Abstract: A display device includes a display panel displaying an image. A light source unit provides light to the display panel. A cover member covers a portion of an upper surface of the display panel and a side surface of the display panel. The cover member exposes a display area of the display panel. A thermoelectric device is disposed between the cover member and the light source unit. The thermoelectric device contacts the cover member, and the thermoelectric device generates an electromotive force due to a difference in temperature between the light source unit and the cover member.

Abstract: A DC-DC converter comprises an oscillator and a charge pump, to ensure operation at low voltage. The oscillator comprises one or more source degenerated transistors comprising a degeneration impedance located between a source of the transistor and a ground connection. The degeneration impedance comprises an inductor and a capacitor. Also provided is an energy harvesting device comprising such a DC-DC converter.

Abstract: A buck-boost converter automatically chooses work mode between buck mode, boost mode and buck-boost mode, in response to an input voltage and an output voltage. The buck-boost converter is with simple structure, convenient mode transition and lower output voltage ripple.

Abstract: These various embodiments serve to facilitate interlaced amplitude pulsing using a hard-tube type pulse generator having at least one energy-storage unit each comprising at least one energy-storing capacitor. Generally speaking, this comprises controlling an amount of energy withdrawn from the energy-storage unit and provided to an output load to form productive electric pulses by controlling at least one of: (1) energy replenishment; and (2) non-productive energy withdrawal of the energy-storage unit, to thereby achieve a series of productive interlaced amplitude electric pulses.

Abstract: A system for supplying a load comprising: an input inductor configured to receive an input voltage, a selection module connected to the inductor via a switching node, and a multi-level half-bridge stage comprising a plurality of half-bridge stages, each half-bridge stage comprising a pair of switches connected between a switching node; a power combining stage coupled to each half-bridge stage using parallel bus voltage lines output from the multi-level half-bridge stage, the power combining stage configured to output a voltage to the load; and a controller configured, based on the input voltage, to selectively control a half-bridge stage to operate in a half-bridge mode to provide a stepped-up voltage on a bus voltage line, wherein the controller is further configured to control the power combining stage to provide a voltage between the bus voltage lines and the sum of these voltages is higher than a peak of the input voltage.

Abstract: An intellectual property (IP) block portion in an integrated circuit includes a first regulator, a first circuit, a power converter, and a second circuit. The first regulator is configured to receive a supply voltage and to generate a first output voltage. The first circuit is coupled with the first regulator and configured to receive the first output voltage. The power converter includes a charge pump configured to receive the supply voltage and to generate a pumped voltage; and a second regulator configured to receive the supply voltage or the pumped voltage and to generate a second output voltage. The second output voltage has a voltage level greater than a voltage level of the first output voltage. The second circuit is coupled with the power converter and configured to receive the second output voltage.

Abstract: A capacitive voltage converter providing multiple gain modes comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switch resistance value of the switched capacitor array, and to control a switching sequence of the switched capacitor array. An override control coupled to the skip gating control and the switched capacitor array, the override control configured to detect transitions in a gain mode and to modify the switch resistance value of the switched capacitor array and the switching sequence of the switched capacitor array for a finite amount of time following the gain mode transition.

Abstract: Various circuits, apparatuses and methods are disclosed for generating a DC voltage conversion. In an example embodiment, an apparatus includes a DC voltage multiplier having a first capacitor. In a first mode, the first capacitor is charged to store a first voltage between first and second terminals of the capacitor. In a second mode, the DC voltage multiplier shifts a voltage of the second terminal up to a second voltage, thereby shifting the first terminal to a third voltage. The apparatus also includes a fractional output control circuit that when enabled, connects a second capacitor between the first terminal of the first capacitor and the ground reference voltage. The connecting of the second capacitor causes the first terminal of the first capacitor to be pulled down to a voltage between the first and third voltages when the second terminal is shifted up to the second voltage.

Abstract: The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.

