Abstract: The invention provides advances in the arts with useful and novel driver methods. The invention provides circuit driver and control methods for relatively high-current drivers, usable with relatively low-voltage battery power sources. Preferred embodiments include one or more high series resistance capacitors electrically connected with a power source. A low resistance driver circuit regulates power supplied from the capacitors to the load.

Abstract: A system for power transfer is provided. In one exemplary embodiment, the system includes an inductive power device, such as a device that transmits or receives power over an inductive coupling. For example, an adjustable impedance is coupled to the inductive power device, where the adjustable impedance is used for dynamically controlling the power gain in the inductive power device, such as by damping power generated by circuit impedances, such as inductances, capacitances or resistances, and combinations thereof.

Abstract: The invention provides advances in the arts with useful and novel driver methods. The invention provides circuit driver and control methods for relatively high-current drivers, usable with relatively low-voltage battery power sources. Preferred embodiments include one or more high series resistance capacitors electrically connected with a power source. A low resistance driver circuit regulates power supplied from the capacitors to the load.

Abstract: The invention provides advances in the arts with useful and novel driver methods. The invention provides circuit driver and control methods for relatively high-current drivers, usable with relatively low-voltage battery power sources. Preferred embodiments include one or more high series resistance capacitors electrically connected with a power source. A low resistance driver circuit regulates power supplied from the capacitors to the load.

Abstract: The invention provides advances in the arts with useful and novel driver methods. The invention provides circuit driver and control methods for relatively high-current drivers, usable with relatively low-voltage battery power sources. Preferred embodiments include one or more high series resistance capacitors electrically connected with a power source. A low resistance driver circuit regulates power supplied from the capacitors to the load.

Abstract: A system for power transfer is provided. In one exemplary embodiment, the system includes an inductive power device, such as a device that transmits or receives power over an inductive coupling. For example, an adjustable impedance is coupled to the inductive power device, where the adjustable impedance is used for dynamically controlling the power gain in the inductive power device, such as by damping power generated by circuit impedances, such as inductances, capacitances or resistances, and combinations thereof.

Abstract: A voltage regulation and battery charging system is provided. The system may include a switching regulator selection control circuit, two switching regulator controller circuits, two power transistors, a common synchronous transistor, and a common LC circuit. The two switching regulator controller circuits may synchronously switch the two power transistors and the one common synchronous transistor. One of the switching regulator controller circuits may receive a voltage from an AC adapter and the other may receive a voltage from a USB port. Further, the switching regulation selection control circuit selects which of the two switching regulator controller circuits controls the regulation of the system output voltage employing the common LC filter.

Abstract: Methods and systems for driving a motor are disclosed. A center tap voltage and a desired center tap voltage are used to generate a voltage feedback. A power amplifier receives a reference current and the voltage feedback. The power amplifier provides a phase current to a phase of a motor. The phase current is substantially centered about the desired center tap voltage as a consequence of the voltage feedback. Thus, high-side to low-side or state to state current variations are reduced thereby reducing the occurrence of problems such as torque ripple and back EMF.

Abstract: The present invention provides an apparatus and system (300) supplying a regulated voltage of sufficient magnitude to enable de-latching of a head carriage from a latching device. In at least one embodiment, providing a voltage source for the voice coil motor (14) includes a regulator (310) having an input for receiving a first voltage potential and operably configured to provide a second voltage potential to an output selectively coupled to the voice coil motor (14) by a switch (345). A current source (315) is operably configured to provide a predetermined limited current via a pass transistor (325) associated with the regulator is also included. Further included is a capacitor (335) coupled to the regulator output and operably configured for charging by the current source via the current limited pass transistor.

Abstract: The present invention provides an apparatus and system (300) supplying a regulated voltage of sufficient magnitude to enable de-latching of a head carriage from a latching device. In at least one embodiment, providing a voltage source for the voice coil motor (14) includes a regulator (310) having an input for receiving a first voltage potential and operably configured to provide a second voltage potential to an output selectively coupled to the voice coil motor (14) by a switch (345). A current source (315) is operably configured to provide a predetermined limited current via a pass transistor (325) associated with the regulator is also included. Further included is a capacitor (335) coupled to the regulator output and operably configured for charging by the current source via the current limited pass transistor.

Abstract: A circuit and method for providing a low drop out voltage regulator. A source follower circuit is provided having a transistor (MD1) with an output terminal for driving a load at its source terminal and a voltage supply coupled to the drain terminal. At least one diode (D1) is coupled between the gate terminal and a ground reference to provide a predetermined voltage at the gate of the transistor (MD1). A voltage multiplier circuit is provided having an input (IN) for receiving an oscillating input voltage and a charge storage device (39) coupled between the oscillating input and a voltage reference (Vref), and being further coupled in series with the voltage reference and then to the gate terminal of the transistor (MD1). The oscillating input voltage is used to charge the charge storage device (39) to a voltage approximately equal to the voltage reference.