Abstract: A switching control circuit configured to control a switching device. The switching control circuit includes a detection circuit configured to detect whether a current flowing through the switching device is in an overcurrent state, a first signal output circuit configured to output a first signal indicating whether a time period of the overcurrent state is longer than a first time period, and a driving circuit. The driving circuit turns on the switching device based on a first input signal. The driving circuit turns off the switching device through a first switch based on a second input signal when the time period of the overcurrent state is shorter than the first time period, and through a second switch, having a greater on-resistance than the first switch, based on the second input signal and the first signal when the time period of the overcurrent state is longer than the first time period.

Abstract: A package that includes a substrate and integrated device coupled to the substrate. The integrated device includes a first core and a second core. The substrate includes a first power interconnect configured to provide a first electrical path for a first power resource to the first core of the integrated device. The first power interconnect includes a first power plane. The substrate includes a second power interconnect configured to provide a second electrical path for a second power resource to the second core of the integrated device. The second power interconnect includes a second power plane. The substrate includes a switch coupled to the first power interconnect and the second power interconnect, where if the switch is turned on, the switch is configured to enable at least some of the power resource from the second power resource to contribute to the first core of the integrated device.

Abstract: A power stage includes a power transistor and a driver, the power transistor comprising a collector, a gate and an emitter and being configured to change over from a saturated state to an off state and vice versa in accordance with a control from the driver, the power stage comprising a resistor Rg positioned between the driver and the gate, the power stage comprising a circuit for compensating for delays that is positioned in parallel with the resistor Rg, comprising: a circuit for compensating for turn-on initialization delays, which is configured to divert the current from the resistor Rg when a saturation of the power transistor is initialized, a circuit for compensating for turn-off initialization delays, which is configured to divert the current from the resistor Rg when a switching-off of the power transistor is initialized, a circuit for compensating for delays that is configured to divert the current from the resistor Rg when the power transistor is close to the saturated state.

Abstract: A shift register includes: an input circuit electrically connected to a first clock signal terminal, a first voltage signal terminal and a first node; a first output circuit electrically connected to the first node, a second clock signal terminal and a scanning signal terminal; a first control circuit electrically connected to a third clock signal terminal, a fourth clock signal terminal, a fifth clock signal terminal and the first node; a second control circuit electrically connected to a sixth clock signal terminal, a second voltage signal terminal, the first node, the first voltage signal terminal and a second node; a third control circuit electrically connected to the first node, the second voltage signal terminal, the third clock signal terminal and the second node; and a second output circuit electrically connected to the second node, the second voltage signal terminal and the scanning signal terminal.

Abstract: The present disclosure provides an electronic device including a first substrate, a second substrate, a first demultiplexer unit, an integrated circuit chip, a sensor unit and a second demultiplexer unit. The second substrate is overlapped with the first substrate. The first demultiplexer unit is disposed on the first substrate. The integrated circuit chip is disposed on the first substrate and electrically connected to the first demultiplexer unit. The sensor unit is disposed on the second substrate. The second demultiplexer unit is disposed on the second substrate and electrically connected to the sensor unit.

Abstract: A hybrid switch for a power converter and a method of operating said hybrid switch, the hybrid switch comprising: at a minimum a first and a second element comprising one or more switching devices of a first semiconductor type, and at a minimum a third element comprising one or more switching devices of a second semiconductor type, wherein the second semiconductor type is different from the first semiconductor type, and wherein each element is independently configurable and connected to a separate respective control terminal; and, a controller connected to the control terminals, wherein the controller is configured to control each element independently through each respective control terminal, and wherein the controller is further configured to activate elements based on a measured or estimated current and/or power as required by an operating condition of the converter.

Abstract: Disclosed herein are silicon-on-insulator (SOI) switches and associated control circuits having level shifters configured to provide increased voltages (positive and/or negative) to the switches. The disclosed level shifters can be configured to provide increased voltages and can be used with high-linearity switches and/or can improve the linearity of switches. The improved switch performance can improve front end module performance for applications such as carrier aggregation (CA) and multiple input multiple output (MIMO) as well as with protocols such as Long-Term Evolution Advanced (or LTE-A).

