A charge sharing circuit includes a charge source having an accumulated first charge and a charge load having an accumulated second charge, where during a charge sharing interval the second charge is less than the first charge. A charge sharing regulator selectively couples between the charge source and the charge load along a charge sharing path. The charge sharing regulator regulates transfer of a shared amount of charge from the charge source to the charge load during the charge sharing interval.

Systems and methods for power distribution are disclosed. A system includes a first power domain that supplies current to an integrated circuit at a first voltage level, a second power domain that supplies current to the integrated circuit at a second voltage level, and a current distribution component that is connected to the first power domain and connectable to the second power domain and senses a metric comprising a first current level or a first voltage level drawn from the first power domain, determines whether the metric exceeds a first threshold, and in response to determining that the metric exceeds the first threshold, electrically connects the second power domain to the integrated circuit to supply additional current such that an aggregate current level received by the integrated circuit comprises current from the first power domain and the additional current from the second power domain.

A power supply unit, preferably for a power analyzer, a power analyzer comprising a power supply unit and a method for operating a power supply unit, wherein the power supply unit comprises a feedback control unit arranged for selectively controlling the output level of the voltage or the output level of the current to output terminals of the power supply unit on a preset value, and means for sensing the actual output level of the voltage and current, respectively, and sending a signal representing the sensed output level to said feedback control unit, wherein the feedback control unit is arranged to autonomously prioritize or activate at least a first control loop for the controlling of the output level of the current or a second control loop for the controlling of the output level of the voltage, based on data generated within the power supply unit and/or externally generated data supplied to the power supply unit.

The present invention discloses a bias current generation circuit. An operation amplifier compares an input voltage having a zero-temperature coefficient and a feedback voltage to generate a driving voltage. An output transistor generates a bias current according to the driving voltage. A variable resistive circuit is electrically coupled to the output transistor through a feedback node to generate the feedback voltage according to the bias current and includes series-coupled resistors and switch transistors. Each of the resistors has a resistance having a positive temperature coefficient and includes a current input terminal and a current output terminal. Each of the switch transistors is electrically coupled between the current output terminal of one of the resistors and a ground terminal. One of the switch transistors turns on according to a control voltage variable according to the temperature variation to enable resistors to generate the resistance having a negative temperature coefficient.

A charge sharing circuit includes a charge source having an accumulated first charge and a charge load having an accumulated second charge, where during a charge sharing interval the second charge is less than the first charge. A charge sharing regulator selectively couples between the charge source and the charge load along a charge sharing path. The charge sharing regulator regulates transfer of a shared amount of charge from the charge source to the charge load during the charge sharing interval.

Distributions of on-chip inductors for monolithic voltage regulation are described. On-chip voltage regulation may be provided by integrated voltage regulators (IVRs), such as a buck converter with integrated inductors. On-chip inductors may be placed to ensure optimal voltage regulation for high power density applications. With this technology, integrated circuits may have many independent voltage domains for fine-grained dynamic voltage and frequency scaling that allows for higher overall power efficiency for the system.

Vehicles and vehicle power circuits are disclosed for providing multiple different voltages from the same power source. An example vehicle includes a power source, a plurality of electrical loads, and a power circuit. The power circuit is electrically connected to the power source and the plurality of electrical loads. The power circuit includes a plurality of power segments connected in parallel to the power source, each power segment comprising a DC to DC converter and an ultra capacitor in series with the DC to DC converter, wherein the ultra capacitors of the plurality of power segments are connected in series.

A switching regulator may be used to generate an output voltage from an input voltage. The switching regulator includes; an inductor including a first terminal and a second terminal that passes an inductor current from the first terminal to the second terminal, a first switch that applies the input voltage to the first terminal when turned ON, a second switch that applies a ground potential to the first terminal when turned ON, a feedback circuit configured to estimate a load receiving the output voltage, detect when the inductor current reaches an upper bound or a lower bound, and adjust the lower bound based on the estimated load, and a switch driver configured to control the first switch and the second switch, such that the inductor current is between the upper bound and the lower bound in response to at least one feedback signal provided by the feedback circuit.

Aspects of the invention include a circuit having a two-stage amplifier coupled to a transistor array and to a comparator, the transistor array being configured to provide an output to a load, the transistor array including transistors. The circuit includes a controller coupled to the comparator and to the transistor array, the two-stage amplifier being configured to modulate a current density in the transistor array via gate terminals of the transistors, wherein, by using the comparator and the controller, the two-stage amplifier is configured to modulate a number of the transistors that are to couple to the load.

A system comprising: a LDO regulator configured to receive a supply voltage and provide an output voltage based on a function of the supply voltage, the LDO regulator switchable between at least a first and second mode, wherein the first and second modes each define the output voltage provided to the output terminal based on different functions of the supply voltage; and a digital logic controller configured to select the mode of the LDO regulator by control signalling to the LDO regulator, the digital logic controller configured to receive power for the provision of the control signalling from the LDO regulator; wherein the LDO regulator comprises LDO start-up circuitry configured to cause the LDO regulator, during start-up, to default to a predetermined one of the first and second mode and the LDO start-up circuitry further configured to prevent the digital logic controller from controlling the mode of the LDO regulator.