Abstract: A wireless communication device (10) is provided for maintaining acceptable acoustic coupling, increasing display and data input device capability and increasing antenna performance to encourage further miniaturization and weight reduction thereof. Two moveable housing portions (12) and (14) are moveable between a closed (18) and an open (20) housing position and matively engage to provide an expandable housing while aligning earpiece (26) and microphone (28) transducers on a center axis (30) of the device (10). Paging and radiotelephone functions of the device are configured responsive to the position of the housing portion (12). The housing portion has a lens for viewing a display (46) thereunder and keycaps for actuating a keypad (54) thereunder when the housing portion (12) is in the closed housing position (18). An antenna (56) is extendable beyond the moveable housing portion (12).

Abstract: The data bus interface apparatus (243) which interfaces between one of a plurality of peripheral units (111) and a data bus (109). The data bus interface driver (243) is capable of biasing data to the voltage level of the data bus (109), accepting data signals (233) having different amplitudes and is immune to differences in ground voltage potentials caused by induced noise and differing environmental conditions. The data bus interface driver (243) is capable of data transition rates in excess of 1 MHz and has low EMI and RFI emissions.

Abstract: A radome (310) made of a cylindrical tube sealed on a first end and open on a second end houses a multiple-arm antenna element (405). The radome is formed with at least two grooves (340, 350) on an inner surface of the cylindrical tube for meshing with arms (410, 420, 430, 440) of the multiple-arm antenna element (405).

Abstract: In a computer system with a RISC processor (14) using 32-bit instructions, certain instructions are stored in 16-bit compressed form and expanded for use by the processor, reducing their fetch time. An instruction is extracted from memory (via bus 10) via a set of buffers (11-1 to 11-4) which are loaded sequentially with 8-bit or 16-bit words. The instruction format includes a condition field in ins first word, defining the conditions for executing the instruction. An NV (=Never) code in that field indicates that the instruction is not to be executed; this code (which is not normally utilized) issued to identify compressed instructions. A compressed instruction detector unit (18) expands the compressed instruction; and the detector (18) controls a multiplexer (13) to pass either expanded instructions therefrom or full-length instructions direct from the buffers (11-1 to 11-4) to the processor (14). A packer state machine unit (17) terminates the fetching of the instruction once its 16 bits have been fetched.

Abstract: An electronic device, such as a radiotelephone, is connectable to a variable-level power source. The electronic device includes a rechargeable power source which is repowered responsive to application of operative power generated by the variable-level power source. The electronic device provides a constant charge current regulator for converting operative power of a constant voltage into operative power of a constant current to be applied to the rechargeable power source to recharge the rechargeable power source. The constant charge current regulator is made up of a series connected diode and resistor pair. According to a further aspect of the invention, when the rechargeable power source becomes fully recharged, application of the operative power can be reduced.

Abstract: A radiotelephone (303) comprises a plurality of subscriber identities (306-308) operative in a radiotelephone system (300) at the same time. The radiotelephone network (301) processes incoming and outgoing calls for the radiotelephone (303) using any one of the subscriber identities (306-308). A standard telephone interface (401) optionally provides communications between the radiotelephone (303) and one or more standard telephone sets (413-415) using any one of the subscriber identities (306-308). A method for operating the radiotelephone (303) is also disclosed.

Abstract: Bit-serial digital filters use numerous flip-flops, which must be reset to a known, all-zero state for testing and start-up purposes. A method for setting a bit-serial digital filter to an all-zero state uses non-resettable flip-flops, which eliminates the increased gate count and current drain overhead of resettable flip-flops. A bit-serial digital filter is constructed using non-resettable flip-flops such as simple non-resettable D flip-flops. When a reset signal is initiated, a reset controller (350) sends an all-zero signal to reset gates (301, 321) positioned at the input to the digital filter and in each feedback loop or unit-delay path. Meanwhile, a bit-serial controller (250) cycles through its control signals to emulate the operation of the bit-serial filter. In two word cycles, each flip-flop in the digital filter will be set to a known, all-zero state, and the all-zero signal is removed to allow normal operation of the filter.

Abstract: A user performs a manual selection or a gesture selection of a screen object (210, 220, 230) on a screen (150) of an electronic device (100) using a pointing device (190). After a manual selection, such as a single tap, the electronic device (100) automatically presents a temporary directional palette (450) having palette buttons (451, 452, 453, 454, 455) that explicitly state functions of the electronic device (100). Each palette button has a unique compass direction relative to the original tap area. By making a second tap on a desired palette button, a novice user learns available functions of the electronic device (100) and their corresponding directional gestures. Alternately, the user may perform a gesture selection of both a screen object and a function, such as making a double tap or drawing a line in the appropriate direction, before the directional palette appears on the screen (150).

