Open AccessAnalyzing the Impact of Loop Parameter Variations on the Transient Response of Second Order Voltage-Switched CP-PLL
Author(s) -
Ehsan Ali,
D. Narwani,
Ahsin Murtaza Bughio,
Nasreen Nizamani,
Shahid Hussain Siyal,
Abdul Rafay Khatri
Publication year - 2021
Publication title -
engineering, technology and applied science research/engineering, technology and applied science research
Language(s) - English
Resource type - Journals
eISSN - 2241-4487
pISSN - 1792-8036
DOI - 10.48084/etasr.3969
Subject(s) - phase locked loop , control theory (sociology) , pll multibit , loop (graph theory) , transient (computer programming) , charge pump , transient response , voltage , loop gain , bandwidth (computing) , physics , computer science , engineering , phase (matter) , mathematics , telecommunications , quantum mechanics , combinatorics , artificial intelligence , electrical engineering , capacitor , operating system , control (management)
The analysis of the behavior of Charge Pump Phase-Locked Loop (CP-PLL) is a challenging task due to its mixed-signal architecture. Out of its two types, i.e. Current Switched CP-PLL (CSCP-PLL) and Voltage Switched CP-PLL (VSCP-PLL), the prior produces symmetrical pump currents, resulting in an appropriate transient performance to be analyzed. The loop parameters are important to set the gain, target frequency, and assure the stability of the system. The more important is the bandwidth of the loop, which is dependent on the loop filter parameters to perform stable operation and locking time. In this paper, the impact of loop parameter variations on the overall transient behavior of the system is investigated. It has been shown that loop parameters play an important role to ease the design of mixed-signal PLLs.