Abstract: A control method for a backlight circuit includes: obtaining a plurality of pieces of dimming data in a preset period of time; determining total accumulated electric energy received by the backlight source according to the plurality of pieces of dimming data in the preset period of time; and generating a first voltage control signal when the total accumulated electric energy reaches a preset electric energy threshold. The dimming data is used to control a backlight source to emit light. The preset period of time is from an initial moment of continuous light emission of the backlight source to a current moment. The first voltage control signal is used to reduce the working voltage of the backlight source. When the total accumulated electric energy reaches the preset electric energy threshold, reducing the working voltage of the backlight source does not affect a light emitting brightness of the backlight source.

Abstract: A circuit includes a first and a second solid state electronic device arranged in a bridge-leg configuration, each selectively operable as a control switch and synchronous switch and each selectively operable in an ON state and OFF state. A driver circuit is operably connected with at least the first solid state electronic device for controlling operation of at least the first solid state electronic device. A signal modulation circuit is operably connected with or between the driver circuit and the first solid state electronic device and includes an input operably connected with the driver circuit, an output operably connected with the first solid state electronic device, and a variable resistance circuit operably connected between the input and the output and operably connected with the driver circuit. A resistance of the variable resistance circuit is adjustable by the driver circuit to prevent spurious operation of the first solid state electronic device.

Abstract: Fast turn-on protection of a cascode switch is presented herein. A cascode circuit includes a depletion mode field effect transistor and an enhancement mode field effect transistor electrically coupled in cascode. During turn-on, a protection circuit detects an overcurrent fault by observing a plateau of a cascode node voltage. An overcurrent fault may be detected in response to the plateau existing for greater than a threshold time duration.

Abstract: An electronic device uses, as power, a first voltage and a second voltage lower than the first voltage. The electronic device includes: an internal circuit configured to be driven by the second voltage, and output an output signal having a level corresponding to the second voltage; and an interface circuit configured to receive the output signal, the first voltage, and the second voltage, shift the output signal to a level corresponding to the first voltage, and provide the shifted output signal to a pad. The interface circuit includes an ESD (electrostatic discharge) block connected to the pad. The interface circuit further includes a plurality of transistors, and all of the transistors of the interface circuit are driven at the second voltage and broken at the first voltage.

Abstract: A modular parallel half-bridge integrated assembly with an annular layout is provided. The assembly includes a plurality of parallel sub-modules to improve a current capacity of the assembly. The sub-modules adopt an annular layout and are connected in parallel to balance currents of the sub-modules. The half-bridge integrated assembly includes a plurality of sub-modules, a plurality of heat sinks, a drive board, a direct current (DC) positive collecting busbar, a DC negative collecting busbar, and an alternating current (AC) collecting busbar. According to the assembly, since each insulated gate bipolar transistor (IGBT) is tightly bound to a capacitor, parasitic inductance of a commutation loop is small, realizing a small voltage overshoot and a fast switching speed for the IGBT module, so as to balance the currents of the sub-modules.

Abstract: A display panel and a gate driving circuit are provided. The gate driving circuit utilizes the pull-down control module to periodically pull up and pull down the voltage level of the second node. The voltage level of the second node is periodically a high voltage level. This effectively reduces the time duration when the second node corresponds to the high voltage level. After the TFTs electrically connected to the second node are forward biased, the TFTs could have sufficient recovery time. This solution effectively improves the bias condition of the TFTs in the pull-down control module and thus makes the circuit more stable and raises the reliability of the circuit.

