Patents Examined by Peter S. Wong
  • Patent number: 6384578
    Abstract: The minimum transmit battery voltage (Vtx min) of a radio operating in a TDMA mode of operation or the stand-by battery voltage (Vstd-by) of the radio operating in a GSM mode of operation can be determined as a function of the combination of an in-slot transmit battery voltage (Vin-slot), an out-of-slot transmit battery voltage (Vout-slot), a stand-by compensation factor (&Dgr;sb), and a compensation factor (K). The stand-by compensation factor (&Dgr;sb) is related to a difference between the out-of-slot transmit battery voltage (Vout-slot) and a stand-by battery voltage (Vstd-by). The compensation factor (K) has a first value for the TDMA mode of operation and a second value for the GSM mode of operation. Each value of compensation factor (K) is related to the manner in which the radio utilizes battery power during transmission in the TDMA or GSM modes of operation.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: May 7, 2002
    Assignee: Motorola, Inc.
    Inventors: Joseph Patino, Alexander Rodriguez, Charles Cole, William F. Pence, Jr.
  • Patent number: 6384584
    Abstract: The PMOS transistor M1 is controlled by a time constant circuit 2 having a second resistor R2 and a capacitor C1 which are provided between a collector of the PNP transistor Q1 and the ground, and a hysteresis comparator 3, to which a voltage obtained by the time constant circuit 2 is applied, for controlling a gate of the PMOS transistor M1.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: May 7, 2002
    Assignee: NEC Corporation
    Inventor: Kazuhiro Sugano
  • Patent number: 6381114
    Abstract: A circuit for supplying power to an intrinsically safe circuit having a power supply and output terminals includes an integrated current source feedback and current limiting element. Voltage limiting circuitry between the power supply and the output terminals limits the voltage across a load. Current limiting circuitry includes barrier resistors which convert current to voltage for input to an operational amplifier comparing a reference voltage with the voltage level representing the load current and providing a control input signal to a transistor for limiting a current applied to the load.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: April 30, 2002
    Assignee: Micro Motion, Inc.
    Inventor: William M. Mansfield
  • Patent number: 6380710
    Abstract: A photovoltaic-charged secondary battery device has a cylindrical core, a flexible photoelectric transducer sheet extractably rolled on the core, a chargeable/dischargeable storage battery, and a control circuit for controlling the charging and discharging operations of the storage battery. The photovoltaic-charged secondary battery device with the photoelectric transducer sheet fully rolled on the core generally exhibiting a substantially cylindrical form. The photovoltaic-charged secondary battery device further has a polymeric cover film formed on the light-receiving surface of the photoelectric transducer sheet. The polymeric cover film improves the durability of the photoelectric transducer sheet against repeated bending and sliding actions caused on the photoelectric transducer sheet. The photoelectric transducer sheet may be so arranged that, when the photoelectric transducer sheet is rolled on the core, the light-receiving surface faces outward of the roll.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: April 30, 2002
    Assignee: Sony Corporation
    Inventors: Haruo Watanabe, Ritsuko Inoue, Koichiro Hinokuma, Tomikazu Watanabe, Hiroshi Miyazawa
  • Patent number: 6381151
    Abstract: A high efficiency switching controller for use in a switching power supply (SPS) includes a current control device coupled to a voltage source of the SPS and a switch connected between the current control device and an output voltage circuit of the SPS. An under voltage lockout regulator coupled to the output voltage circuit of the SPS and the switch controls the state of the switch based on a voltage of the output voltage circuit and a bias unit coupled to the under voltage lockout regulator provides current to circuitry within the switching controller based on the voltage of the output voltage circuit. A protector within the high efficiency switching controller provides a control signal to the pulse width modulator unit to control the gate drive signal in response to an operating condition of the switching controller.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: April 30, 2002
    Assignee: Fairfield Korea Semiconductor Ltd.
    Inventor: Kyung-Oun Jang
  • Patent number: 6380716
    Abstract: In a preferred embodiment, a method of condition monitoring of an opportunity charged battery, including: determining length of time the battery has been off-line; determining whether charging of the battery has occurred during the length of time; if step (b) results in a determination that the charging of the battery has occurred, determining degree of charging of the battery occurring during the length of time; and if step (b) results in a determination that charging of the battery has occurred, resetting a condition monitor associated with the battery to reflect the degree of charging of the battery.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: April 30, 2002
    Assignee: Curtis Instruments, Inc.
