KMITL

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

Browse

Settings

Access type: UnknownSubject: search.filters.subject.OTA-based circuit

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    A voltage-mode gray-code algorithmic ADC
    (2008-12-01)
    Arayawat, Somjai
    ;
    Thubtong, Uthan
    ;
    Julsereewong, Prasit
    ;
    Riewruja, Vanchai
    ;
    Julsereewong, Amphawan
    This paper presents a design technique of a Gray-code algorithmic analog-to-digital converter (ADC) operating in voltage mode. The realization method is based on the use of commercial available devices. The proposed converter comprises the operational transconductance amplifiers (OTAs), diodes, resistors, and voltage comparator to synthesize the triangular-like DC transfer characteristic and digital output for one-bit cell ADC. An N-bit resolution can be simply implemented by cascading the N proposed one-bit cells. Experimental results verifying the circuit performances are agreed with the theoretical values. © 2008 SICE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Simple VCO with negative voltage-frequency relation
    (2008-12-01)
    Pongswatd, Sawai
    ;
    Julsereewong, Amphawan
    ;
    Tirasesth, Kitti
    ;
    Sasaki, Hirofumi
    ;
    Shi, Yan
    A simple voltage controlled oscillator (VCO) with negative voltage-frequency (V-F) relation is presented in this paper. The realization technique is based on the use of commercial available devices to generate tunable sawtooth and square wave signals. Decreasing the control voltage linearly increases the output oscillation frequency. The proposed VCO consists of operational transconductance amplifiers (OTAs) and an RS Flip Flop. Experimental results showing the circuit performances are agreed with the expected values. The usefulness of the proposed circuit is demonstrated through application example with reducing the output ripple waveforms of a buck converter.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    OTA-based gray-code algorithmic ADC
    (2006-12-01)
    Chaikla, Amphawan
    ;
    Arayawat, Somjai
    ;
    Riewruja, Vanchai
    This paper presents a Gray-code algorithmic analog-to-digital converter (ADC). The proposed circuit comprises of OTAs, diodes, resistors, and voltage comparator to synthesize a triangular-like DC transfer characteristic and a digital output for an one-bit cell ADC. The design structure is simple and flexible. An N-bit resolution can be implemented by cascading the N proposed one-bit cells. Experimental results verifying the circuit performances are agreed with the theoretical values. © 2006 ICASE.