Abstract: A semiconductor package includes a VLSI semiconductor die and one or more output circuits connected to supply power to the die mounted to a package substrate. The output circuit(s), which include a transformer and rectification circuitry, provide current multiplication at an essentially fixed conversion ratio, K, in the semiconductor package, receiving AC power at a relatively high voltage and delivering DC power at a relatively low voltage to the die. The output circuits may be connected in series or parallel as needed. A driver circuit may be provided outside the semiconductor package for receiving power from a source and driving the transformer in the output circuit(s), preferably with sinusoidal currents. The driver circuit may drive a plurality of output circuits. The semiconductor package may require far fewer interface connections for supplying power to the die. Multi-output POL circuits may be used in conjunction with on-chip rail-selection and regulation circuitry to further improve efficiency.

Abstract: Described herein are lateral III-N (e.g., GaN) devices having a III-N depleting layer. A circuit includes a depletion-mode transistor with a source connected to a drain of an enhancement-mode transistor. The gate of the depletion-mode transistor and the gate of the enhancement-mode transistor are biased at zero volts, and the drain of the depletion-mode transistor is biased at positive voltage to block a current in a forward direction. Then, the bias of the gate of the enhancement-mode transistor is changed to a first voltage greater than the threshold voltage of the enhancement-mode transistor and a first current is allowed to flow through the channel in a forward direction. Then, the bias of the gate of the depletion-mode transistor is changed to a second voltage and a second current is allowed to flow through the channel in a forward direction where the second current is greater than the first current.

Abstract: Charging and discharging circuits for assisting charge pumps are disclosed. In certain embodiments, a radio frequency (RF) switch system includes an RF switch that receives an RF signal and is controlled by a switch control signal received at an input, a first charge pump configured to generate a first charge pump voltage, a level shifter powered by the first charge pump voltage and that generates the switch control signal based on a switch enable signal, and a charge pump assistance switch coupled to the input of the radio frequency switch and that activates to assist the first charge pump in response to a transition of the switch enable signal from a first state to a second state.

Abstract: An electronic circuit for controlling a power switch having a gate input, includes a signal generator configured to generate a gate driver input signal. The gate driver input signal has a first voltage during a first period of time, a second voltage during a second period of time, and toggles between the first voltage and the second voltage during a third period of time. The electronic circuit also includes a gate driver configured to receive the gate driver input signal and to provide a gate driver output signal based on the gate driver input signal. The signal generator is configured to cause the gate driver input signal to toggle during the third period of time such that the gate driver output signal has a third voltage during the second period of time, and an intermediate voltage that is less than the third voltage during the third period of time.

Abstract: A power semiconductor module includes a semiconductor switching element, a gate control pattern to which a gate electrode of the semiconductor switching element is connected, a source control pattern to which a source electrode of the semiconductor switching element is connected, a capacitor to form a low-pass filter, a capacitor arrangement pattern to which one end of the capacitor is connected, and a wire. The other end of the capacitor is connected to the source control pattern. The wire electrically connects the capacitor arrangement pattern and the gate control pattern.

Abstract: A display device includes a plurality of pixels and a control circuit configured to control brightness of the plurality of pixels. Each of the plurality of pixels includes a light-emitting element and a pixel circuit configured to control light emission of the light-emitting element. The pixel circuit includes a driving transistor configured to supply electric current to the light-emitting element, and a storage capacitor configured to store voltage to control the electric current to be supplied by the driving transistor to the light-emitting element. The control circuit is configured to determine a statistic of brightness of pixels specified by one or more video frames with a predetermined method, determine a length of a threshold compensation period for which the storage capacitor applies threshold compensation to the driving transistor based on the statistic, and control the pixel circuit based on the threshold compensation period.

Abstract: A drive circuit for a switch drives an upper-arm switch and a lower-arm switch that include body diodes. Of the body diodes in upper- and lower-arm switches, the diode through which a feedback current flows during a dead time is a target diode. Of the upper- and lower-arm switches, the switch that includes the target diode is a target switch. The remaining switch is an opposing arm switch. The drive circuit maintains an electric potential of a control terminal relative to a second terminal of the target switch at a negative voltage over a period from a timing subsequent to a start timing of a dead time immediately after the target switch is switched to an off-state until a point within a period over which the opposing arm switch is set to an on-state, and subsequently maintains the electric potential at an off-voltage until a next dead time is ended.