    Inventor: Eugene P. Finger
  • Patent number: 6380712
    Abstract: A self-contained emergency battery charger for use in motor vehicles for charging a fully or partially discharged starter storage battery which delivers current to a starter motor of the vehicle. The batter charger contains a preconditioning circuit to preconditions a discharged battery before applying a full charging current from a charged second battery to the discharged battery. The battery charger also contains a temperature circuit which adjusts the time of charging whereby the time for providing power from the second battery is increased or decreased in relation to the second battery's temperature.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: April 30, 2002
    Inventors: Kenneth C. Murphy, Curtis Quinter
  • Patent number: 6380722
    Abstract: A method for limiting a switching current and limiting a voltage drop across a circuit includes the steps of limiting a current sent from a power source to a switching device during a turn on time of the switching device by disposing an inductor device in series between the power source and said switching device and returning flux energy stored in said inductor device to the power source during a turn off time of the switching device.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: April 30, 2002
    Assignee: Intel Corporation
    Inventor: Robert D. Wickersham
  • Patent number: 6377023
    Abstract: The charging control system for a battery of rechargeable electric storage cells, and in particular for a lithium battery, including cells connected in series which are adapted to be connected to a common electrical power supply. The system includes individual cell charging control units each of which is equipped with means adapted, in operation, to be connected to the power supply to take the energy necessary for charging a cell and which itself provides all of the operations for charging that cell using the energy thus taken.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: April 23, 2002
    Assignee: Alcatel
    Inventor: Antoine Capel
  • Patent number: 6377022
    Abstract: A rechargeable coffee or spice grinding apparatus having a grinder and a charging station. The grinder is hand portable and useable separated from the charging station. The grinder has a power supply (e.g., a battery pack) that is recharged by a current induced in the grinder's charging circuit by the inductance probe of the charging station. The charging station is cordless and plugs directly into a household wall outlet. The charging station has an inductively coupled charging probe that mates with a probe receptacle in the grinder. The charging probe induces an electrical current in the charging circuit of the grinder without any wires or direct electrical contact between the grinder to the charging station. The grinder's charging circuit connects to the rechargeable power supply and provides the electricity to operate the grinder motor.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: April 23, 2002
    Inventor: Theodore Rhoads
  • Patent number: 6377432
    Abstract: A fuse is melted and cut off when an overcurrent flows through the fuse. The fuse has a different thermal expansion coefficient metal laminate obtained by laminating a plurality of different thermal expansion coefficient metal plates. When the fuse is melted and cut off by heat of the overcurrent, a mechanical deforming force is applied to a melting portion of the fuse. The mechanical force is caused by the difference between thermal expansion coefficients of the different thermal expansion coefficient metal plates.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: April 23, 2002
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Hisashi Hashimoto
  • Patent number: 6376935
    Abstract: A method, and a corresponding device, for controlling a power switch in a system with variable structure includes at least a switch capable of being actuated to deliver a given electric signal corresponding to an electric system, based on a control signal taking into account a reference input signal and a feedback signal sampled at the electric system output. The method applies to the control signal an oscillation at a controllable frequency, resulting from the application of a filtering on the feedback signal, the filtering being defined in such a way as to induce a phase shift of −180° between the filtered feedback signal and the electric system input signal, to the controllable frequency.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: April 23, 2002
    Assignee: Ecole Superieure Atlantique d'Ingenieurs en Genie Electrique, ESA Igelec
    Inventors: Jean-Claude Le Claire, Joseph Saillard, Sami Siala, René Le Doeuff
  • Patent number: 6377029
    Abstract: A portable, rechargeable device for boost-charging a discharged target battery is equipped with current sensing and regulation circuitry. The device may be used, for example, for boost-charging through a cigarette lighter socket or directly. Such circuitry permits very rapid charging using voltages greater than the nominal voltage of the target battery without blowing a fuse of the cigarette lighter socket or damaging sensitive onboard electronics.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: April 23, 2002
    Assignee: Vector Manufacturing, Ltd.
