N.AshokKumar, Dr, and Dr A.Kavitha. “An Efficient and Novel Design of Loop Filter, Charge Pump and VCO for PLL Using CMOS Technology”. International Journal of Engineering and Technology, vol. 7, no. 2.20, Apr. 2018, pp. 339-41, https://doi.org/10.14419/ijet.v7i2.20.16729.