AshokKumar, N, and 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. 3.1, Aug. 2018, pp. 39-41, https://doi.org/10.14419/ijet.v7i3.1.16793.