Topic
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.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors derived results of a simpler nature, which do not require a consideration of the distribution of the signal and noise energies as functions of frequency, and discussed the solution of the general problem.
Abstract: When the input to a rectifier contains both signal and noise components, the resultant output is a complicated non-linear function of signal and noise. Given the spectra of the signal and noise input waves, the law of rectification, and the transmission characteristics of the input and output circuits of the rectifier, it should, in general, be possible to describe the spectrum of the resultant output wave. Before discussing the solution of the general problem, we shall derive some results of a simpler nature, which do not require a consideration of the distribution of the signal and noise energies as functions of frequency.
44 citations
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01 Dec 2016TL;DR: In this article, a metal object detection (MOD) circuit with non-overlapped coils was proposed to ensure safe operation of a wireless EV chargers, which is composed of a variable resistor, a low pass filter, and a precision rectifier with amplification for accurate data acquisition.
Abstract: In the inductive power transfer (IPT) system operation, overheating of metal objects caused by eddy current may cause ignition, resulting in fire or damages to the equipment. Therefore, a metal object detection (MOD) circuit with non-overlapped coils to ensure safe operation of a wireless EV chargers is proposed in this paper. The proposed MOD circuit is composed of a variable resistor, a low pass filter, and a precision rectifier with amplification for accurate data acquisition. Influence of metal object under alternating magnetic field is described with respect to various thickness and types of metal objects. The proposed MOD circuit was experimentally verified using three non-overlapped coils and a 4cm × 4cm metal object, where its output voltage was changed from 200 mV to 1V. The MOD circuit can detect multiple metal objects at the same time and is suitable for high power wireless EV chargers.
44 citations
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TL;DR: Steady-state and transient analyses of the rectifier with the diode described by an exponential I-V characteristic are presented and formulas for the dc output voltage level, the output voltage ripple, and the power conversion efficiency are provided.
Abstract: This paper describes a simple analytical model of the rectifier circuit valid down to very low voltage operation (input voltage below the thermal voltage). Steady-state and transient analyses of the rectifier with the diode described by an exponential I-V characteristic are presented. We provide formulas for the dc output voltage level, the output voltage ripple, and the power conversion efficiency. We also give a compact expression for the charging time of the load capacitor. The models of the rectifier and the voltage doubler for input voltages down to the thermal voltage are verified with simulations and measurements using circuits built with off-the-shelf 1N4148 diodes.
44 citations
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23 Aug 2000
TL;DR: In this article, a rectifier circuit is used to acquire driving electric power for its own apparatus from the electromagnetic wave received at the antenna circuits, and a constant voltage circuit is employed to convert the output voltage of the rectifier to a constant value.
Abstract: PROBLEM TO BE SOLVED: To expand operable region of an electromagnetic field receiving apparatus. SOLUTION: Antenna circuits 20, 21 receive electromagnetic waves transmitted from an electromagnetic field transmission apparatus 1. A rectifier circuit 22 acquires driving electric power for its own apparatus from the electromagnetic wave received at the antenna circuits 20, 21. A constant voltage circuit 23 converts the output voltage of the rectifier circuit 22 to a constant voltage. An impedance control circuit 31 repeats a control action which changes an impedance of its own apparatus so that the output voltage of the rectifier circuit 22 becomes equal to the desired voltage set value, thereby controls a quantity of received power from the electromagnetic field transmission apparatus 1.
44 citations
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23 May 2010TL;DR: In this article, a UHF RFID rectifier which turns on at near zero input voltage is demonstrated, achieving a peak power conversion efficiency (PCE) of 71.5% at 915MHz with a RF input of −4 dBm and a 30 kΩ load.
Abstract: A UHF RFID rectifier which turns on at near zero input voltage is demonstrated. The rectifier is fabricated in 0.25-µm silicon-on-sapphire (SOS) CMOS technology using intrinsic, near zero threshold devices. A novel improved cross-coupled bridge topology is used to minimize the leakage incurred through the use of intrinsic devices while maintaining their low power turn on characteristics. The fabricated rectifier demonstrates a peak power conversion efficiency (PCE) of 71.5% at 915MHz with a RF input of −4 dBm and a 30 kΩ load. More importantly, a PCE ≫ 30% was measured for all RF input powers between −28 and −4 dBm demonstrating state-of-the-art efficiency across a wide range of input powers.
44 citations