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A 2.3nA-to-205nA Clock-Tunable Dynamic Current Reference with a Built-in 2nd-Order Current-Mode Low-Pass Filter and Coarse-Fine Regulation
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A4 Artikkeli konferenssijulkaisussa
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en
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5
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2025 23rd IEEE Interregional NEWCAS Conference, NEWCAS 2025, pp. 336-340
Abstract
This paper presents a frequency-controlled nanoampere current reference (IREF ) circuit capable of generating reconfigurable output currents, ranging from 2.3 nA to 205 nA by varying the clock frequency from 110 kHz to 10 MHz. Simulated in the Cadence generic 45nm (gpdk045) CMOS process, the dynamic IREF achieves a temperature coefficient (TC) of 47.2 ppm / °C over -40°C to 125° C under nominal conditions without requiring any trimming. It shows a line sensitivity (LS) of 1.23 % / V with a minimum supply voltage of 1.1V, and maintains stable operation with current ripples under 0.2 %_pp, achieved through a 2nd -order current-mode low pass filter (LPF). The wide current range combined with low ripple performance makes the design particularly suitable for low-power applications. Additionally, the design parameters of the dynamic IREF are fully disclosed to facilitate replication and support further research.
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Publisher Copyright: © 2025 IEEE.
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Jiang, K, Ji, Y, Kosunen, M & Kim, K 2025, A 2.3nA-to-205nA Clock-Tunable Dynamic Current Reference with a Built-in 2nd-Order Current-Mode Low-Pass Filter and Coarse-Fine Regulation. in 2025 23rd IEEE Interregional NEWCAS Conference, NEWCAS 2025. IEEE, pp. 336-340, IEEE International New Circuits and Systems Conference, Paris, France, 22/06/2025. https://doi.org/10.1109/NewCAS64648.2025.11107089