A stimulus generator comprising a single-shot pulse generator, a measuring resistor, a differential amplifier, and a gated comparator to identify the moment of onset of a mismatch between the patterns of current and voltage variation in the output electric signal, this mismatch being caused by the onset of a thermal breakdown in the circuit under test.

In one embodiment, a method is provided. In the method of this embodiment, a stimulus signal set may be generated and supplied, as input, to first circuitry. Each respective stimulus signal in the stimulus signal set may be generated based at least in part upon a respective non-null subset of an input signal set. No two respective stimulus signals in the stimulus signal set may be generated based upon the same respective non-null subset of the input signal set. The stimulus signal set may includ...

An improved bi-stimulus print is disclosed which provides more faithful rendition of the colors perceived therein. One perceives color in an image recorded on a bi-stimulus print by illuminating the front of the bi-stimulus print with light having one wavelength distribution and by simultaneously illuminating the back with light having another wavelength distribution and viewing, together, an image conveyed from the front by reflected light and another image conveyed from the back by transmitted...

A deflector, through which a subject views a target or visual stimulus, can independently move the visual stimulus horizontally and vertically to stimulate or compensate the subject's eye movement and can alter the optical distance to stimulate or compensate accommodation (focus). The target is projected on the subject's eye by way of two mirrors serially disposed in the projecting path and mounted for rotation about vertical and horizontal axes, respectively. Lens elements produce an undistorte...

A device that produces a first response when its operator has successfully matched a pair of specific stimuli from a plurality of stimuli available for matching, and a second response when the selected stimuli are not a match. The stimuli available for matching are grouped into two (2) separate and distinct groupings, and one of said groupings is sub-divided into a plurality of sets. Both groups of stimuli are encoded in BCD form. All of the sets in said sub-divided group of stimuli are stored i...

A contactless stimulus transducer which induces a stimulus current into a living system by means of a changing magnetic field which is produced by an electric field winding on a ferro-magnetic core which consists of two similarly or nearly similarly shaped pole pieces whose lateral boundary surfaces have equidirectional curvatures and whose concave sides face each other.

Optimization of test stimulus verification by analyzing test stimulus timing information against restriction rules derived from a static analysis of a digital system. The result of this analysis is used to determine test stimulus timing which cannot cause a timing violation and to remove the associated vectors from further checking. Only those vectors which can violate timing constraint rules are checked individually to find states which violate the timing rules.

A hand-held instrument for electrically stimulating tissue of a living body in the presence of body fluid comprising an elongated, relatively fine, electrically conductive wire having a planar conductive surface generally transverse to the axis thereof at one end. Insulation carried flush to the tip of the wire is provided along the peripheral surface of the wire to prevent shunting of electrical stimulus by the body fluid through such surface. A tube encases the insulated wire in a manner such ...

Herein is disclosed a method, system, and apparatus for dettering theft of portable electronice devices. A portable electronic device is rendered incapable of properly operating after being powered down, without at least some exposure for some time to a given stimulus during a subsequent power-up sequence. A source of the stimulus is provided within a locality from which the devices are not to be removed. Transmission of the stimulus is limited to a region of space within the locality.

A polymeric solution capable of gelling upon exposure to a critical minimum value of a plurality of environmental stimuli is disclosed. The polymeric solution may be an aqueous solution utilized in vivo and capable of having the gelation reversed if at least one of the stimuli fall below, or outside the range of, the critical minimum value. The aqueous polymeric solution can be used either in industrial or pharmaceutical environments. In the medical environment, the aqueous polymeric solution is...