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
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Patent•
02 Jan 2003
TL;DR: In this article, an adaptive speech filter (10 ) is proposed for conditioning speech signals to increase the signal to noise ratio in a relatively noisy environment, which is intended for input to telephones, radios, and the like.
Abstract: An adaptive speech filter ( 10 ) for conditioning speech signals to increase signal to noise ratio in a relatively noisy environment. The adaptive speech filter ( 10 ) has a preamp circuit ( 12 ), a high pass adaptive filter circuit ( 14 ), an output buffer circuit ( 16 ), a peak detector amplifier/filter circuit ( 18 ), a peak detector circuit ( 20 ) and a voltage regulator circuit ( 22 ), embodied in an application specific integrated circuit ( 24 ). The adaptive speech filter ( 10 ) is intended for input to telephones, radios, and the like.
48 citations
01 Sep 2010
TL;DR: In this paper, a full-wave rectifier based on one CDTA and two Schottky diodes is presented, and the PSpice simulation results are included.
Abstract: Precision rectifiers are important building blocks for analog signal processing. The traditional approach based on diodes and operational amplifiers (OpAmps) exhibits undesirable effects caused by limited OpAmp slew rate and diode commutations. In the paper, a full-wave rectifier based on one CDTA and two Schottky diodes is presented. The PSpice simulation results are included.
48 citations
TL;DR: In this paper, a hybrid driving scheme for full-bridge-type synchronous rectifier (SR) in LLC resonant dc/dc converter is proposed, which combines voltage-driving and current-driving methods to drive the SRs with simple circuit structure.
Abstract: The LLC resonant converter with a full-bridge rectifier can achieve two balanced outputs with a simple balancing capacitor, which is quite attractive for LED driver application. To further improve the efficiency, synchronous rectification is an effective way to reduce the conduction loss of the rectifier. In this paper, a new hybrid driving scheme for full-bridge-type synchronous rectifier (SR) in LLC resonant dc/dc converter is proposed. The proposed hybrid driving scheme combines voltage-driving method and current-driving method to drive the SRs with simple circuit structure. The high-side SRs are driven by one auxiliary winding of the transformer and the low-side SRs are driven by a current transformer with only one secondary winding. Furthermore, the proposed method can be operated in discontinuous conduction mode and continuous conduction mode conditions. The detailed operation principles and design considerations are presented. Finally, the experimental results from a 200-kHz 100-W prototype verify the theoretical analysis.
47 citations
Patent•
26 Jan 1979TL;DR: In this paper, a dual armature winding three-phase alternator has a first or main winding connected to a first rectifier bank to supply power to vehicular loads, for example at 12 V nominal level; an auxiliary winding is connected to the rectifier which can be switched to operate as a half-wave rectifier, in parallel with the main winding and main rectifier to supply the ordinary loads when high-power loads are not connected.
Abstract: To supply intermittently required high-power loads, such as heater applications in an automotive vehicle, a dual armature winding three-phase alternator has a first or main winding connected to a first or main rectifier bank to supply power to vehicular loads, for example at 12 V nominal level; an auxiliary winding is connected to a rectifier which can be switched to operate as a half-wave rectifier, in parallel with the main winding and main rectifier to supply the ordinary loads when high-power loads are not connected; or to be switched in a full-wave bridge rectifier configuration to provide additional power at elevated voltage, added to the voltage of the rectifier receiving current from the main windings, for example providing 16·√3=28 V added to the nominal supply voltage of 12 V=40 V voltage to the heater load.
47 citations
TL;DR: The digitized feedfoward compensation method is proposed for the rectifier to reduce the impact of the switch between DCM and CCM and the theoretical analysis of the proposed method is deduced and the control design strategy is given.
Abstract: This paper presents a front-end three-phase ac/dc power factor correction rectifier, which is based on the three-level bidirectional-switch Vienna topology. On one hand, the rectifier is designed to operate in continuous-conduction mode (CCM) at full power. However, at reduced load, it operates in discontinuous-conduction mode (DCM). On the other hand, with reduced input inductance, the DCM mode occurs even when the rectifier operates at full power. In this paper, the digitized feedfoward compensation method is proposed for the rectifier to reduce the impact of the switch between DCM and CCM. The theoretical analysis of the proposed method is deduced; furthermore, the control design strategy is given. The experimental results are obtained by using a digitally controlled Vienna rectifier, which validated the proposed compensation method.
47 citations