High Current Matching over Full-Swing and Low-Glitch Charge Pump Circuit for PLLs

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Date
2013-04
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Mark
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Společnost pro radioelektronické inženýrství
Abstract
A high current matching over full-swing and low-glitch charge pump (CP) circuit is proposed. The current of the CP is split into two identical branches having one-half the original current. The two branches are connected in source-coupled structure, and a two-stage amplifier is used to regulate the common-source voltage for the minimum current mismatch. The proposed CP is designed in TSMC 0.18µm CMOS technology with a power supply of 1.8 V. SpectreRF based simulation results show the mismatch between the current source and the current sink is less than 0.1% while the current is 40 µA and output swing is 1.32 V ranging from 0.2 V to 1.52 V. Moreover, the transient output current presents nearly no glitches. The simulation results verify the usage of the CP in PLLs with the maximum tuning range from the voltage-controlled oscillator, as well as the low power supply applications.
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Citation
Radioengineering. 2013, vol. 22, č. 1, s. 153-158. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2013/13_01_0153_0158.pdf
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Peer-reviewed
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en
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Creative Commons Attribution 3.0 Unported License
http://creativecommons.org/licenses/by/3.0/
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