Wasmi Osman Luhaib S, Khalid Khaleel Mohammed D. Design of Delta-Sigma ΣΔ based Fractional N PLL Frequency Synthesizer for GSM Mobile Systems. AREJ [Internet]. 2012 Jun. 28 [cited 2025 Sep. 8];20(3):26-34. Available from: https://jamh.uomosul.edu.iq/index.php/arej/article/view/30576