A circuit and methods describing a complementary metal-oxide semiconductor (CMOS) rectifier for use in radio frequency (RF) energy harvesting with body biasing by the RF input to control the threshold voltage of each transistor. The CMOS rectifier includes an energy harvesting antenna, and multiple rectifier stages. The antenna receives electromagnetic radiation from the environment and generates a DC current. The oscillating input current is an RF.sup.+ positive current during a first half cycle and is an RF.sup.? negative current during a second half cycle. A first rectifier stage includes a first capacitor connected to the RF.sup.+ positive current, a second capacitor connected to the RF.sup.? negative current and a cross coupled CMOS circuit connected to the antenna.

An integrated circuit for a power supply circuit configured to generate an output voltage of a target level from an alternating current (AC) voltage. The power supply circuit includes a first capacitor and an inductor configured to receive a voltage according to the AC voltage, and a transistor configured to control an inductor current flowing through the inductor. The integrated circuit is configured to switch the transistor, and includes: an identification circuit configured to identify whether a voltage level of an effective value of the AC voltage is a first level or a second level, and a signal output circuit configured to output a driving signal to drive the transistor, and correct the driving signal to thereby correct the input current, in response to the voltage level of the effective value being the first level and the second level, respectively.

The invention discloses a power conversion circuit and a power supply device. The power conversion circuit is applied to a power supply device, comprising: an AC/DC conversion circuit, wherein a DC side of the AC/DC conversion circuit has a first reference potential point; a first common-mode inductor; a DC/DC conversion circuit including a primary circuit having a second reference potential point, a secondary circuit and a transformer; wherein a first terminal of the first common-mode inductor is connected to the DC side of the AC/DC conversion circuit, and a second terminal of the first common-mode inductor is connected to the primary circuit of the DC/DC conversion circuit; the first reference potential point or the second reference potential point is connected to an electric field shield.

According to one embodiment, a power conversion device includes: a plurality of DC-DC converter circuits configured to generate AC voltages at both ends of a plurality of first inductors by switching on a DC voltage and rectifies the AC voltages to output DC voltages; and a plurality of second inductors respectively magnetically coupled to the plurality of first inductors of the plurality of DC-DC converter circuits, wherein inputs and outputs of the plurality of DC-DC converter circuits are respectively connected in series and the plurality of second inductors are connected in parallel between two nodes.

A harmonic harvesting circuit design for harvesting un-rectified AC power contained in the fundamental and harmonic frequencies at the output of conventional rectifying circuits.

The present disclosure provides a method and apparatus using a novel PWM switching technique that requires only one PWM carrier signal and benefits from two logic functions to provide switching signals and provides the flying capacitor (FC) voltage as well as dc-link capacitors voltages regulated to their desired values without external control. It may also, eliminate the odd multiples of the switching harmonic clusters from the output voltage is possible; double the frequency of first switching harmonic; reduce filtering efforts may be required since the values of the output LC filter inductor and capacitor can be very much reduced. Furthermore, notable reduction in control complexity is possible using the novel PWM method.

Synchronous rectifiers for wireless power receivers are disclosed herein. An example receiver includes: an antenna configured to receive power transmission waves; and a synchronous rectifier coupled to the antenna and configured to synchronously rectify an alternating current (AC) voltage of the power transmission waves to generate a direct current (DC) voltage, wherein the synchronous rectifier includes: a first diode configured to receive a first portion of the AC voltage that has a positive polarity; a second diode configured to receive a second portion of the AC voltage that has a negative polarity; a first transistor coupled with the first diode; a second transistor coupled with the second diode; and circuitry configured to introduce a timing delay between driving the first and second transistors. The receiver also includes a boost converter in communication with the synchronous rectifier, the converter configured to match an impedance of a load associated with the receiver.

A power supply device includes a transformer including a primary winding, a secondary winding and an auxiliary winding, first, second and third circuits, and a switch. The first circuit in which a first capacitor and a first rectifier are connected in series is connected to the primary winding in parallel. The switch of which one end is connected to one end of the primary winding. The second circuit in which the auxiliary winding and a second rectifier are connected in serial is connected between a connecting point, to which the first capacitor and the first rectifier are connected, and the other end of the switch. The third circuit including a resistor and a third rectifier is connected to a gate of the switch. In the third circuit, a resistance value in a direction where a current flows into the gate of the switch is smaller than that in a direction where the current flows out of the gate.

Wall mountable touch panels are described. In one embodiment, a wall mountable touch panel for controlling a load device includes a touch sensor configured to receive a user touch input and to control the load device based on the user touch input and a power interface configured to receive a low-voltage direct current (DC) power signal for powering the touch sensor. Other embodiments are also described.

The present invention relates in a first aspect to a galvanically isolated power converter assembly comprising a first set of electrically interconnected resonant power inverters configured for generating respective output voltages and output currents. The galvanically isolated power converter assembly further a first positive summing node and a first negative summing node configured to combining the output voltages and output currents of the first set of resonant power inverters and a first common load circuit comprising a positive load input and a negative load input. A galvanic isolation barrier comprises first and second common isolation capacitors electrically insulating the common load circuit. Each of the first and second common isolation capacitors possesses an official safety rating.