R .H. Talwekar and  S. S Limaye,  Design of High Gain, High Bandwidth Op-Amp for Reduction of Mismatch Currents in Charge Pump PLL in 180 nm CMOS Technology.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2010, vol. 48(12). 1812 - 1815
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/2445.