Charge Pump with Improved High-Swing Cascode Current Source for Accurate Current Matching in DPLL

  • D. S. RajeshwariEmail author
  • P. V. Rao
  • V. Rajesh
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 394)


In loop dynamics of charge pump phase-locked loop, the charge pump current plays predominate role to loop bandwidth. Different charge pump architectures suffer from charge sharing, clock feed-through, channel charge injection, and current mismatch. Due to this, charge pump phase-locked loop can have more reference spur. Improved high-swing current source is proposed to obtain nearest current matching characteristics. 0.01 % of current mismatch is achieved with 3.3 V, 90 nm CMOS technology. The circuit is verified at process voltage temperature corners.


Charge Pump Current Mirror Loop Bandwidth Charge Sharing Phase Frequency Detector 
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Copyright information

© Springer India 2016

Authors and Affiliations

  1. 1.Electronics & Communication DepartmentJain University & SiCon Design Technologies Pvt. LtdBengaluruIndia
  2. 2.Electronics & Communication DepartmentRajaRajeshwari College of EngineeringBengaluruIndia
  3. 3.SiCon Design Technologies Pvt. LtdBengaluruIndia

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