Precision rectifier

About: Precision rectifier is a research topic. Over the lifetime, 4952 publications have been published within this topic receiving 63668 citations. The topic is also known as: super diode.

A zero current switching reverse recovery circuit

Abstract: Disclosed is a circuit for preventing damage to a controllable switching circuit as a result of a reverse recovery current originating from a rectifier circuit coupled to the controllable switching element during recovery of the rectifier circuit. The damage prevention circuit includes a reactive impedance circuit coupled in parallel with the rectifier circuit for controlling a reverse recovery current from the rectifier circuit during recovery of the rectifier circuit. A second controllable switching element is employed to direct the reverse recovery current to the reactive impedance circuit in response to recovery of the rectifier. The second controllable switch also directs the reverse recovery current from the reactive impedance circuit to a load, wherein the reverse recovery current may be safely diminished.

Power processing interface for passive radio frequency identification system

Abstract: A power processing interface for a radio frequency identification system is provided. The power processing interface includes a resonance circuit for inducing a first signal transmitted from a terminal as an AC voltage, a first rectifier circuit electrically connected to the resonance circuit for converting the AC voltage into a DC voltage, a filter circuit electrically connected to the first rectifier circuit for generating an operating voltage in response to the DC voltage, a voltage-detecting circuit electrically connected to the filter circuit and the first rectifier circuit for detecting the magnitude of the operating voltage, a second rectifier circuit electrically connected to the resonance circuit, and a voltage-clamping modulation circuit electrically connected to the first rectifier circuit, the voltage-detecting circuit and the second rectifier circuit for controlling the conduction of the second rectifier circuit in response to the output of the voltage-detecting circuit so as to bypass the excessive current, and for providing a minimum voltage to the radio frequency identification system during the modulation process so as to keep the radio frequency identification system in a normal operation.

Drive circuit for synchronous rectifier and method of operating the same

Abstract: A drive circuit for driving a rectifier switch, a method of driving the rectifier switch and a power converter employing the drive circuit or the method. In one embodiment, the drive circuit includes (1) a blocking diode couplable to a bias energy source and configured to block reverse current flow thereto, (2) an inductor coupled to the rectifier switch, and (3) a switching circuit, coupled to the blocking diode and the inductor, configured to: (3a) resonantly transfer energy from the bias energy source to a control terminal of the rectifier switch via the inductor to turn the rectifier switch ON, and (3b) resonantly discharge the energy through the control terminal to turn the rectifier switch OFF.

The S-band GaN-based high power amplifier and rectenna for space energy transfer applications

Abstract: Gallium nitride (GaN) is one of the most significant elements to achieve effective use of energy in space not only for communications but also for power transmissions. This is because that GaN has the features such as high efficiency, high breakdown voltage, and harsh environment robustness and it is expected to fit the requirements for space use. Using GaN, the flexibilities for future missions in terms of size, weight, and power consumption etc. will be improved significantly. In this research, as a high power and high efficiency device, use of a GaN device was tried in a high power FET amplifier and in a single shunt rectifier diode. Circuits operating at S-band were designed, produced, and evaluated experimentally with the DC-RF conversion of 63.3% in the power amplifier and with the RF-DC one of 35.5% in the rectifier diode. A wireless power transmission (WPT) experiment using HPA and rectenna was conducted. As a result, it was confirmed that a battery could be charged up to 133.7 Ws in about 1500 s (25 min) by the DC power generated by the rectifier, where the EIRP was 57.2 dBm, the rectifier input power was 32.5 dBm, and the distance between a power transmitter and the receiver was 1.2 m.

Control technique for high power factor multilevel rectifier

Abstract: Three control techniques for a high power factor multilevel pulsewidth modulation (PWM) rectifier are proposed. The proposed rectifier is based on series connection of full-bridge cell to achieve a high power factor, low current distortion, low voltage stress of power semiconductors and two balanced output voltages. The look-up table is used in the proposed control schemes to reduce the hardware circuit. A capacitor voltage compensator is used to balance two dc capacitor voltages in order to obtain high quality PWM voltage pattern. Based on the proposed control schemes, two-level or three-level PWM pattern can be generated on the ac side of the adopted rectifier. The proposed techniques for a high power factor multilevel rectifier illustrate its validity and effectiveness through the respective simulations and experiments. According to the measured results, the current harmonics drawn from the mains meet the International Electrotechnical Commission (IEC) 1000-3-2 limits.