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 Full-Wave Rectifier for Interfacing with Multi-Phase Piezoelectric Energy Harvesters

Abstract: This paper describes an asynchronous full-wave rectifier for use with a multiple-electrode disk-shaped piezoelectric generator. By using quarter-circle shaped electrodes, similar to an ultrasonic motor, multiple output voltage phases are obtained from a single resonating piezoelectric disk. Two-electrode transducer outputs are often rectified using a full-wave diode bridge rectifier, which requires a significant voltage drop between input and output, decreasing the rectifier's voltage efficiency. Previous asynchronous rectifiers use MOS switches to avoid the diode drop, however they lack the ability to efficiently rectify the multiple output phases generated from a disk-shaped transducer. Other CMOS rectifiers need two input waveforms that are equal and opposite, which a piezoelectric transducer may not generate for many input vibrations.

Class-E rectifier using thinned-out method

Abstract: A new control method of a class-E rectifier is presented, which regulates the output voltage or power with elimination of the voltage pulse of the rectifier at a constant rate. When the class-E rectifier controlled by this method is used in a class-E DC/DC power converter, both the inverter and rectifier operate under zero-voltage-switching conditions. Since the rectifier is controlled by a synchronized switch, it achieves the following advantages: (1) power efficiency for low-output voltage is improved; (2) output voltage and power are controllable at a fixed operating frequency; and (3) switching noise can be reduced. Additionally, this method is suitable for applications in which the output voltage or power are changed immediately because the output voltage and power are controlled by means of replacements of pulse patterns. The output characteristics of the rectifier are analyzed under a condition that the amplitude of the input current is constant. Experimental results show good agreement with the theoretical results.

Uninterruptible power supply having solid state transfer switch and method of operation thereof

Abstract: An uninterruptible power supply (UPS) for supplying DC power to a load and a method of providing uninterruptible DC power to a load. In one embodiment, the UPS includes: (1) a first stage rectifier that rectifies AC input power received from a primary power source into DC power at an intermediate voltage, (2) a second stage rectifier, coupled to the first stage rectifier, that converts the DC power at the intermediate voltage into DC power for the load at an output voltage that is lower than the intermediate voltage and (3) a solid state transfer switch, coupled between the first stage rectifier and the second stage rectifier, that transfers secondary input power received from a secondary power source to the second stage rectifier only when a voltage of the secondary input power exceeds the intermediate voltage.

Electronic power converter for triac based controller circuits

Abstract: A ballast circuit operable with a triac based controller circuit, the ballast circuit (100) includes a rectifier (115) configured for operative connection with an associated triac based circuit (110) for converting AC current to DC current, a capacitor assembly (137) coupled to the rectifier (115), a first connection (150) between the rectifier and the capacitor assembly (137), a converter (153) coupled to the rectifier (115) for converting the DC current to AC current, a gate drive arrangement coupled to the converter for controlling the converter (153), a resistance-inductance circuit (163) coupled to the converter (153), and a second connection (165) between the capacitor assembly (137) and the resistance-inductance circuit (163). The converter (153) induces AC current in the resistance-inductance circuit (163).

CMOS dual output current mode half-wave rectifier

Abstract: A CMOS dual output current mode half-wave rectifier is presented. The proposed rectifier is composed of three main components: a dual output V–I converter, two half-wave current rectifiers and two I–V converters. A voltage input signal is changed into two current signals by the V–I converter. The current rectifiers rectify these current signals, resulting in positive and negative half-wave current signals that are converted to positive and negative half-wave voltage signals by the I-Vconverters. The theory of operation is described, and the simulated results obtained from the PSPICE program are used to verify the theoretical prediction. Simulated rectifier performance with a 0.5μm MOSFET model using ±1.2V supply voltage demonstrates good rectifier integrity at operating frequencies up to 100MHz.