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Title A Compact Wide-swing Self-biased Cascode Current Mirror for Wide Dynamic-range Applications
Authors (Seongil Yeo) ; (Jaejin Kim) ; (Gunmo Koo) ; (Kunhee Cho)
DOI https://doi.org/10.5573/JSTS.2025.25.1.66
Page pp.66-70
ISSN 1598-1657
Keywords Cascode current mirror; low-voltage; self-biased; wide-swing; wide dynamic-range
Abstract The cascode current mirror is the most widely used block in analog circuit design, and wide voltage swing operation is essential for low-supply voltage applications. In wide dynamic-range applications, such as current sensing in DC-DC converters, the current mirror must maintain high accuracy across a wide range of reference currents while enabling wide voltage swing operation at the maximum reference current. In this paper, a wideswing self-biased cascode current mirror for wide dynamic-range applications is described. Unlike conventional structures, the proposed design is biased by a non-isolated active device without using an extra current path or an isolated active device. The proposed current mirror demonstrates higher accuracy for a wide-range of reference currents compared to prior wide-swing cascode current mirror designs and offers a more compact design.