This paper presents a low-pass filter circuit configuration with changeable time constants for a phase locked loop (PLL) frequency synthesizer in multiprogrammable divider (PD) method. The low-pass filter employs operational transconductance amplifiers (OTAs) and grounded capacitor as the basic building units. The time constants can be electronically changed through adjusting the bias currents of OTAs. The PLL frequency synthesizer with the proposed filter has higher speed lock-up time and quality than the conventional one.


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    Title :

    Electronically tunable low-pass filter in PLL frequency synthesizer


    Contributors:
    Tsukutani, T. (author) / Sumi, Y. (author) / Higashimura, M. (author) / Fukui, Y. (author)


    Publication date :

    2001-01-01


    Size :

    273138 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Electronically Tunable Low-Pass Filter in PLL Frequency Synthesizer [20014550]

    Tsukutani, T. / Sumi, Y. / Higashimura, M. et al. | British Library Conference Proceedings | 2001


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