Abstract: The present invention discloses a dual-band active filter having filtering response and positive pass-band gain. The dual-band active filter includes an input match unit for gain match of the dual-band active filter and for having a band-pass filtering response; a first gain stage electrically connected to the first input match unit for providing the flat gain of the dual-band active filter; an inter-stage unit electrically connected to the first gain stage for matching gain and for having a band-stop filter response; a second gain stage electrically connected to the inter stage unit for providing the flat gain of the dual-band active filter; and an output unit electrically connected to the second gain stage for matching the dual-band active filter and for having a low-pass filtering response.

Abstract: Disclosed is an assembly structure of chip scale package, which can effectively avoid various yield and quality problems resulted from the poor control of epoxy during the process of chip scale package. A buffer zone whose planar size is smaller than that of the chip is disposed on the substrate, and the chip is then affixed to the buffer zone utilizing epoxy. Since the planar size of the buffer zone is smaller than that of the chip, the contamination of golden fingers and bonding pads due to the poor control of epoxy can be avoided, and furthermore the yield problems resulted from failed wire bonding and poor soldering are avoided. The assembly structure can be further applied to vertical stacking of multiple chips. A packaging method for the chip scale package is also provided.

Abstract: The present invention discloses an antenna diversity switch, used for receiving and transmitting RF signals for dual-mode co-existence wireless communication system. The antenna diversity switch comprises a first transmitting port; a second transmitting port; a receiving port; a first control unit, electrically connected between the first transmitting port and a first antenna; a second control unit, electrically connected between the first transmitting port and a second antenna; a third control unit, electrically connected between the second transmitting port and the first antenna; a forth control unit, electrically connected between the second transmitting port and the second antenna; a fifth control unit, electrically connected between the receiving port and the first antenna; a sixth control unit, electrically connected between the receiving port and the second antenna. The antenna diversity switch according to the present invention meets the requirement of IEEE 802.

Abstract: A UV-emitting phosphor comprising SrB4O7:Eu phosphor particles that have been treated to yield a surface layer containing from greater than 0 to about 25 atomic percent aluminum. The holdover stability of the treated SrB4O7:Eu phosphor improves the 100-hour maintenance in a fluorescent tanning lamp to the extent that the treated phosphor may be subject to a holdover period of more than 25 days without a significant change in its 100-hour maintenance.

Abstract: A narrow-band UVB emitting phosphor is described wherein the phosphor has a preferred composition represented by the general formula (Y1-x-y-zGdxCeyPrz)MgB5O10 where x has a value in a range from 0.02 to 0.80, y has a value in a range from 0.01 to 0.97, and z has a value in a range from greater than 0 to 0.05 and x+y+z<1. The phosphor has a narrow emission centered at about 312 nm when excited by radiation from a low-pressure mercury discharge.

Abstract: A method is provided for making narrow-band, UVB-emitting, (Y,Gd,Ce,Pr)Mg borate phosphors. The method involves the use of a mixed oxide co-precipitate which is combined with MgO and boric acid and fired twice to form the borate phosphor. The mixed oxide co-precipitate is formed by dissolving sources of Y, Gd, Ce, and optionally Pr, in an acid solution. Oxalic acid or ammonia is added to the solution (or vice versa) to form a co-precipitate of oxalates or hydroxides that are further fired to obtain a mixed oxide co-precipitate. The use of the mixed oxide co-precipitate improves homogeneity and yields a phosphor having a higher brightness with very little or no sticking between the fired cakes and the firing crucibles.

Abstract: The present invention discloses a dual-band power amplifier, capable of operating at a first frequency and a different second frequency simultaneously. The dual-band power amplifier comprises a first gain stage; a second power stage; an input matching unit electrically connected between the first gain stage and a signal input port; an inter-stage matching unit electrically connected between the first gain stage and the second power stage and an output matching unit electrically connected between the second power stage and an output signal port. According to the dual-band power amplifier and the design formula of matching circuit of the present invention, the present invention can simplify the circuit structure and is suitable for various dual-band communication systems.

Abstract: A self-leveling and balancing vehicle composed of a base and a moving and driving mechanism installed on the base, the mechanism having two longitudinal moving seats installed on the guiding rails fixed on the base, a connecting frame extending to and connecting the two moving seats, and two sector gears installed on the two moving seats. A driving motor and a sensor are installed on the connecting frame, two level driving gears installed on two ends of the driving shaft and engaged with the two sector gears, a balance gear box installed on the driving shaft and having an output shaft extending to the connecting frame, and two driven gears installed on two ends of the output shaft and engaged with the racks fixed on the base.

Abstract: The present invention is a single-component, UV-emitting phosphor having a composition represented by the general formula (Y1?x?y?zLaxGdyCeZ)PO4 where x has a value in a range from 0.001 to 0.98, y has a value in a range from 0 and 0.1, z has a value in a range from 0.01 and 0.2, and x+y+z<1. The phosphor when stimulated by 254 nm radiation emits in both the UVA and UVB regions. The relative balance of the UVA and UVB emissions may be varied by adjusting the relative amounts of Y and La. Brightness can be increased by adding Gd to the composition.

Abstract: A pad backer is described, comprising a backing plate, an elastomer layer and a pad backing ring. The elastomer layer has a bottom surface bonded to the backing plate and an upper surface with a protrudent part at the edge portion thereof. The pad backing ring has an inner bottom surface with a recessed part thereon matching with the protrudent part on the upper surface of the elastomer layer, such that the elastomer layer is fixed onto the pad backing ring through engagement of the protrudent part and the recessed part.