Abstract: This application provides a power supply system for a motor control module and a vehicle. The power supply system includes a first current limiting unit and an isolation unit. An output end of a first direct current power supply is coupled to a first input end of the isolation unit to form a first power supply loop with the isolation unit. A first output end of a second direct current power supply is coupled to one end of the first current limiting unit. Another end of the first current limiting unit is coupled to a second input end of the isolation unit to form a second power supply loop with the isolation unit. The second power supply loop is connected in parallel to the first power supply loop.

Abstract: A circuit includes a first gate control circuit including a first time delay element and first and second logic gates. The first time delay element and first and second logic gates receive a pulse width modulation (PWM) signal. The first logic gate includes a first output and second logic gate includes a second output. The circuit also includes a second gate control circuit that includes a second time delay element and third and fourth logic gates. The second time delay element includes an input coupled to the output of the first time delay element. The third logic gate includes a third output, and the fourth logic gate includes a fourth output. A first gate driver receives a first signal from one of the first or third outputs. A second gate driver receives a second signal from one of the second or fourth outputs.

Abstract: A power-saving system includes a retention memory element for a retained peripheral that is set to a logic state during an operational-power mode and maintains the logic state during an enhanced power-saving mode. The power-saving system also includes a non-retention memory element for a non-retained peripheral that is set to a logic state during the operational-power mode of the power-saving system; and a controller that instructs the retention memory element to maintain its logic state while in an enhanced power-saving mode.

Abstract: A device includes an interface circuit connected between a pad and an internal circuit. The interface circuit comprises a pull-up driver including first and second PMOS transistors and a first impedance controller. The first PMOS transistor is connected between a power terminal provided to a power voltage and a first connection node and controlled by a first control bias. The second PMOS transistor connected between the first connection node and the pad and normally turned-on, and the first impedance controller is connected to the first connection node to control an impedance thereof based on the first control bias. The interface circuit further includes a pull-down driver including first and second NMOS transistors. The first NMOS transistor is connected between the pad and a second connection node and controlled by a driving voltage, and the second NMOS transistor is connected between the second connection node and a ground voltage terminal.

Abstract: A control method of a switching circuit, a control circuit of the switching circuit and the switching circuit are provided. The control circuit includes a slope buffer and a first operational amplifier. The slope buffer receives a first voltage reference, and controls slopes of a rising edge and a falling edge to generate a second voltage reference. The first operational amplifier receives an output feedback voltage and a reference voltage, and performs an operational amplification to obtain a compensation voltage. When the first voltage reference has the falling edge, the reference voltage is coupled to the first voltage reference through a first switch, and the second voltage reference is coupled to an output voltage through a second switch. When the first voltage reference has the rising edge, the reference voltage is coupled to the second voltage reference through a third switch.

Abstract: Methods and devices to improve the switching speed of radio frequency FET switch stacks are disclosed. The described methods and devices are based on bypassing drain-sources resistors when the FET switch stack is transitioning from an ON to an OFF state. Several implementations of the disclosed teachings are also presented.

Abstract: Described herein are apparatuses and methods for applying high voltage, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., using a high voltage (e.g., MOSFET) gate driver circuit having a high voltage isolation and a low inductance. In particular, described herein are multi-core pulse transformers comprising independent transformer cores arranged in parallel on opposite sides of a substrate. The transformer cores may have coaxial primary and secondary windings. Also describe are pulse generators including multi-core pulse transformers arranged in parallel (e.g., on opposite sides of a PCB) to reduce MOSFET driver gate inductance.