Abstract: A power circuit includes a first charge pump for converting a supply voltage into a first high voltage and a first low voltage, at least one second charge pump, each for increasing the first high voltage by a first variance value to a second high voltage, and at least one third charge pump, each for decreasing the first low voltage by a second variance value to a second low voltage. A difference between the first high and low voltages is less than a breakdown threshold. The second and third variance margins are less than the breakdown threshold.

Abstract: Aspects of this disclosure relate to voltage generators, such as negative voltage generators. In certain configurations, a negative voltage generator includes a charge pump controllable by a clock signal and configured to provide a negative voltage at an output node, an oscillator configured to activate based on an enable signal and to provide the clock signal to the charge pump, a comparator configured to generate the enable signal based on comparing a feedback voltage with a reference value, a voltage divider electrically connected between a positive voltage node and the output node and configured to generate the feedback voltage at a feedback node, and a start-up capacitor electrically connected between the positive voltage node and the feedback node and configured to control a settling time of the feedback voltage.

Abstract: This disclosure describes techniques for controlling a power supply voltage for a high-side gate driver that is used in a power converter. In some examples, in response to an overvoltage condition that occurs on an input voltage lead of a power converter, a power converter may decouple a terminal of a charge pump capacitor from the input voltage lead, and couple the terminal of the capacitor to a reference voltage lead. In further examples, in response to an overvoltage condition that occurs on an input voltage lead of a power converter, a power converter may turn off both switching transistors.

Abstract: The current invention relates to a power conversion device (10), for supplying a load (11) with a PWM signal through an inductive output filter (105). The power conversion device (10) comprises a power conversion module (101) supplied by a DC input voltage (Vin) and is configured for providing a plurality of output signals (PWM1, . . . , PWMn) having a level amplitude that is a fraction of the input voltage (Vin) level. Each output signal is floating with a bias component equally split in a plurality of steps ranging from a determined lowest fraction level amplitude to a determined highest fraction level amplitude. The power conversion device (10) further comprises a multiplexer (103) receiving as a plurality of inputs the plurality of output signals (PWM1, . . . , PWMn). The multiplexer is configured for outputting one output signal (PWMx) selected from the plurality of inputs, whereby the output signal (PWMx) of the multiplexer (103) is connected to the output filter (105).

Abstract: A power factor correction circuit includes: a coil and MOSFETs that boost an input voltage to generate a boosted voltage; a first capacitor having one end connected to a first output terminal, and the other end connected to an intermediate node; and a second capacitor having one end connected to the intermediate node, and the other end connected to a second output terminal. In a first operation mode, the boosted vol tage is applied to the two ends of the first capacitor when a positive voltage is input, and applied to the two ends of the second capacitor when a negative voltage is input. In a second operation mode, the boosted voltage is applied to two ends of the first and second capacitors connected in series. Thus, there is provided a power factor correction circuit which has a high efficiency and is compatible with an input voltage in a broad range.

Abstract: A boost converter receives an input voltage and provides an output voltage and includes a power switch and a voltage control circuit configured to drive the power switch as a function of the output voltage. A voltage sensing circuit in the form of a voltage divider is coupled to sense the output voltage and provide a feedback voltage. The voltage control circuit drives the power switch. An electronic control switch is configured to selectively connect the voltage divider to sense the output voltage as a function of an enable signal generated by a timer circuit. The enable signal is pulsed such that the voltage divider is periodically connected to sense the output voltage during a first time and is disconnected from sensing during a second time.

Abstract: A system, in certain embodiments, includes a power supply. The power supply includes an ultracapacitor configured to be charged by a DC source. The power supply also includes a first switch that enables charging of the ultracapacitor by the DC source when in a closed position and disables charging of the ultracapacitor when in an open position. The power supply further includes a second switch configured to enable discharging of the ultracapacitor when in a closed position and to disable discharging of the ultracapacitor when in an open position. As the ultracapacitor is discharged, a current is supplied to actuate a shape memory alloy element.

Abstract: A DC/DC converter comprising a first charge pump circuit including first MOS transistors including first depletion MOS transistors, an oscillating circuit connected to the charge pump circuit only at the gates of some at least of the first MOS transistors, including the first depletion MOS transistors.

