Abstract
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.
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Rajeshwari, D.S., Rao, P.V., Rajesh, V. (2016). Charge Pump with Improved High-Swing Cascode Current Source for Accurate Current Matching in DPLL. In: Dash, S., Bhaskar, M., Panigrahi, B., Das, S. (eds) Artificial Intelligence and Evolutionary Computations in Engineering Systems. Advances in Intelligent Systems and Computing, vol 394. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2656-7_4
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DOI: https://doi.org/10.1007/978-81-322-2656-7_4
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