Abstract: Electrical installation comprising a monitoring module positioned between a sensor connected to a measurement cable and first and second power supply cables for the sensor. The monitoring module comprises a first transistor comprising a first and a second power electrode and a control electrode, the first and the second power electrodes of the first transistor being electrically connected to the second power supply cable and to the measurement cable, respectively, so that, when the first transistor is in the closed state thereof, a first fault value is generated on the measurement cable. The control electrode of the first transistor is connected to the first power supply cable so that the loss of first potential on the first power supply cable, caused by the interruption thereof, automatically triggers the switching of the first transistor to the closed state thereof.

Abstract: A gate driver includes at least one stage, which includes: a first output circuit configured to supply a voltage of a first power source or a voltage of a second power source to a first output terminal and including a fourth capacitor connected between a second node and the first output terminal; a second output circuit configured to supply a signal supplied to a fourth input terminal or the voltage of the second power source to a second output terminal; an input circuit configured to control a voltage of the second node and a voltage of a third node; a first signal processor configured to control a voltage of a first node; a second signal processor configured to control the voltage of the second node; and a third signal processor connected between the first node and the third node, and configured to control the voltage of the first node.

Abstract: A gate driver on array (GOA) circuit and a display panel are provided. The GOA circuit provides a pull-up maintaining module including transistors T11, T12, and T13. In a pre-charge sub-phase t1 and an output sub-phase t2, a node Qb is at a high level to pull down a node P and turn off the transistor T13. A node K changes to the high level under control of the transistor T11. The transistor T12 is turned on, and the node Qb is keeping at the high level. A node Qa is keeping at the high level in the pre-charge sub-phase, and keeping at a bootstrap electrical level in the output sub-phase.

Abstract: The disclosure relates to a switched capacitor converter (SCC) with gate driving circuits for limiting currents provided by switching field effect transistors. Embodiments disclosed include an SCC with gate driver curcuits providing gate voltage signals to power FETs, each gate driver circuit comprising first and second gate driver modules and configured to operate in: a first mode in which the first gate driver module provides a gate voltage signal to a power FET that switches between first and second voltage rails by operation of first and second switches connected between the pair of voltage rails; and a second mode in which, in reponse to enabling of a current limit switching signal, the first gate driver module disables switching of one of the first and second switches and the second gate driver module operates to limit a current provided to the power FET.

Abstract: A gate driver includes active stages that output gate signals to a display part and pre-stages connected to the active stages to output carry signals to the active stages. The pre-stages include a first pre-stage and a second pre-stage. The second pre-stage includes a Q node compensator that receives a clock signal from the first pre-stage and compensates for a voltage of a Q node based on the clock signal of the first pre-stage. The Q node compensator includes a feedback transistor that diode-connects a feedback input terminal, which receives the clock signal of the first pre-stage, to a feedback node of the second pre-stage. The feedback transistor includes a first electrode, a second electrode, and a third electrode, where the first electrode is connected to the feedback input terminal, the second electrode is connected to the first electrode, and the third electrode is connected to the feedback node.

Abstract: A shift device mounted on a vehicle includes a motor configured to drive, by electric power supplied from a power supply mounted on the vehicle, a shift switching member configured to switch shift positions, a cut-off unit configured to cut off conduction of a power supply line through which the electric power is supplied to the motor, and a drive circuit unit configured to output the electric power to the motor and including a driving switching element configured to execute a switching operation. The shift device is configured to determine an abnormality of the power supply line when a voltage of the power supply line is smaller than a predetermined threshold value, turn off the driving switching element, and cut off the conduction of the power supply line by the cut-off unit.

Abstract: A system includes a level shifter coupled to a voltage source, a first transistor, and a second transistor. The system also includes a first current source coupled to the first transistor and the second transistor and configured to bias the first transistor and the second transistor. The system includes a slew detector coupled to the voltage source and to the first current source, where the slew detector is configured to detect a change in voltage of the voltage source, and further configured to provide current to the first current source responsive to detecting the change. The system also includes a second current source coupled in parallel to the first current source, where the second current source is configured to provide current to the first current source responsive to a control signal.