Abstract: A voltage multiplier includes a supply voltage, at least two multiplier stages electrically connected together, each stage having a trigger voltage terminal, an input terminal, an output terminal, and a capacitor, and each stage connected to the supply voltage, an input stage electrically connected to a first of the at least two multiplier stages, and an output stage electrically connected to a final of the at least two multiplier stages.

Abstract: Apparatus for communication includes a single one-way link, which is physically capable of carrying the communication signals in one direction and incapable of carrying the communication signals in the opposite direction. Ancillary circuitry is coupled so as to cause the single one-way link to convey both first communication signals from a first station to a second station and second communication signals from the second station to the first station.

Abstract: The current invention relates to a driver (10,20) for driving at least one main load and one auxiliary load comprising: a power converter (101) adapted to convert an input voltage (Vin) into at least one main output voltage provided through a main output (1011) for driving said main load, and at least one auxiliary output DC voltage through an auxiliary output (1013) for supplying said auxiliary load, a controller (103) adapted to control the main output based on at least one input set point, wherein the power converter (101) comprises a switched capacitor converter comprising a plurality of switches and a plurality of capacitors, the main output (1011) being connected to at least one internal node of the power converter (101), the auxiliary output (1013) being connected to a DC node of the power converter (101).

Abstract: A regulator includes a capacitor connected between a ground terminal and an output terminal at which a first voltage is supplied. The first voltage is higher than a power source voltage supplied to the regulator. A feedback circuit in the regulator is configured to output a boost signal corresponding to a comparison between the first voltage and a threshold voltage value. A clock generating circuit includes an oscillator circuit that outputs an oscillation signal and a buffer circuit that outputs a clock signal according to the oscillation signal. The clock signal has an electric current level that is controlled in accordance with the boost signal. A charge pump outputs the first voltage in accordance with the clock signal.

Abstract: A negative bias circuit outputs a DC voltage of a negative polarity. A positive bias circuit outputs a DC voltage of a positive polarity. The DC voltage of the positive polarity is used, for example, as a transfer voltage, and the DC voltage of the negative polarity is used as a cleaning voltage for cleaning toner. A cycle of the clock signal in a period during which the DC voltage of the first polarity is output is longer than a cycle of the clock signal in the period during which the voltage supplied to the load transits from the DC voltage of the first polarity to the DC voltage of the first polarity.

Abstract: Apparatus for communication includes a single one-way link, which is physically capable of carrying the communication signals in one direction and incapable of carrying the communication signals in the opposite direction. Ancillary circuitry is coupled so as to cause the single one-way link to convey both first communication signals from a first station to a second station and second communication signals from the second station to the first station.

Abstract: An integrated circuit in which a voltage divider circuit is integrated comprises a first resistor, second resistor, control portion, switch, and switching portion. The first resistor and second resistor form a resistive voltage divider element for dividing a voltage obtained by rectifying an alternating-current voltage, or a direct-current voltage, supplied to a control portion. The switch is provided in series with the resistive voltage divider element, and passes or cuts off current passing through the resistive voltage divider element. The switching portion switches the switch so as to pass current during driving of the control portion, and cut off current during standby of the control portion.

Abstract: One or more circuits are provided wherein leakage current is mitigated. A circuit comprises a pad, a first transistor, a second transistor, a power leakage component and a data leakage component. The first transistor and the second transistor are respectively configured to control a voltage level at the pad. The first transistor is connected to the pad and to a first voltage source. The second transistor is connected to the pad and to a third voltage source. The power leakage component is connected between the first transistor and the pad. The data leakage component is connected between the second transistor and the pad. The power leakage component is configured to mitigate leakage current from the first transistor to the pad. The data leakage component is configured to mitigate leakage current from the pad to the second transistor.

Abstract: An apparatus comprises an integrated circuit (IC) comprising an external IC connection, an IC substrate connection, a voltage clamp circuit and an under voltage circuit. The voltage of the IC substrate connection is set to a first voltage when a voltage of the external connection of the IC is within a normal operating voltage range. The voltage clamp circuit is configured to clamp the voltage supply of one or more circuits internal to the IC to within a normal operating voltage range when the voltage of the external IC connection exceeds the normal operating voltage range. The under voltage circuit is communicatively coupled to the clamp circuit and configured to set the voltage of the substrate to a second voltage when the voltage at the external IC connection of the IC is less than zero volts.