Abstract: A portable cellular radiotelephone (100), which is powered by main and auxiliary batteries (101, 102) in an operating state. The main and auxiliary batteries (101, 102) include respective memories (402, 410) for storing a 64- bit registration number and 1024 bits of data for identifying the type and brand of such batteries. Memories (402, 410) store a laser-engraved 64-bit registration number and 1024 bits of data. In order to uniquely identify the batteries (101, 102), the 64-bit registration number includes a twelve-bit brand code having a predetermined brand code value and an eight-bit type code having a predetermined type code value, and the 1024 bits of data include a unique multi-character message. By identifying the unique brand code, type code and multi-character message when a battery is inserted into portable device (100), it can be insured that the portable device (100) will be operated with a reliable and safe battery. Otherwise, the portable device is turned off and the battery is not charged.

Abstract: A cellular radiotelephone or MS (100) includes an international mobile station identification including a mobile country code MCC, a mobile network code MNC, an area code MIN2 and a local number MIN1, all of which are stored in the EEPROM memory (124) of the MS. In the IMSI signaling system, a unique MIN1 coded number in the IMSIQ field of access and order messages is used to identify an IMSI access message from an IMSI MS or an IMSI order message from an IMSI base station or BS. In receiving order messages, an IMSI MS first looks for its MIN1, and if not found, then looks for unique MIN1 coded number in the IMSIQ field. If the unique MIN1 coded number is detected, the IMSI MS then looks for MIN1 in the last word of the message.

Abstract: A shielding assembly (102) for shielding an electronic circuit (108) disposed on a substrate (107) includes traces (118) and a shield (200). The traces (118) are disposed on the substrate (107) about the electronic circuit (108). The shield (200) includes leads (214, 218) for attachment to the traces (118). The shield (200) is attached to the traces (118) such that some of the leads (218), which are staggered, attach to the traces (118) in a nonconsecutive manner. An additional shield (201) including alternately staggered leads (222) can be adjacently attached to the previously attached shield (200). This is accomplished by attaching the alternately staggered leads (222) of the additional shield (201) to those traces that are between the traces attached to the previously attached shield (200).

Abstract: An electronic device coupling apparatus is used to couple two electronic devices through a hinge. A first electronic device (221) is disposed within the main housing of a radiotelephone (101). The second electronic device (301) is disposed within a movable element (103) of the radiotelephone (101). The coupling apparatus uses a piece of flex (215) which is torsionally twisted upon the opening of the movable element (103) of the radiotelephone (101). Additionally, the flex (215) is coupled to the electronic devices (221, 301) using an elastomeric connector (217).

Abstract: A transmitter (107) includes amplifying circuitry (203) and control circuitry (215, 217, 219) for biasing the amplifying circuitry (203) so that it operates closer to saturation with increased efficiency. The gate voltage signal (213), which provides a gate bias, is coupled to the amplifying circuitry (203) and is dynamically varied by the processor circuitry (219) in response to the value of the amplifier control voltage (211) coupled to the amplifying circuitry (203). The amplifier control voltage (211), which has a value for maintaining the output power of the amplifying circuitry (203) at a constant, is produced by the integrating circuitry (217) in response to a comparison of the detected power output signal (216) produced by the detecting circuitry (215) and the power output control signal (218) produced by the processor circuitry (219).

Abstract: A RF communication device (100, 200, 300) employs a mirrored surface (109, 209, 309). The mirrored surface (109, 209) contains a display area (108, 208) that may be used to output operational information of the RF communication device (100, 200), such as signal strength and status information, to a user.

Abstract: A transmission line coupler (115) for a transmitter output signal (123) generated by an RF signal amplifier (103) includes a through-path transmission line (201) and a coupled-path transmission line (202) electromagnetically coupled thereto by multiple serpentine-like portions (such as portions 641, 642, 643 and 644 in FIG. 6), which are disposed on opposite sides of the through-path transmission line (201) for enhancing coupling sensitivity and eliminating degradation in the amount of coupling due to variations in the transmission line plating registration. Offset portions (641, 643) on one side of the through-path transmission line (201) provide substantially the same amount of coupling as the offset portions (642, 643) on the other side of the through-path transmission line (201).

Abstract: A communication system comprised of a transceiver (101) for transmitting and receiving data signals and a modulation/demodulation apparatus (102) to modulate the data signals from an accessory (109) for transmission and demodulate data signals after reception by the transceiver (101). A processing device (103) controls power to the various components of the communication system.