Abstract: A pad backer is described, comprising a backing plate, an elastomer layer and a pad backing ring. The elastomer layer has a bottom surface bonded to the backing plate and an upper surface with a protrudent part at the edge portion thereof. The pad backing ring has an inner bottom surface with a recessed part thereon matching with the protrudent part on the upper surface of the elastomer layer, such that the elastomer layer is fixed onto the pad backing ring through engagement of the protrudent part and the recessed part.

Abstract: An environmental water resource recycling system of the invention comprises pluralities of drainpipes units, which includes pluralities of drainpipes engaged in pluralities of holder holes formed by coupled frame strips, and sealing lids covering the opening at one end of the drainpipes. An instant water-absorbing sand layer is applied on the soil layer exposed on the ground surface before inserting the lower end of the drainpipes held in the drainpipe unit into the sand layer. Concrete is poured onto the ground to be constructed such that the concrete can integrally cover the drainpipe units. The sealing lids can be removed from the openings on the upper end of the drainpipes after the concrete is solidified, thereby accomplishing a permeable paving and instantly draining the rain on the permeable paving to the sand layer and further to the underground for being recycled as water resource for further utilization.

Abstract: A process for preparing particles of zinc sulfide-based electroluminescent phosphor having a moisture resistant coating thereon which comprises the steps of selecting a reaction vessel having a given height and a porous disc at the bottom thereof; charging the reaction vessel with phosphor particles and fluidizing the particles by introducing an inert gas into the vessel through the porous disc; heating the reaction vessel to a reaction temperature; introducing a coating precursor into the reaction vessel at a position adjacent the bottom of the vessel but above the disc; introducing a co-reactant into the reaction vessel at a position substantially mid-way of the given height; and maintaining the inert gas flow, the precursor flow and the co-reactant flow for a time sufficient for a reaction to occur and coat the phosphor with the moisture resistant coating. Apparatus for carrying out the process is also disclosed.

Abstract: A jitter-less phase detector in a clock recovery circuit is disclosed. A first control signal generating circuit generates a first control signal by inverting and delaying input data signals through half clock. A second control signal generating circuit generates a high level second control signal when the data signal changes. A phase comparator generates an up signal having a high-level from the falling edge of the first control signal to the falling edge of the second control signal, and generates a down signal having a high-level from the falling edge of the second control signal to the falling edge of the first control signal, so as to control a pair of current sources to selectively discharge and charge a capacitor.

Abstract: A process for making an electroluminescent phosphor having a given emission spectra A, comprises the steps of manufacturing a beginning electroluminescent phosphor having an emission spectra B, different than A. A coating is applied to the phosphor having the emission spectra B to increase the resistance of the phosphor to the deleterious effects of moisture and change the emission spectra of the phosphor to emission spectra A. The application of the coating includes the steps of reacting a coating precursor with a mixture of oxygen and ozone.

Abstract: A chip-packaging substrate. The substrate is capable of reducing damage during packaging, shrinking its connecting portions so that the length of any of the gap slots between the packaging portion and the frame portion of the substrate is increased. Furthermore, a dummy layer is provided to one surface of the frame portion to flush the surface on the frame portion with that of the packaging portion as much as possible.

Abstract: An image sensor module includes a printed circuit board (PCB) having a window defined therein and extending through the PCB. The inner periphery of the window is coated with a shelter. The PCB includes multiple leads formed thereon around the window and each lead divided into an inner lead and an outer lead. An image sensing chip is electrically connected to the PCB and includes multiple solder pad formed thereon. Each solder pad aligns with and electrically connected to a corresponding one of the inner leads. A lens set is mounted on the PCB and includes a holder surrounded the window and corresponding to a sensing area of the image sensing chip, wherein the peripheries between the holder, the PCB and the image sensing chip are underfilled with stabilizer to form an airtight condition between the holder, the PCB and the image sensing chip.

Abstract: A process for preparing particles of zinc sulfide-based electroluminescent phosphor having a moisture resistant coating thereon which comprises the steps of selecting a reaction vessel having a given height and a porous disc at the bottom thereof; charging the reaction vessel with phosphor particles and fluidizing the particles by introducing an inert gas into the vessel through the porous disc; heating the reaction vessel to a reaction temperature; introducing a coating precursor into the reaction vessel at a position adjacent the bottom of the vessel but above the disc; introducing a co-reactant into the reaction vessel at a position substantially mid-way of the given height; and maintaining the inert gas flow, the precursor flow and the co-reactant flow for a time sufficient for a reaction to occur and coat the phosphor with the moisture resistant coating. Apparatus for carrying out the process is also disclosed.

Abstract: This invention relates to a self-leveling and balancing vehicle which is composed of a base and a moving and driving mechanism installed on the base, wherein the moving and mechanism having two longitudinal moving seats installed on the guiding rails fixed on the base, a connecting frame extending to connect the two moving seats and two sector gears installed on the two moving seats. A driving motor and a sensor are installed on the connecting frame, two level driving gears being installed on two ends of the driving shaft and engaged with the two sector gears, a balance gear box being installed on the driving shaft and having an output shaft extending to the connecting frame and can be rotated freely, further two driven gears being installed on two ends of the output shaft and engaged with the racks fixed on the bas.

Abstract: The locking device for a detachable skate of sports shoe in accordance with the present invention mainly comprises a rotatable hook, an elastic member, a lever and an engaging wall. The rotatable hook is provided on the detachable skate being adapted to releasably engaging with the engaging wall provided under the sports shoes. The elastic member is provided to bias the rotatable hook and the lever is used to rotate the rotatable hook for assembling or disassembling by means of overcoming bias force of the elastic member.