Abstract: Provided is a wireless power data transmission system that may transmit wireless power and may transmit data using wireless power. A wireless power transmitter may include capacitors, and may convert an electrical connection of the capacitors to a parallel connection for charging. The wireless power transmitter may also convert the electrical connection of at least two of the capacitors to a series connection for discharging.

Abstract: The present invention relates to a driver device (40; 60) for driving a capacitive load (12), in particular an ultrasound transducer (12) having one or more transducer elements, comprising an output terminal (42; 68) for providing an alternating drive voltage (V14; V22) to the load (12), a plurality of voltage supply elements (46, 48, 50, 52; 72, 74) for providing intermediate voltage levels (V16), a plurality of controllable connecting means (S0-S7) each associated to one of the voltage supply elements (46, 48, 50, 52; 72, 74) for connecting the voltage supply elements (46, 48, 50, 52; 72, 74) to the output terminal (42; 68) and for supplying one of the intermediate voltage levels (V16) or a sum of a plurality of the intermediate voltage levels (V16) as the alternating drive voltage (V14; V22) to the output terminal.

Abstract: Series switches for power delivery. A regulator operated as a current source is arranged in parallel with a switched capacitor divider. A switched capacitor divider is configured in series with a plurality of linear regulators with each regulating one of a plurality of voltage outputs from the switched capacitor divider. In another embodiment, a series switch bridge has a first pair of switches connected in series with a second pair of switches across a voltage input, each switch within a pair of switches is switched in-phase with the other while the first pair of switches is switched out of phase with the second pair of switches. A balancing capacitor is coupled across one switch in both the first and second pair to be in parallel when either of the pair of switches is closed to reduce a charge imbalance between the switches.

Abstract: A charge pump system may include a charge pump including a plurality of boosting units boosting an input voltage input to an input terminal multiple times depending on clock signals and outputting the boosted voltage to an output terminal; and a charge pump protection circuit including a series resistor unit disposed between the output terminal and a ground and including a plurality of resistors connected to each other in series. A portion of the plurality of resistors are disposed in parallel to a portion of the plurality of boosting units.

Abstract: Various embodiments provide a chip. The chip has a carrier, an integrated circuit formed above the carrier, and an energy storage element. The energy storage element has a first electrode and a second electrode and is used to supply the integrated circuit with electrical energy. The carrier, the integrated circuit and the energy storage element are monolithically formed, the first electrode being formed from the carrier.

Abstract: Techniques are described to harvest power from a single current carrying conductor to furnish power to a powered device. The techniques employ a power harvesting device that is coupled to the conductor. In implementations, the conductor has a first path and a second path. The power harvesting device includes a first switch coupled to the second path. An energy storing element is coupled to the first path and configured to store energy based upon the direct current flowing through the first path. The power harvesting device also includes a power condition and management device coupled to the energy storing element configured to switch the first switch to a closed configuration when the energy storing element is measured to have a predefined high voltage threshold, and to switch the first switch to an open configuration when the energy storing element is measured to have a predefined low voltage threshold.

Abstract: Some embodiments include apparatuses and methods having an input node to receive a first voltage, an output node to provide an output voltage, and a charge pump to generate the output voltage based on the first voltage. The charge pump can include a control node to receive a control signal for controlling at least one switch of the charge pump, such that the output voltage includes a value greater than a value of the first voltage. The control signal can include a level corresponding to a second voltage having a value greater than the value of the output voltage. Additional apparatus and methods are described.

Abstract: A power conversion system includes a power converter that converts an input voltage into a DC output voltage. Additionally, the power conversion system also includes a controller that provides a self-adjusting set-point control scheme for the power converter. A method of power conversion system operation is also provided.

