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 & Technology, vol. 7, no. 2.20, Apr. 2018, pp. 339-41, https://doi.org/10.14419/ijet.v7i2.20.16729.