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Author: search.filters.author.Dejhan, KobchaiSubject: search.filters.subject.Current conveyor

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    High frequency and high precision CMOS half-wave rectifier
    (2010-10-01)
    Kumngern, Montree
    ;
    Knobnob, Boonying
    ;
    Dejhan, Kobchai
    In this paper, a new high frequency and high precision half-wave rectifier circuit which is very suitable for CMOS technology implementation is presented. The system comprises a voltage to current converter, a dual output precision current-mode half-wave rectifier, and two current to voltage converters. An input voltage signal is converted into a current signal by using a current conveyor and a MOS resistor. The current signal is rectified using a dual output class-AB precision rectifier cell and then converted into two output voltages by using grounded MOS resistors. This class-AB current-mode precision rectifier is employed for providing high frequency performance. Simulated rectifier results based-on a 0.5 μm CMOS technology with ±1.2 V supply voltage demonstrates very high operating frequency, very precise rectification and good temperature stability. © Springer Science+Business Media, LLC 2010. © Springer Science+Business Media, LLC 2010.
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    Current conveyor-based versatile precision rectifier
    (2008-12-01)
    Kumngern, Montree
    ;
    Dejhan, Kobchai
    A versatile precision rectifier based on a current conveyor and current mirrors is presented. The proposed circuit performs positive half-wave, negative half-wave, positive full-wave, and negative full-wave rectification into a single circuit. The current-mode technique has been employed to provide the high-precision capability of the circuit. The circuit configuration is very suitable for integrated circuit implementation both in bipolar and CMOS technologies and it exhibits a precise rectifier and good temperature stability. Simulation results using the PSPICE program based on 0.5 μm CMOS parameter through MIETEC demonstrate the performance of the proposed rectifier. Experimental results are provided to confirm the theory.