Abstract: An accessory connector assembly comprises a connector housing (102, 104), an electrical connector (106) and a circuit substrate mounted horizontally within the connector housing, and an actuator (110). The electrical connector has a cantilevered latch member (124) which is used to engage a latch feature (504) of an accessory port (502) on a communication device (500). The electrical connector is connected to the circuit substrate, upon which circuit components (136) are disposed. The circuit substrate is connectable with an external cable (506). To release the accessory connector assembly from the communication device, the actuator is pressed downwards. Vertical cantilevered actuator arms are urged inwards against the cantilevered latch members to disengage them from the communication device.

Abstract: A mobile station (100) maintains a preferred bandmap (106) and a fixed bandmap (104). Upon powering up the mobile station, the mobile station begins scanning frequencies listed in the preferred bandmap. The strength of each detected carrier signal is measured, and the mobile station connect to the serving cell having the strongest carrier signal. The preferred bandmap is maintained by placing the frequency of the most recently connected serving cell at the head of the list, and moving other frequencies down the list as other are added or rotated to the top of the list.

Abstract: A transmitter has a loop switch (132) and a feedback switch (127), which are operated by a control circuit (134). An unamplified value is obtained by connecting a cartesian demodulator (126) with the input to a power amplifier (118), applying a fixed baseband signal level to the input of the cartesian modulator, and measuring the output level of the cartesian demodulator. An amplified value is obtained by connecting the output of the power amplifier to the cartesian demodulator, again applying a fixed baseband signal level, and measuring the output of the demodulator. The amplified and unamplified values are compared by the control circuit, and the power amplifier gain is adjusted by varying the gain adjust signal (138), if necessary.

Abstract: In a charging system having a battery (104) with a high rate protection switch (120), and a charger (102) having a disable switch (221) that cooperates with a control switch transistor (224) to alternatively enable and disable the high rate protection switch, a method is employed by the charger to determine the presence or absence of the high rate protection circuit and apply an appropriate charge regime. The method includes applying a test current, then measuring the battery voltage while trying to disable the high rate protection circuit. If the voltage is sufficiently higher during such time, compared to normal operation, then the battery is charged at an ultrafast rate.

Abstract: An active circuit includes an amplifying transistor (102), a voltage reference (208), and an active bias circuit. The active bias circuit controls the operating point of the amplifying transistor, and includes a bias transistor (224) which is controlled by the voltage reference and the collector current of the amplifying transistor. As the temperature of the amplifying transistor changes, the tendency of the collector current to change is counter-acted by the bias transistor and the voltage reference.

Abstract: A capacitor (14) is disposed in, for example, a ferrite shell (12). A winding (20) is formed around the shell, thereby providing an inductive component. Additional windings may be provided to form a transformer. In combining the two components into a unitary package, a space savings is realized, and assembly efficiency is increased.

Abstract: A power source (10) , preferably in the form of a battery pack, comprises a battery (14), an electrochemical capacitor (16), and a switch bridge (18). The capacitor increases the power delivery capability of the battery for periodic power bursts, increases it's life, and is electrically connected in parallel with the battery through a number of switches. The switch bridge is used to periodically reverse the orientation of the capacitor with respect to the battery to alleviate electrical stress on the capacitor.

Abstract: A tracking circuit for a power supply comprises an inverter (68), a summing network (70), and a driver circuit (72). The inverter inverts a feedback voltage, which is a variable load voltage level, about an inverter reference voltage level to provide an inverter output voltage level. The inverter output voltage level is summed or averaged with the output voltage of the power supply with respect to the voltage of the return line (54) to provide a summing voltage. The driver circuit signals the primary control circuit (35) to adjust the power supply output voltage level so that the summing voltage is held constant and equal with a driver reference voltage level.

Abstract: Frequency mismatch between the carrier oscillator (18) of a radio transmitter (10) and a local oscillator (44) of a radio receiver is eliminated. The transmitter generates a mismatch correction signal (54), modulates it with the carrier, and transmits to the receiver. The receiver demodulates the received signal and generates a pulse train (52) having a duty cycle indicative of the frequency deviation. A digital logic unit (42) calculates the magnitude and direction of the frequency deviation, and adjusts the local oscillator to match the carrier frequency.

Abstract: Labels (12) are disposed on a carrier strip (10), which is routed from a feed reel (22), over a guide (24), idlers (26 & 28), through a printer (30), over a peeler plate (32), and to a pick-up reel (34). The labels are cleaned of dust prior to printing by effectively rolling an adherent surface (36) over the printing surface (14) of each label as it moves past the guide.

