size of which is varied as the test parameter. Under optimal conditions, the maximal obtained frequency difference is 10 Hz. This function is com...