Abstract: In one example, an apparatus comprises: a voltage sensing circuit having a voltage sensing terminal and a voltage sensing output, the voltage sensing circuit configured to generate a first voltage at the voltage sensing output representing a second voltage at the voltage sensing terminal; a control circuit having a control circuit input and a control circuit output, the control circuit input coupled to the voltage sensing output, the control circuit configured to: determine a state of a transistor based on the first voltage; and generate a driver signal at the control circuit output based on the state; and a driver circuit having a driver input and a switch control output, the driver input coupled to the control circuit output, the driver circuit configured to provide a current at the switch control output responsive to the driver signal.

Abstract: Examples of contactor controllers, systems and methods time-modulate levels of high-side (HS) and low-side (LS) clamp voltages in a contactor controller to switch a path through which current flows during quick-turn-off (QTO) of the contactor controller. One of the clamp voltages is at a high level and the other is at a low level. The output voltage of the contactor controller is held at the low level. The path switching may be a function of one or more parameters. In a configuration, the level of a supply voltage of the contactor controller is monitored and used to control the path switching. In a configuration, temperatures of HS and LS transistors of the contactor controller are monitored and used to control the path switching. Control of the path switching may be performed to dissipate power in a larger area to increase thermal performance of the contactor controller. Both clamps may remain active throughout the QTO process, providing redundancy and safety.

Abstract: A method of controlling a switch, including: a) applying a control signal to a control terminal of the switch, said control signal exhibiting at least one first switching between a switch turn-on control state and a switch turn-off control state; and b) applying a switch turn-off potential on said control terminal after a first delay starting at said first switching, the first delay being greater than the turn-off time.

Abstract: A control device for a converter including a one-phase or multiple-phase converter circuit includes: a magnetic coupling determination unit configured to determine whether the converter circuit is a magnetically coupled circuit in which a reactor of the converter circuit is in a magnetically coupled state; and a control unit configured to change a control method for the converter according to a determination result of the magnetic coupling determination unit.

Abstract: A gate driving circuit and a display panel are provided. The gate driving circuit reduces the number of transistors through the inverter in the pull-down maintaining circuit such that the number of the signal output ends connected to the inverter is reduced. In this way, the number of the other transistors in the pull-down maintaining circuit is also reduced. Therefore, the number of the transistors and the number of the signal output ends of the pull-down maintaining circuit are both reduced. This means that the number of the transistors and the number of the signal output ends of the gate driving circuit are both reduced.

Abstract: A current sensing circuit and a minimum operating frequency for a wireless power transmission system is presented. A method of measuring current through a wireless power transmit coil, includes receiving a signal from a switching circuit into a sampling circuit; filtering the sampled signal from the sampling circuit; biasing the filtered sampled signal, wherein the biasing occurs only when the sampling circuit is active; and amplifying the biased signal to provide a transmit coil current signal. A method of measuring current through a wireless power transmit coil, includes receiving a signal from a switching circuit into a sampling circuit; filtering the sampled signal from the sampling circuit; biasing the filtered sampled signal, wherein the biasing occurs only when the sampling circuit is active; and amplifying the biased signal to provide a transmit coil current signal.

Abstract: A display system includes a first memory and a display driver. The display system is configured to control the first memory to receive compensation information from the first memory with a first slew rate and generate data signals for image data to be displayed on a display panel. The generation of the data signals comprises performing a compensation for the data signals based on the compensation information received from the first memory. The display driver is further configured to update pixels of the display panel with the data signals during an active display state. The display driver is further configured to generate updated compensation information based at least in part on the image data and the compensation information received from the first memory and transmit the updated compensation information to the first memory during the active display state with a second slew rate lower than the first slew rate.

Abstract: A pre-charge control circuit includes a control unit, a conversion unit, and a pre-charge switch. The control unit provides a control signal according to a PWM signal, and the conversion unit provides a control voltage according to the control signal. The pre-charge switch adjusts a magnitude of the current flowing through the input path of the electronic circuit according to the control voltage.