Abstract: An integrated circuit in which a voltage divider circuit is integrated comprises a first resistor, second resistor, control portion, switch, and switching portion. The first resistor and second resistor form a resistive voltage divider element for dividing a voltage obtained by rectifying an alternating-current voltage, or a direct-current voltage, supplied to a control portion. The switch is provided in series with the resistive voltage divider element, and passes or cuts off current passing through the resistive voltage divider element. The switching portion switches the switch so as to pass current during driving of the control portion, and cut off current during standby of the control portion.

Abstract: In an initialization phase of a charge pump, an input signal is supplied to an input electrode of a capacitor of the charge pump and to an initialization device of the charge pump. An initialization signal is supplied to the initialization device of the charge pump. The initialization device supplies an output signal to an output electrode of the capacitor. The output signal has a high level and a low level corresponding to a high level and a low level of the input signal, the input signal and the output signal causing a charge to be accumulated in the capacitor. In a pumping operation phase following the initialization phase, the initialization signal is removed from the initialization device to place the output electrode of the capacitor in a floating state, and a pumping action is performed with the charge accumulated in the capacitor.

Abstract: We describe a modular adjustable power factor renewable energy inverter system. The system comprises a plurality of inverter modules having a switched capacitor across its ac power output, a power measurement system coupled to a communication interface, and a power factor controller to control switching of the capacitor. A system controller receives power data from each inverter module, sums the net level of ac power from each inverter, determines a number of said capacitors to switch based on the sum, and sends control data to an appropriate number of the inverter modules to switch the determined number of capacitors into/out of said parallel connection across their respective ac power outputs.

Abstract: An apparatus for converting a first voltage into a second voltage includes a reconfigurable switched capacitor power converter having a selectable conversion gain. converter includes a cascade multiplier switched capacitor network having capacitors, each of which electrically connects to a stack node and to a phase node. A controller causes the network to transition between first and second operation modes. In the first mode, at least one capacitor is isolated from a charge transfer path of the reconfigurable switched capacitor power converter. Consequently, in the first mode of operation, the power converter operates with a first gain. In the second mode, the power converter operates with a second conversion gain. Meanwhile, a third voltage across the at least one capacitor is free to assume any value.

Abstract: A driver circuitry includes a capacitor, a first switch, and a second switch. The capacitor includes a first node and a second node. The first switch is electrically coupled to the first node of the capacitor. The second switch is electrically coupled to the second node of the capacitor. Additionally, the second node of the capacitor and the second switch are electrically coupled to an output pin of the driver circuitry operable to drive an external switch. As discussed herein, settings of the first switch and the second switch control a voltage outputted from the output pin and charging of the capacitor.

Abstract: Cases for tablet computers and methods are disclosed. An embodiment of one such case has an interface configured to allow the tablet computer to communicate with a removable storage device using a communication protocol not supported by the tablet computer, where the case is configured to contain at least a portion of the tablet computer therein.

Abstract: A power supply voltage regulating apparatus includes: a reference voltage generating circuit that generates a reference voltage; an operational amplifier that amplifies the reference voltage and outputs the amplified reference voltage as a power supply voltage; a switching circuit that is connected between an output terminal of the operational amplifier and ground, and that performs a switching operation; a ring oscillator that is connected in parallel with the switching circuit between the output terminal of the operational amplifier and ground, and that generates an oscillation signal; and a controller that is connected with an input terminal of the reference voltage generating circuit, and that controls the reference voltage in accordance with an oscillating frequency of the oscillation signal, a temperature of the switching circuit, and an operating frequency of the switching circuit, to regulate the power supply voltage that is output from the operational amplifier.

Abstract: One example refers to a circuitry comprising a first charge pump stage controlled by a first control signal, a second charge pump stage controlled by a second control signal, wherein the first charge pump stage and the second charge pump stage are arranged subsequently to each other and comprising a control unit for providing the first control signal and the second control signal, wherein the control unit is arranged to set the second control signal to high when the first control signal is high. Also, a multi-branch charge pump, a method for controlling various charge pumps and a system for controlling various charge pumps are suggested.

