Unique systems, methods, techniques and apparatuses of a power converter are disclosed. One exemplary embodiment is an electrical power conversion system comprising a first converter stage, a second converter stage, a third converter stage, and a control system. The first converter stage is operable to boost DC power received from a DC power source. The second converter stage is operable to boost DC power received from the first converter stage. The third converter stage includes an inverter. The control system is structured to receive as input voltage (V.sub.pv) and current (I.sub.pv) output by the DC power source, voltage (V.sub.dc) output by the second controller stage, and voltage (V.sub.ac) and a current (I.sub.ac) which are output by the third stage to an AC electrical power system, provide a control command for the first converter stage, and process the information of V.sub.dc, V.sub.ac and I.sub.ac to provide control commands for the inverter switches.

Unique systems, methods, techniques and apparatuses of a power converter are disclosed. One exemplary embodiment is an electrical power conversion system comprising a first converter stage, a second converter stage, a third converter stage, and a control system. The first converter stage is operable to boost DC power received from a DC power source. The second converter stage is operable to boost DC power received from the first converter stage. The third converter stage includes an inverter. The control system is structured to receive as input voltage (V.sub.pv) and current (I.sub.pv) output by the DC power source, voltage (V.sub.dc) output by the second controller stage, and voltage (V.sub.ac) and a current (I.sub.ac) which are output by the third stage to an AC electrical power system, provide a control command for the first converter stage, and process the information of V.sub.dc, V.sub.ac and I.sub.ac to provide control commands for the inverter switches.

Universal Serial Bus (USB) cable type detection and control techniques are disclosed. In an exemplary aspect, a device connected to a cable detects whether the cable is a legacy cable (i.e., a Type-A to Type-C cable). If the cable is a legacy cable, the device determines an appropriate current to draw based on whether the cable is compliant with the USB Type-C specification or non-compliant. Additional exemplary aspects of the present disclosure determine whether a connector adaptor has been put on a legacy cable and determines an appropriate current to draw based on the capabilities of the legacy cable. Still further aspects of the present disclosure evaluate not only the cable to see if the cable limits the current draw, but also evaluate a device at a distal end of the cable to verify if and how current may be drawn by such remote device from a mobile terminal.

Universal Serial Bus (USB) cable type detection and control techniques are disclosed. In an exemplary aspect, a device connected to a cable detects whether the cable is a legacy cable (i.e., a Type-A to Type-C cable). If the cable is a legacy cable, the device determines an appropriate current to draw based on whether the cable is compliant with the USB Type-C specification or non-compliant. Additional exemplary aspects of the present disclosure determine whether a connector adaptor has been put on a legacy cable and determines an appropriate current to draw based on the capabilities of the legacy cable. Still further aspects of the present disclosure evaluate not only the cable to see if the cable limits the current draw, but also evaluate a device at a distal end of the cable to verify if and how current may be drawn by such remote device from a mobile terminal.

Systems and methods for ultra-precision regulated voltage are provided. In one embodiment, a voltage regulated power supply device comprises: a precision reference voltage generator comprising a current regulator network supplying current into a voltage reference node, and a voltage regulator network applying a voltage potential to the voltage reference node, wherein at least one of the current regulator network or the voltage regulator network comprise a random variance statistical mitigation architecture; and a power amplifier coupled to voltage reference node, where the voltage reference node provides a constant voltage reference to the power amplifier.

A reference voltage buffer circuit includes an operational amplifier, a capacitor switching module, a first transistor and a second transistor. The operational amplifier includes two input terminals and an output terminal, where the two input terminals receive an input reference voltage and a feedback voltage, respectively. A gate electrode of the first transistor is coupled to the capacitor switching module, and a source electrode of the first transistor provides the feedback voltage. A gate electrode of the second transistor is coupled to the capacitor switching module, and a source electrode of the second transistor provides an output reference voltage. In addition, the operational amplifier generates a stable control voltage to the gate electrodes of the first transistor and the second transistors via the capacitor switching module while the output terminal of the operational amplifier is not directly connect to the gate electrodes of the first transistor and the second transistors.

A reference current generation part receives an adjustment signal representing a target current and generates a reference current having a current value which is corresponding to the adjustment signal. A detection current generation part generates a detection current having a current value which is m (where the m denotes 1 or more) times as large as a current value of the reference current. A detection voltage generation part with a first resistor generates a detection voltage having a voltage value corresponding to a voltage drop across the first resistor in response to a supply of the detection current. A monitor voltage generation part with a second resistor having a resistance value which is 1/n (where the n denotes greater than 1) times as large as a resistance value of the first resistor, and for generating a monitor voltage having a voltage value which is corresponding to a voltage drop across the second resistor in response to a monitor current supplied from outside of the adjustable reference current generator.

This disclosure provides a noise suppression circuit for suppressing a noise in a voltage signal. The noise suppression circuit comprises: a switch unit having a first terminal receiving the voltage signal and a second terminal; a capacitor having a first terminal connected to the first terminal of the switch unit and a second terminal grounded; and an analog front-end unit including an operational amplifier with a signal input terminal and a reference-voltage input terminal electrically connected to the second terminal of the switch unit; wherein the switch unit is controlled by a pulse signal.

This disclosure provides a noise suppression circuit for suppressing a noise in a voltage signal. The noise suppression circuit comprises: a switch unit having a first terminal receiving the voltage signal and a second terminal; a capacitor having a first terminal connected to the first terminal of the switch unit and a second terminal grounded; and an analog front-end unit including an operational amplifier with a signal input terminal and a reference-voltage input terminal electrically connected to the second terminal of the switch unit; wherein the switch unit is controlled by a pulse signal.

A high-efficiency digital voltage controller capable of providing monotonically-varying stepwise voltage, said controller comprises of a plurality of two-terminal voltage modules connected in series; within each module one or more two-terminal voltage cells of identical voltage each and connected in series; within each module a plurality of switches controllable to connect any number of the voltage cells in series to the output terminals of the voltage module; the ratios of the magnitudes of voltage of any one voltage cell between the voltage modules being substantially equal to integer values uniquely defined by present invention, according to the numbers of voltage cells in each of the voltage modules; said plurality of switches being controlled by a control module implemented in any suitable logic.