Abstract: A motor stator 400 is integrated with a position sensor 200 through a novel attachment ring 600. Electrical connection to the integrated device is through terminals 202, 210 that pass through the position sensor housing 250. The stator 400 is preferably overmolded, though other suitable forms of encapsulation are contemplated. The attachment ring 600 is preferably ultrasonically bonded to the sensor 200 during manufacture, prior to insertion of the motor armature 430. Other methods of attachment arc contemplated, and various types of motors and sensors are also contemplated.

Abstract: A membrane potentiometer that uses magnets to keep the membranes separated. A controller has a backplate and a cover that has sidewalls and a top wall which has a central opening defining a cavity. The cover mounts to the backplate. A pair of membrane potentiometer are interposed between the cover and the backplate to receive a first voltage, and output a second voltage that is a percentage of the first voltage. A pair of magnet assemblies are located on outer surfaces of the membrane potentiometer to generate a magnetic repulsion force to keep the membrane potentiometer separated from each other.

Abstract: A partially interdigitated combline ceramic filter is provided. The filter has a filter body with top, bottom, and side surfaces, and metallized through-holes defining quarter-wavelength resonators. The filter also has a metallization layer and at least one combline section with at least one transmission zero between the quarter-wavelength resonators. The filter also has at least one interdigital section and a coupling means between the quarter-wavelength resonators of the interdigital section. The filter also has first and second input-output pads. The partially interdigitated combline ceramic filter has the best attributes of both interdigital filter designs and combline filter designs to provide a filter which has transmission zeros, superior stopband rejection, and good harmonic performance in a small, compact, low-profile package that does not require external shielding.

Abstract: A method (100) for mechanically tuning a VCO that has a resonant stripline having vias in predetermined locations connected through a circuit board to ground. This includes a step (104) of measuring the operating frequency of the VCO. A following step (106) includes calculating an amount of frequency shift needed to achieve a desired frequency. A following step (108) matches the amount of frequency shift needed to values in a look-up table of frequency shifts versus via locations to determine which vias locations will provide the proper amount of frequency shift. A last step (110) includes mechanically disconnecting from ground the via locations indicated in the third step such that the desired frequency is achieved. This method (100) of tuning allows VCO frequency adjustment after final assembly avoiding problems of frequency shifts that can occur due to the placement of a metal lid on the circuit board after assembly.

Abstract: The present invention relates to an improvement pen-case device comprising a front clamp cover and a rear clamp cover, according to above architecture user not only could lay aside each kind of pens, but also lay up paper that could be more convenient to user for easy reading and operation. If add a magnet into present invention, it could absorb the scattered paper clip and pin; moreover, user also could put the clamp body at any absorbent place for flexible usage, meeting multi-purpose needs.

Abstract: An angular sensor has a shaped dual magnet structure carried upon a pole piece having a generally "c" shaped cross-section. The magnet and pole piece define a generally circular linear field which is concentric about the axis of rotation of the complete rotor. A Hall effect device is inserted into the open portion or gap between the two magnets and is exposed to a well defined field. Through the use of particular magnet materials and a magnet geometry extending from the axis of rotation to a point well beyond the Hall sensor, a precise and yet tolerant magnetic circuit is produced.

Abstract: A two-phase electro-mechanical stepper motor having 1) a high ratio of torque per mass and torque per power draw, to be able to develop required rotating torque, 2) a magnetic circuit that allows developing of a significant holding torque while using a limited amount of electric power, and 3) two disk rotors positioned on either side of the stator with aligned poles. The actuator has a shaft extending into the actuator, and a first and second rotor, each fixedly mounted on the shaft, and each having a permanent magnet mounted thereon in opposing fashion. Additionally, there is a stator, loosely mounted around the shaft and positioned between the opposing permanent magnets, and having at least a first and second pole extending toward the first and second rotors respectively.

Abstract: A linear slide selector switch for multiple channels for selecting between several switch positions. Specifically, there is a housing having a hinged door with a latch lock, the door rotates to a closed position and is held in a closed position by the latch lock. The housing also contains a slide and a printed circuit board. The printed circuit board has rows of contacts. A contactor is mounted to the slide. As the slide is moved linearly, electrical connections are made and broken on the printed circuit board.

