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    Item type:Publication, Access status: without files ,
    Low power on-chip load tracking-zero compensation method for low dropout regulator
    (2015-08-06)
    Subbiah, Iyappan
    ;
    Elneel, Nashwa Abo
    ;
    Varga, Gabor
    ;
    Ashok, Arun
    ;
    Schröder, Dietmar
    This paper describes a novel frequency compensation method for a low dropout regulator (LDO). The proposed load tracking-zero compensation circuit not only eliminates the need for a bulky external off-chip capacitor that is typically employed in conventional compensation techniques, but also consumes very low additional quiescent current of 7.5μA that makes this method highly suitable for integrated SoC power management applications. It is demonstrated that this compensation technique, designed for the LDO in 130-nm CMOS technology, improves the stability and enhances the load regulation of the low dropout regulator.
    Publicationtype: Conference Paper
      33
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    Item type:Publication, Access status: without files ,
    A low-noise saturation-stacked bandgap reference for image sensor applications
    (IEEE, 2014)
    Subbiah, Iyappan
    ;
    Süss, Andreas
    ;
    Kravchenko, Andrey
    ;
    Hosticka, Bedrich
    ;
    Krautschneider, Wolfgang
    A novel architecture for a bandgap voltage reference is presented in this paper. The voltage reference, designed for image sensor applications, is primarily targeted for a low-noise operation along with other practical constraints such as high power supply rejection, temperature immunity and short start-up time. The analysis and operation of the circuit is discussed and the trade-offs involved in the implementation aspects are examined. The measurement results of the fabricated circuit in a 0.35-μm CMOS process show a noise voltage level of 450 nV/√Hz at 10 Hz, a temperature coefficient of 14 ppm/K and a PSRR of 52 dB.
    Publicationtype: Conference Paper
      23