    Inventors: Michael Krieger, Jack Robert Colton, Henry Shum
  • Patent number: 6377024
    Abstract: A system (10) and method (100) for charge and discharge equalization of a lithium-ion battery having a plurality of cells (12) in series. A central charge controller (16) and a central discharge controller (22) command a rate of charge to individual charge controllers (14) associated with each cell (12) of the battery for maintaining equalized charge at each cell (12) of the battery. The charging and discharging is initiated upon sensing a predetermined maximum charge threshold voltage (104) and a predetermined minimum discharge threshold voltage (114) at each cell in the series of cells.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: April 23, 2002
    Assignee: The Boeing Company
    Inventor: Winnie W. Choy
  • Patent number: 6373731
    Abstract: A power inverter using a voltage driven switching element, capable of suppressing an excessive surge voltage which is generated on high-speed switching of IGBTs or MOSFETs, and suppressing radio frequency oscillation after the suppression of the surge voltage. The power inverter includes a switching element rendering a power path conducting and non-conducting, and a speeding-up circuit of a feedback path in an active clamping circuit added to the switching element.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: April 16, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Iwamura, Hideki Miyazaki, Katsunori Suzuki, Junichi Sakano, Mutsuhiro Mori, Koji Tateno
  • Patent number: 6373223
    Abstract: In a voltage equalizing apparatus for battery devices, wherein each of a plurality of closed circuits is constituted of each of a plurality of battery devices interconnected in series on a secondary side, each of a plurality of secondary windings magnetically coupled with each other, and each of a plurality of switching devices on the secondary side, wherein a closed circuit is constituted of a battery device on a primary side, a primary winding magnetically coupled with the secondary windings in common, and a switching device on the primary side, and wherein the plurality of switching devices on the secondary side and the switching device on the primary side are alternately switched ON and OFF, thereby equalizing the output voltages of the plurality of battery devices interconnected in series on the secondary side; the ON operation of the plurality of switching devices on the secondary side is continued until after the completion of release of exciting energy stored in a transformer.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: April 16, 2002
    Assignees: Nagano Japan Radio Co., Ltd., Fuji Jukogyo Kabushiki Kaisha
    Inventors: Seiichi Anzawa, Hiroshi Nishizawa, Fujio Matsui
  • Patent number: 6373226
    Abstract: The discharge method discharges a plurality of serially connected rechargeable batteries, wherein the remaining charge in each discharging rechargeable battery is detected, and a battery with the lowest remaining charge is designated a low charge rechargeable battery. The plurality of serially connected rechargeable batteries are discharged while supplying battery voltage stepped down from the output voltage of the serially connected rechargeable batteries to the low capacity rechargeable battery.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: April 16, 2002
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tsukasa Itou, Satoshi Narukawa
  • Patent number: 6373149
    Abstract: A power system for controlling power to low voltage CMOS circuits. The power system can be used in circuits having a low voltage supply and a high voltage supply, wherein the low voltage supply powers low voltage circuit components and the high voltage supply powers high voltage circuit components. The power system comprises a first switch coupled between the low voltage supply and the low voltage circuit components, a second switch coupled between the low voltage circuit components and a circuit ground, and a power control circuit coupled to the high voltage supply and the circuit ground and having a control output coupled to the first and second switches, wherein when the control output is in a first state the low voltage supply and the circuit ground are connected to the low voltage circuit components and when the control output is in a second state the low voltage supply and the circuit ground are disconnected from the low voltage circuit components.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: April 16, 2002
    Assignee: Elbrus International Limited
    Inventors: Andrew V. Podlesny, Alexander V. Malshin
  • Patent number: 6373674
    Abstract: A primary winding of a first insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an input terminal, and windings of a noise eliminating transformer are provided within balanced lines on the side of a secondary winding of the first insulating transformer. A primary winding of a second insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an output terminal, and balanced lines on the side of the secondary winding of the second insulating transformer is connected to the noise eliminating transformer. One end of each of the primary windings, which is grounded to the ground line, is connected to the middle point of the secondary winding of each insulating transformer.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: April 16, 2002
    Assignee: Masprodenkoh Kabushikikaisha
    Inventors: Toshihiro Sugiura, Masanari Hiramatsu, Hiroshi Matsubara
  • Patent number: 6369548
    Abstract: A voltage switch-over device comprises a first power rectifier, a second power rectifier, and a charger, the first power rectifier being connected to the charger. Mains leads connect the charger to a power supply, and a mains evaluation unit is coupled to the charger, the mains evaluation unit switchably connecting the second power rectifier to the power supply and to two consumers consisting of balanced primary modules activating at least one transformer. There is a first connection including a capacitor between the positive potential of the first power rectifier and the negative potential of the second power rectifier, and a second connection includes a capacitor between the negative potential of the first power rectifier and the positive potential of the second power rectifier, a respective one of the capacitors being arranged in an independent current circuit supplying a respective one of the consumers. A control device is connected to the consumers.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: April 9, 2002
    Assignee: Fronius Schweissmaschinen Produktion GmbH & Co. KG
    Inventors: Friedrich Oberzaucher, Georg Krenhuber