Abstract: Techniques are presented for improving the efficiency of charge pumps. A charge pump, or a stage of a charge pump, provides its output through a pass gate. For example, this could be a charge pump of a voltage doubler type, where the output is supplied through pass gate transistors whose gates are connected to receive the output of an auxiliary section, also of a voltage doubler type of design. The waveforms provided to the gates of the pass gate transistors are modified so that their low values are offset to a higher value to take into account the threshold voltage of the pass gate transistors. In a voltage doubler based example, this can be implemented by way of introducing diodes into each leg of the auxiliary section.

Abstract: A semiconductor device comprises a stacked layer memory block and associated peripheral circuits, such as a booster circuit, in stacked layer arrangements. The booster circuit includes plural rectifier cells that are series-connected and plural first capacitors. The plural first capacitors receive a first clock signal on one end, and the other ends thereof are each connected to one end of a different rectifier cell. Each first capacitor is composed of plural first conductive layers that are arrayed with a set pitch perpendicular to the substrate. Either the even numbered or the odd numbered first conductive layers are supplied with the first clock signal. The other of the even numbered or odd numbered first conductive layers are each individually connected to one end of a different rectifier cell.

Abstract: One embodiment of the present invention sets forth a mechanism for transmitting and receiving ground-referenced single-ended signals. A transmitter combines a direct current (DC) to DC converter including a flying capacitor with a 2:1 clocked multiplexer to drive a single-ended signaling line. The transmitter drives a pair of voltages that are symmetric about the ground power supply level. Signaling currents are returned to the ground plane to minimize the generation of noise that is a source of crosstalk between different signaling lines. Noise introduced through the power supply is correlated with the switching rate of the data and may be reduced using an equalizer circuit.

Abstract: The present disclosure relates to methods and circuits to achieve ground centered charge-pumps generating output voltages of +/?VDD/2 or +/?VDD/3 while achieving high efficiency of power conversion and minimized output impedances. Key points of the disclosure are minimizing number of switching states, reducing the time required for transition through all switching states, maintain constant flying capacitor voltages in all switching states, and, ideally, configuring the size of the flying capacitors large enough to provide the required load charge of each switching state without voltage change of the flying capacitors.

Abstract: Provided are a vehicle ultrasonic parking assistance apparatus including a charge pumping circuit and a method of operating the same. The vehicle ultrasonic parking assistance apparatus changes a transmission output voltage in a voltage driving scheme without using a transformer. By using the charge pumping circuit instead of the transformer so as to boost a voltage, the manufacturing cost is reduced, and a signal is input to the ultrasonic converter at the same voltage as a voltage of when the transformer is used. Also, the charge pumping circuit is provided at a region in which the variable current source was provided, and thus, the manufacturing cost is not additionally expended. Furthermore, since only a conversion of energy by the ultrasonic converter is considered, designing is simplified.

Abstract: A power management device of a touchable control system includes a boost circuit, a storage circuit, a detection circuit and a loading circuit. The boost circuit has an output terminal and generates an output voltage. The storage circuit electrically connects to the output terminal of the boost circuit and stores the output voltage. The detection circuit electrically connects to the storage circuit so as to detect the output voltage. The loading circuit electrically connects or disconnects to the output terminal of the boost circuit according to a predetermined value of the output voltage.

Abstract: A boost circuit includes a power rail to provide a supply voltage, a switch transistor controlling output of a boosted signal from a source of the switch transistor, and a timing and voltage control circuit configured to generate an equalization (EQ) signal to be applied to a gate of the switch transistor. The EQ waveform has a level being an EQ high level, an EQ low level lower than the EQ high level, or an EQ clamped level between the EQ low level and the EQ high level.

Abstract: A method of detecting a wire break in a high voltage generating device that is configured to detect a wire breakage in a low-voltage cable is disclosed. The method of a wire break includes: detecting whether a wire break has occurred in each of the lines in accordance with a combination pattern of whether the time differential value of an IM signal value of a CW circuit obtained when an operating voltage is boosted is positive, negative, or 0, and whether the time differential value of a VM signal value obtained after the operating voltage is boosted by the CW circuit is positive, negative, or 0; and identifying which of the lines is broken.