Abstract: A battery packaging system (10) packages a battery cell or cells (26) in a housing member (12). A clip (14) is used to retain the battery cells in the housing member, and has cantilevered clip fingers (32) which engage openings (22) formed on the rim (20) of the housing member. The clip compressionally or resiliently engages the battery cells, so that they are tightly held in the housing, by retaining fingers (40) formed in the retaining surface (28) of the clip. A cap (16) may be attached to the clip, and provides a peripheral skirt (54) which covers the openings so that the clip is not removable.

Abstract: A light pipe assembly (10) for an electrical device comprises a holder (12) made of a compliant material, and light pipes (14) which transmit light. The light pipes are seated in channels (16) formed in the holder. The holder has compressible ridges (22) formed on the portion of the holder where light enters (18). The light pipe assembly is seated in the device such that the light receiving face (34) of each light pipe is in proximity to a surface mounted LED (50). The compressible ridges keep light from bleeding from the LED to adjacent light pipes and compensates for the slight variations in dimensions between the housing (42) and the circuit board (44) of the device. The top portion (30) of each light pipe protrudes above the holder and through openings in the housing so that the signal of the LED can be seen.

Abstract: A battery pack (12) comprises current sensor (28) for sensing the charge current through a battery cell (26), and generating a DC voltage which is sensed by a charger (14). The charger can then provide an output current that satisfies both the need for a constant charge current through the battery cell or cells, and the varying current demand of a load (10). Additionally, the battery pack may include a switch (34) for removing the current sensor from the discharge path of the battery cell or cells and the load when the battery pack is not connected to the charger.

Abstract: A method for making high power electrochemical capacitors provides for depositing an electrically conducting polymer (20) (22) onto a non-noble metal substrate (10) which has been prepared by coating with an adhesion enhancing material (16) (18). Using the method, high power, high energy devices may be fabricated by arranging a plurality of individual capacitor cells into a stacked, bipolar device.

Abstract: A leaded component (10) is provided with first and second leads (14 & 16). The leads are formed with stopping deviations (26 & 28) which prevent the leads from being inserted into a circuit board (38) beyond the stopping deviations. The leads may also be provided with retaining deviations (34 & 36) which function to retain the component on the circuit board. Further, the stopping deviations may be formed so as to indicate the polarity of a component, and finally, the stopping deviations may be provided with mounting portions (50 & 52) so that the leaded component may be surface mounted on a circuit board (54).

Abstract: A reduced noise power converter is provided with a transformer having primary, secondary, and auxiliary windings (22, 24, and 46). An electrostatic shield (26) having a shield termination (32) is disposed between the primary and secondary windings. The auxiliary winding has the opposite polarity of the primary winding, and is coupled between the shield termination and the input voltage source (12). By appropriate selection of the number of turns of the auxiliary winding, noise coupled from the primary side to the secondary side through the stray device capacitance (34) is neutralized.

Abstract: An electrical device (40) has a contact (58) for electrically interconnecting with a second device. The contact (58) is disposed on a rib (60) extending downward from the top of an upper housing (42) of the electrical device. The contact (58) has a cantilevered arm extending from a downward portion (68), and terminates in a contact head (78) which extend upwards through an opening (56). The downward portion (68) of the contact (58) has a contact point (72) for contacting an exposed conductor (50) deflectably mounted on a printed circuit board (46), which is disposed in a lower housing (44). When the upper and lower housings (42) and (44) are assembled together, the contact point (72) is pressed against the exposed conductor (50), deflecting it, and forming a gas tight solderless electrical connection.

Abstract: The power delivery of an energy source (10) is enhanced by a dual function circuit. The circuit utilizes a storage capacitor (32) to store a voltage higher than the source voltage by transferring charge from the energy source to the storage capacitor between current pulses (16), than transferring charge from the storage capacitor to the load during current pulses. This is achieved by the novel combination of a boost converter (40) operating in conjunction with a buck converter (45).

Abstract: A lithium ion battery is provided with an overvoltage switch (12) and an overvoltage control circuit (14). The overvoltage control circuit causes the overvoltage switch to open, thus disconnecting the battery from a charger, upon the battery voltage reaching a first predetermined level when charged by a charger not designed to charge a lithium ion battery. However, when the battery is connected to an appropriately designed charger, the battery receives an input signal through an input terminal (24) which causes the overvoltage control circuit to open the overvoltage switch at a higher second predetermined level, should the appropriately designed charger fail to enter voltage regulation when the battery voltage reaches the first predetermined level.