Abstract: A resistor network for terminating active electronic devices has low cross talk noise between the adjoining resistors and the conductors that connect the resistors to other electronic packages. A substrate has a top and a bottom surface. Resistors are located on the top surface. Conductors are also located on the top surface and are electrically connected to each end of the resistors. Vias extend through the substrate and electrically connect to the conductors. Solder spheres are positioned on the bottom surface and are electrically connected to the vias. An end of each of the resistors is electrically connected in common through a common conductor. The commoned resistors are electrically connected to a common via through the common conductor. The resistor network minimizes cross talk noise between the resistors and provides a high density interconnection.

Abstract: A sensor is provided with a conductive sensing element that has a composition adapted to provide a resistance large enough that predetermined magnitudes of voltage noise do not create a false indication of removal, e.g. by abrasion or corrosion. Also, the sensing element composition is adapted to provide a temperature coefficient of resistivity small enough that measurements are substantially independent of temperature. Resistance is preferably greater than 10 ohms and the absolute value of TCR is preferably less than 1000 parts per million per .degree. C. The conductive sensing element may be formed from several materials, including alloys of palladium or lead, particularly palladium-gold, lead-bismuth, or lead-palladium. A combination sensor is provided that includes an abrasion sensing element and a corrosion sensing element on the same substrate.

Abstract: A temperature compensated crystal oscillator with an improved phase noise characteristic and a fast start up time includes a large time constant low-pass filter coupled to a temperature compensation circuit. At start up the low pass filter is effectively bypassed to enable the temperature compensation voltage and oscillator output frequency to settle quickly. A capacitance in the low-pass filter is precharged by a precharge circuit to match the temperature compensation voltage without disturbing the temperature compensation circuit and the concurrent settling of the oscillator. When the capacitance is fully charged, the low-pass filter is enabled without unsettling the oscillator output frequency.

Abstract: A piezoelectric resonator (10) includes a single crystal elongated plate (12) having a transverse extensional mode of oscillation. Two sets of split electrodes (20,22,30,32) are provided on the surfaces (14,16) of the plate (12) to define two acoustically coupled oscillating regions (24,26) therebetween. The oscillating regions (24,26) present a similar inductance and have similar performance to allow the use of the resonator (10) in a double-ended electrical transformer circuit (100). An AC source (112) drives non-opposing top and bottom electrodes of the resonator (110). The remaining electrodes are coupled with shunt capacitors to provide two resonant LC circuits with the resonator (110) so as to provide a voltage gain for driving a load.

Abstract: A method for packaging an acoustic wave device (10) without contaminating an active area (12) disposed on a face (14) thereof, including steps of: providing a substrate with a top (30) having conductive pads (18), bonding stud bumps (20) to a periphery (22) of the face (14) of the acoustic wave device, disposing a dam (26) onto the top (30) of the substrate and inside of the location of the conductive pads (18), aligning and connecting the stud bumps (20) to the conductive pads (18) on the top of the substrate to form electrically conductive interconnections between the acoustic wave device (10) and the substrate (16), flowing an underfill material (28) at the periphery (22) of the acoustic wave device and around the interconnections such that the underfill material (28) stops at a boundary (32) defined by the dam (26), and curing the underfill material (28) to mechanically reinforce and protectively encapsulate the interconnections.

Abstract: A pointing stick for controlling the positioning, movement and operation of a cursor on the display screen. Strain gages 30 are mounted on the sides of the stick 12 and are made of pressure sensitive strips 32, for electrically changing the resistance of the material in response to the amount of strain applied thereto. A conductive contact bridge 34 for electrically connecting the two strips 32, and conductive contact pads 36 for making electrical contact to electronic circuitry (not shown) are also mounted on the sides of the stick 12. The stick 12 extends through a hole 38 in the base 4 in a Z-axis oriented direction 39, and is held in place by an adhesive bond epoxy 40. Cable 18 is positioned within cavity 16 and adhesively bonded to the cavity wall via adhesive 42. Cable 18 has electrical traces 44 and input/output (I/O) pads 46 mounted thereon. Contact pads 36 are bonded to I/O pads 46 by any suitable bond material 50.

