Abstract
Presenting the advantage of simplicity, zero-order curvature-corrected voltage reference circuits exhibit a relatively large value of the temperature coefficient. For bipolar technology, base–emitter voltage and Zener voltage represent the most common approach for designing CTAT voltage references; the difference between two base–emitter voltages being the usual method for implementing PTAT voltage references. The CMOS technology offers the possibility of implementing a CTAT voltage starting from the gate–source voltage or from the threshold voltage, while the PTAT voltage references exploit the difference of two gate–source voltages for subthreshold-operated MOS devices. The area of application for zero-order curvature-corrected voltage reference is related to the basic circuits that not require a very small value of the temperature coefficient, representing, also, the basis from developing first-order and superior-order curvature-corrected voltage references with a much better temperature behavior. Additionally, PTAT voltage references could be used as absolute temperature sensors in the hypothesis of a high linearity of their temperature dependence.
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References
Gray PR and Meyer RG (1993) Analysis and Design of Analog Integrated Circuits, 3rd Edition. Wiley, NY
Annema AJ (1998) Low-power Bandgap References Featuring DTMOSTs. The 24th European Solid-State Circuits Conference 116–119
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© 2009 Springer Science+Business Media, LLC
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Popa, C.R. (2009). Zero-Order Curvature-Corrected Voltage References. In: Superior-Order Curvature-Correction Techniques for Voltage References. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-0416-4_2
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DOI: https://doi.org/10.1007/978-1-4419-0416-4_2
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Online ISBN: 978-1-4419-0416-4
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