Abstract: A frequency provided to power a cold cathode fluorescent light (CCFL) circuit is based on a duty cycle of a driving waveform to the CCFL circuit, wherein the duty cycle of the driving waveform is approximately 50%.

Abstract: Control circuitry is used to provide a uniform temperature distribution between multiple power supplies on a chip which drive a single load. The power supplies each include a MOSFET with a source to drain path connecting VDD to the single load. The control circuitry includes a bipolar diode placed close to the MOSFET in each power supply unit, each diode providing a voltage varying inversely proportional to temperature changes resulting from power dissipated by its respective MOSFET. The control circuitry further includes components in each power supply unit to provide the voltage from the bipolar diode with the lowest voltage (or highest temperature) on a bus external to the power supply units. The bus voltage is then examined in the control circuitry in each of the power supply units and if the bipolar diode voltage in a unit is equal to the bus voltage, that unit does not increase current from its respective MOSFET to the load since it has the highest temperature.

Abstract: An integrated circuit chip with multiple switching element segments that cooperatively provide high power switching is provided with circuitry for isolating each individual switching element segment. The individual isolation of switching element segments enables bond wire continuity testing.

Abstract: A monolithic power control circuit is disclosed that includes a switching element and a control circuit that senses a voltage drop across the switching element and that adjusts a duty cycle of the switching element. The monolithic circuit includes a compensation circuit that adjusts a contribution of the sensed voltage drop across the switching element in response to temperature changes of the switching element.

Abstract: An ESD protection circuit, suitable for use as part of an integrated circuit, limits the voltage potential at the contacts of the integrated circuit to a voltage potential difference range relative to, though extending beyond the voltage source potentials of the circuit protected. The ESD protection is effective regardless of whether the integrated circuit is powered. The ESD protection circuit includes a clamp subcircuit for limiting the voltage potential at a clamp point to a first voltage range approximately defined by the voltage source potentials and a voltage offset subcircuit, coupled between the clamp point and an integrated circuit contact, to establish a second voltage range encompassing the first voltage range. The voltage offset subcircuit conducts current between the clamp point and the contact to limit the voltage potential at the contact to the second voltage range.

Abstract: Disclosed is a real-time method for minimizing the expected, controllable unit cost over a future drilling interval by simulating the values of selected operating variables and lithologies.

Abstract: Disclosed is a real-time method for determining when a drill bit that is being used in drilling operations should be replaced, given the objective of minimizing the total expected, controllable costs of a well. The basis of the bit replacement decision is a direct comparison of the total expected, controllable unit cost of the current bit in the borehole to the total expected, controllable unit cost of a replacement bit over a specified interval of analysis.

Abstract: Disclosed herein is a conductive polymeric coating having a charge density of greater than about two which, after being applied to a nonconductive substrate, allows overcoating of that substrate by electrostatic spraying. Exemplary of the conductive polymeric coatings useful herein are those based upon quaternized homopolymers or copolymers of dimethyldiallylamine.

Abstract: This invention involves a unique wood and furniture coating composition comprising about 50 to about 85% by weight of an acrylated cellulosic, about 15 to about 45% by weight of an acrylated oligomer about 0.1 to about 10% by weight of a ultraviolet photoinitiator and sufficient solvent to render the resulting solution handleable under processing conditions. The resulting coating may be applied by a unique process that involves spraying the coating over a base coated wood substrate, flashing the solvent off, rubbing, sanding or otherwise processing the coating and then ultraviolet curing the coating by subjecting the coating to ultraviolet curing conditions. The resulting coating possesses excellent cured state film properties and good chemical resistance. Its film properties are at least equivalent to prior art cellulose nitrate coatings but it is far superior to these coatings in terms of its chemical and water resistance.

Abstract: A bow sight particularly suited for use on bows wherein the draw rating and hence arrow trajectory may be varied. A base of the sight has a forward extension on which is pivotally mounted a carrier having a sighting post. The base extension also supports a bridge having an inclined surface provided with elevation indices visible to the archer during aiming of the bow. The base extension and the carrier jointly provide stop means to retain the carrier and its sighting post in a selected elevation setting. A stop element is positionable within one of a series of recesses in the base extension corresponding to the bow draw rating. The stop element is sequentially engageable with a multitude of radially grooves formed in the carrier. Vertical adjustment of the carrier is through an arc the magnitude of which arc and the distance between carrier elevational settings being determined by the distance of the stop element from the carrier pivotal axis.

Abstract: An adjustable current mirror, responsive to a single polarity balance control signal that may be derived using feedback, is described. The current mirror amplifier comprises first means for providing a first current path, the first means including reference transistor means for providing a current level control signal, issued relative to a reference potential, that corresponds to the current level of the first current path, second means for providing a second current path, the second means including current control transistor means for controlling the current level of the second current path, the current control transistor means being responsive to the current level control signal, and adjust transistor means, provided in series with the reference transistor means in the first current path, for adjusting the current level control signal by effectively modifying the reference potential, seen by the first means, in response to the balance control signal.

Abstract: Method and apparatus are disclosed for spraying water-borne emulsion topcoat finish materials with gloss and clarity equivalent to solvent-based topcoat materials irrespective of ambient conditions. One or more secondary water atomizing sprays are positioned laterally of the primary emulsion spray nozzle to lay down a mist layer underneath or on top or, preferably, both underneath and on top of the emulsion topcoat layer to retard premature coalescence of the emulsion particles thus permitting release of air bubbles entrained in the emulsion film during the spraying process. The water mist spray is preferably not intermingled with the emulsion spray in the space between the spray nozzles and finish surface but kept close enough to the emulsion spray to avoid significant coalescence of the emulsion film before the entrained air bubbles are released.