Abstract: In an embodiment, a switching circuit is provided that includes a Group III nitride-based semiconductor body including a first monolithically integrated Group III nitride-based transistor device and a second monolithically integrated Group III nitride based transistor device that are coupled to form a half-bridge circuit and are arranged on a common foreign substrate having a common doping level. The switching circuit is configured to operate the half-bridge circuit at a voltage of at least 300 V.

Abstract: An electrical switching system includes a constant-power controller and a switching device electrically coupled between a first node and a second node. The constant-power controller is configured to (a) generate a digital control signal to control the switching device, (b) control a duration of an active phase of the digital control signal at least partially based on a voltage across the switching device, and (c) control a peak value of the digital control signal to regulate a peak magnitude of current flowing through the switching device.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for a multi-level turn-off circuit. An example power delivery circuit includes a two-level turn-off circuit to be coupled to a first switch to reduce a first gate voltage of the first switch from a first voltage to a second voltage when a current flowing through the first switch is greater than an over-current threshold, the two-level turn-off circuit including a second switch, a voltage-current-voltage buffer to reduce a second gate voltage of the second switch from a third voltage to a fourth voltage, and a comparator circuit to turn off the second switch when the second gate voltage is the fourth voltage, and a driver to be coupled to the first switch to turn off the first switch when the second gate voltage is the fourth voltage.

Abstract: A power converter is provided. The power converter includes two or more hybrid switching circuits electrically connected to a source or storage element. Each switching circuit includes a wide bandgap device that is parallel-connected to a silicon-based device. The converter further includes a controller that is operatively coupled to each device of the first and second switching circuits. The controller is configured to operate each hybrid switching circuit by (i) activating the silicon-based device for an activation period, (ii) activating the wide bandgap device for a predetermined duty cycle less than the activation period, (iii) deactivating the silicon-based device while the wide bandgap device is activated, and (iv) deactivating the wide bandgap device. The hybrid switching circuits are sequentially operated to convert an alternating current of a power supply into a link voltage for a power converter, for example.

Abstract: A drive circuit has a control signal input for receiving a first control signal at a first circuit input, an optocoupler which is connected to the control signal input and which is adapted to generate a galvanically decoupled second control signal in accordance with the first control signal, an output circuit for controlling at least one circuit output terminal of the drive circuit in accordance with a third control signal, and an electronic control circuit comprising an energy supply, an input for receiving the second control signal, and an output for outputting the third control signal in accordance with the second control signal received at the input.

Abstract: A system and method for measuring optical power is described. The optical system and method may include a module configured to generate a secondly modulated signal based on secondly modulating a firstly modulated signal with an amplitude modulated signal. The firstly modulated signal may include data that is modulated for transmission by a laser diode array. The firstly modulated signal may then be secondly modulated using amplitude modulation techniques. The system may further include a photodiode configured to generate a photodiode current based on optically sensing a laser diode array. The laser diode array outputs an optical output power based on being driven by the secondly modulated signal. The system may yet further include a controller configured to calculate the optical output power from the photodiode current based on the amplitude modulated signal.

Abstract: The invention provides a voltage-following series power supply circuit, comprising a power supply end and a ground end; a power supply module comprising an input end connected to the power supply end, and an output end for providing a power supply to two or more to-be-powered chips, the power supply module and the to-be-powered chips connected in series between the power supply end and the ground end; and at least one auxiliary power supply module for supplying an auxiliary power supply to the to-be-powered chips, wherein a voltage following module is further connected between the power supply end and the auxiliary power supply module for adjusting a voltage of the auxiliary power supply.

Abstract: An apparatus leverages the existing power interconnect for DC power delivery by including a persistent DC power module into a power panel, thereby enabling a more efficient use of the energy. The persistent DC power module includes, in part, a control unit which is adaptive to the variations and availability of the external DC power source to ensure a constant and consistent delivery of DC voltage. The apparatus minimizes energy waste and e-waste, and is compatible with the existing legacy AC infrastructure.