Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8174243 | Power supply controller and method therefor In one embodiment, a switching controller uses an auxiliary winding voltage of a transformer to form a signal representative of current flow through a secondary winding of the transformer. The controller is configured to limit a current through a secondary winding t... | 05/08/2012 |
| 8089251 | Battery charging control circuit The present disclosure provides a battery charging control circuit. The charging control circuit includes: a constant-current charging unit and a trickle charging unit. The charging control circuit further includes a branch switch, a control unit, and a detection un... | 01/03/2012 |
| 8085001 | Battery charging control circuit The present invention provides a charging control circuit for a rechargeable battery. The charging control circuit includes: a constant-current charging unit and a trickle charging unit. The charging control circuit further includes a branch switch, a detection swit... | 12/27/2011 |
| 8035355 | Charge-controlling semiconductor integrated circuit Disclosed is a charge-controlling semiconductor integrated circuit including: a current-controlling MOS transistor; a current detection circuit including a 1/N size current-detecting MOS transistor; and a gate voltage control circuit, wherein the current detection c... | 10/11/2011 |
| 7923972 | Systems and methods for charging a battery with a digital charge reduction loop Exemplary systems and methods for charging a battery with a digital charge reduction loop are described herein. In some embodiments, a system comprises an exemplary digital charge reduction loop which comprises a circuit for determining a charge-current adjustment s... | 04/12/2011 |
| 7880445 | System and method of charging a battery using a switching regulator In one embodiment the present invention includes a system and method of charging a battery using a switching regulator. In one embodiment, a switching regulator receives an input voltage and input current. The output of the switching regulator is coupled to a batter... | 02/01/2011 |
| 7843174 | Constant voltage to constant current transferring controller A constant voltage to constant current transferring controller includes a voltage signal transferring circuit, a current signal transferring circuit, and an error amplifier. The voltage signal transferring circuit receives a voltage detecting signal and a first refe... | 11/30/2010 |
| 7782022 | Input source detection for a battery charger A system and method for determining if a USB port can source sufficient current to charge a rechargeable battery at a predetermined peak current level. Detection circuitry is disposed between the USB port and the battery. The detection circuitry includes a current s... | 08/24/2010 |
| 7764050 | System and method of charging a battery and power delivery using an adapter and capacitor voltage divider A battery charging and power delivery system for a portable electronic device includes a first connection that connects the system to an AC/DC power adaptor. A second connection connects the system to the power bus of the portable electronic device. A third connecti... | 07/27/2010 |
| 7759907 | Battery charging and discharging by using a bi-directional transistor A battery charger for an electronic device receives current limited power from an external power source, such as a Universal Serial Bus power interface. The battery charger can linearly regulate a charging current to an internal battery and limit the charging curren... | 07/20/2010 |
| 7759906 | Linearly regulated battery charger A battery charger for an electronic device receives current limited power from an external power source, such as a Universal Serial Bus power interface. The battery charger can linearly regulate a charging current to an internal battery and limit the charging curren... | 07/20/2010 |
| 7755330 | Methods and systems for controlling an AC adapter and battery charger in a closed loop configuration Disclosed are methods, circuits, and systems for implementing an AC voltage adapter and battery charger system in a closed loop topology. Embodiments of the invention include methods for controlling an AC adapter charging a battery with steps for using a closed loop... | 07/13/2010 |
| 7755331 | Storage battery managing apparatus and vehicle controlling apparatus providing the same A storage battery managing apparatus which ensures charge-discharge control of a storage battery in consideration of state variation of each unit cell even if the battery pack includes a number of component unit cells, and a vehicle controlling apparatus providing t... | 07/13/2010 |
| 7710079 | Power manager and power managing method for battery-powered application A power manager is configured to manage power for a battery-powered application. A power source, a load and a battery are interconnected through a circuit path. Power from the power source is provided to the load and battery by a switching regulator. Various impleme... | 05/04/2010 |
| 7701178 | Charge control that keeps constant input voltage supplied to battery pack A circuit for controlling charging includes a transistor provided on a charging path between a position of a charging terminal and a position of a battery, an input voltage detecting circuit configured to detect a potential of a point on the charging path coupled to... | 04/20/2010 |
| 7683585 | Trailer battery charge systems and methods A trailer battery charge system for an electrical connection device between a vehicle and a trailer. The trailer battery charge system generally includes a first switching device that allows current to flow to an electrical terminal associated with a trailer battery... | 03/23/2010 |
| 7663346 | Battery charger for preventing both overshoot charging current and overcharged battery voltage during charging mode transition A battery charger for charging a battery through controlling a charging regulation circuit is provided. The battery charger includes a current sensing unit and an operational amplifier. The current sensing unit monitors a charging current applied to the battery when... | 02/16/2010 |
| 7656132 | Battery charger apparatus with a digital charge reduction loop A battery charger apparatus for charging a battery, comprises a charge-current control circuit for receiving a charge-current control signal to control an amount of charge current being drawn from an input source, e.g., a USB port or a line adapter; an analog contro... | 02/02/2010 |
| 7649343 | Charge control circuit, charging device, and connection checking method Electrical connection between a charging device and a secondary battery is checked during a wait time in which a charge mode of the charging device is selected. When the electrical connection is not successfully established, a charge current is not supplied from the... | 01/19/2010 |
