Wenxin Yu, Lenian He, Jianxiong Xi, Quan Sun, Changyou Men
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A 2.2ppm/°C compensated bandgap voltage reference with a double-ended current trimming technique
This paper presents a high-precision bandgap voltage reference (BGR) with a double-ended current trimming technique. A high-order curvature compensation method is adopted to compensate for the nonlinearity of V BE . The proposed trimming technique using the one-time programmable (OTP) programming cancels the errors caused by process variation and enables bulk production, which achieves a best TC of 2.2 ppm/℃ from -40 ℃ to 125 ℃. The proposed BGR is fabricated in a 0.18-um BCD process with an active area of 0.329 mm 2 . The line sensitivity is 0.18 %/V operating from 2.9 V to 3.6 V.
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