KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Knobnob, BoonyingSubject: search.filters.subject.CMOS

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Electronically tunable high-input impedance voltage-mode universal biquadratic filter based on simple CMOS OTAs
    (2010-10-01)
    Kumngern, Montree
    ;
    Knobnob, Boonying
    ;
    Dejhan, Kobchai
    This paper describes a new electronically tunable three inputs and single output voltage-mode universal biquadratic filter based on simple CMOS operational transconductance amplifiers (OTAs) and grounded capacitors. The proposed configuration provides lowpass, highpass, bandpass, bandstop and allpass voltage responses at a high impedance input terminal, which enable easy cascadability. Additionally, the circuit parameters ωo and Q can be set orthogonally by adjusting the transconductances and grounded capacitors. The filter also offers an independent electronic control of parameters ωo by adjusting the transconductance through the bias current/voltage of the OTA. For realizing all the filter responses, no critical component matching condition is required, and all the incremental parameter sensitivities are low. PSPICE simulation results are performed to confirm the theoretical analysis. © 2009 Elsevier GmbH. All rights reserved.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    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.