| 7531990 | Voltage detector for an assembled battery An apparatus and method for detecting total voltage of an assembled battery including a number of serially-connected electric cells. Voltages of the respective cells are detected and added up, correlation between the resulting total voltage and a total voltage obtai... | 05/12/2009 |
| 7528582 | Battery charging and discharging by using a bi-directional transistor A battery charger for an electronic device receives current limited power from an external power source, such as a Universal Serial Bus power interface. The battery charger can linearly regulate a charging current to an internal battery and limit the charging curren... | 05/05/2009 |
| 7525291 | Linearly regulated battery charger A battery charger for an electronic device receives current limited power from an external power source, such as a Universal Serial Bus power interface. The battery charger can linearly regulate a charging current to an internal battery and limit the charging curren... | 04/28/2009 |
| 7479765 | Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery An integrated circuit for charging a secondary battery including a charge current detection circuit detecting a charge current output from a charging transistor, and generating a signal including the charge current information; a voltage comparison circuit comparing... | 01/20/2009 |
| 7459887 | Voltage detection circuit, overcurrent detection circuit, charging current control system, and voltage detection method A voltage detection circuit detects an input voltage in first and second periods to average by using a switch circuit and a sampling circuit. At this time, the input voltage of the second period is added to the input voltage of the first period so that a polarity of... | 12/02/2008 |
| 7363522 | Apparatus and methods for information handling system with power supply device with variable output power An information handling system includes a power source configured to provide a plurality of power levels to a load. At least one of the plurality of power levels corresponds to a level obtained by de-rating a capacity of the power source from a nominal design specif... | 04/22/2008 |
| 7348760 | Power management topologies A wake up circuit according to one embodiment includes a comparison circuit and an output decision circuit. The comparison circuit may be adapted to receive a first signal representative of a charging current level provided to a battery via a path and a second signa... | 03/25/2008 |
| 7342363 | Methods and apparatus for an improved amplifier for driving a dynamic load Methods and apparatus are provided for an amplifier for use with a nonlinear load. In one embodiment, a method is provided for driving a flash lamp. The method comprises providing an amplifier having a resonant reset topology, coupling an output of the amplifier to ... | 03/11/2008 |
| 7292014 | Controller and loading system thereof A loading system and a controller thereof are disclosed. The controller includes an adjustable triangle wave generator, an error signal generator, and a pulse signal generator. The triangle-wave generator is adapted to perform an amplitude and frequency operation ac... | 11/06/2007 |
| 7279873 | Current-limited protection circuit of switching power converter A switching power converter comprises a switch, a pulse width modulation (PWM) circuit, a rectifying filter circuit and a current limited protection circuit. The input terminal of the rectifying filter circuit is coupled to an input voltage via the switch. The curre... | 10/09/2007 |
| 7268520 | Sense amplifier for use with wake-up charging current A sense amplifier adapted to amplify a voltage signal representative of a charging current provided to a rechargeable battery. The sense amplifier may include a p-type input sense amplifier and an n-type input sense amplifier, The p-type input sense amplifier may be... | 09/11/2007 |
| 7227652 | Switching power supply, method of operation and device-and-power-supply assembly A switching power supply, with or without a secondary side controller, is connectable to a power-supply-using device (such as a printer without a power supply) receiving a voltage from the power-supply's secondary side. The device has a device controller (such as a ... | 06/05/2007 |
| 7221124 | Battery charger with protection circuitry The charger includes a controller, a battery power source having at least two power settings connected to the controller, a power supply connectable to an outside power source, the power supply receiving a current and voltage from the outside power source for provid... | 05/22/2007 |
| 7218076 | Battery charging system A battery charging system comprising: a current source; a battery; and a voltage and current regulator, which regulates voltage applied to the battery and current supplied to the battery. The battery charging system shapes the current supplied to the battery, and ma... | 05/15/2007 |
| 7102415 | Trip-point detection circuit A current is provided from a power source to a load through a pass circuit that is series coupled to a sense resistor. A current trip-point detection circuit is arranged to detect a change in the current that is provided to a load. The current trip-point detection c... | 09/05/2006 |
| 7095217 | Method circuitry and electronic device for controlling a variable output dc power source Power control circuitry and method for controlling a variable output DC power source. The power control circuitry may comprise a first comparator to compare a signal representative of an output current level of the variable output DC power source with a threshold le... | 08/22/2006 |
| 7088076 | Power management for battery powered appliances A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, ... | 08/08/2006 |
| 7071655 | AC adapter having a function for lowering and heightening an adapter voltage Disposed in a secondary side circuit of an AC adapter (10A), a−ΔI detection circuit (45) detects that a charging current (Ic) lowers less than a set current value to produce a detected signal. A voltage control circuit (42A) operates so as to... | 07/04/2006 |
| 7064521 | Charging circuit for parallel charging in multiple battery systems A charging circuit for controlling a system charging parameter provided to a host of rechargeable batteries, wherein the host of batteries includes at least a first battery and second battery that may be coupled in parallel. The charging circuit provides for fast ch... | 06/20/2006 |
| 7014375 | Thermal printer and method determining battery condition based on temperature A tape print apparatus is capable of setting a weak voltage value, serving as a criterion on indicating a power weakness condition on a display, to an appropriate voltage value based on various kinds of usage conditions by considering that the degree of consumption ... | 03/21/2006 |
| 6995963 | Methods and apparatus for charging a battery in a peripheral device A power manager for managing power delivered to a battery operated peripheral device is disclosed. The power manager includes an input current limiter arranged to suppress a power surge associated with an insertion event by a power cable arranged to provide an exter... | 02/07/2006 |