Abstract: A dual in line switch apparatus selects between several switch positions. A housing has several slides. A row of terminals is attached to the housing. A contact sheet is located between the slides and the terminals. The contact sheet operates, as the slide is moved, to make and break electrical connections between the terminals. The contact sheet includes a flexible film having a contact pad and a detent notch and an adhesive tape that is attached to the flexible film. The tape has a slot formed therein and the contact pad is pressed through the slot by the slide to electrically connect with the terminals. The switch provides electrical contacts that are sealed from detrimental environmental effects. The detent notch provides a positive mechanical stop with tactile feedback for each of the switch positions. An alternative embodiment uses another flexible film with conductive vias that connect to solder spheres.

Abstract: A position sensor for sensing the position of an attached device. There is a housing having terminals and a cover attached to the housing. Resistors, conductors and conductive traces are located on the cover and electrically connected to the terminals. A rotor is positioned between the housing and the cover, and has a contactor mounted thereon for contacting the resistor and the conductor such that as the rotor rotates a resistance value indicative of the sensor position is varied. The cover has a terminal insert which connect between the conductive traces and the terminals. A leaf spring rotates the rotor back to a starting position.

Abstract: A variable resistance control device and switch has a base, made of insulating material, a rheostat, mounted to the base, and a switch, mounted to the base. The rheostat includes a variable resistor trace, positioned on the base, a collector trace, positioned on the base next to and insulated from the variable resistor trace. The rheostat includes an actuator, slidably coupled to the base, for sliding over a length of both the variable resistor trace and the collector trace to make electrical contact therebetween. The rheostat also includes a first set of contacts, that are 1) electrically coupled during operation of the rheostat, and are 2) electrically isolated during operation of the switch; and a second set of contacts, that are 1) electrically isolated during operation of the rheostat, and are 2) electrically coupled during the operation of the switch.

Abstract: A ceramic filter with recessed shield 200 is provided. Filter 200 contains a filter body with a block of dielectric material having a top surface 202, a bottom surface 204, and side surfaces 206, 208, 210 and 212 respectively. Filter 200 also has a plurality of metallized through-holes 214 extending from the top surface 202 to the bottom surface 204 defining resonators. Each of the resonators has a corresponding plurality of embedded receptacles 220, which contain an unmetallized area therein, adjacent to the plurality of metallized through-holes 214, providing a ring of isolation 222. A recessed channel 224 extends perpendicularly across each of the plurality of embedded receptacles 220 and has a groove 226 therein which is complementarily configured to receive a metallic shield 228. The metallic shield 228 is disposed in the recessed channel 224 and is connected to the metallization layer of the plurality of embedded receptacles 220.

Abstract: An extremely reliable and effective position sensor is provided at low cost for determining the relative position of a mechanical linkage with respect to a reference point. The position sensor includes a rotor or bracket which is mechanically coupled to the linkage and contains at least two magnets on opposite walls adjacent a channel opening. The opposing magnets are formed with first and second sloped or ramped sections which produce produce variable magnetic fields as determined by the geometric profile of the magnets. One or more detectors are positioned in the air gap between the opposing magnets. As the linkage is moved, the rotor or bracket moves with respect to the detector causing a change in the strength of the magnetic field detected by the detector, whereby the detector determines the position of the movable linkage.

Abstract: A ceramic transverse-electromagnetic-mode filter having a resistive paste base and resistive paste layer and method of tuning same is provided. The ceramic filter includes a filter body (200) comprising a block of dielectric material and having top (202), bottom (204) and four side surfaces (206, 208, 210, 212) including vertical edges (214). The filter also has metallized through-holes providing transverse-electromagnetic-mode resonators (210). At least one vertical portion in proximity to the vertical edges (214) of the block on at least one of the side surfaces is unmetallized providing a resistive paste base (218). A resistive paste layer (219) of predetermined resistivity is deposited thereon. The resistive paste layer attenuates a set of parasitic spurious responses in the filter frequency response curve while simultaneously maintaining a desired transverse-electromagnetic-mode passband.