Moulika Devi Vankala, and G.P.S Prasanthi. “Analog and Digital PLL With Single Ended Ring VCO for ‘Full Swing Symmetrical Even Phase Outputs’”. International Journal of Computer Engineering in Research Trends 3, no. 8 (August 31, 2016): 441–446. Accessed June 3, 2026. https://www.ijcert.org/index.php/ijcert/article/view/782.