Temperature-Independent Current Reference with Tunable Temperature Coefficient DAC

Abstract

Modern automobiles increasingly support a variety of advanced features, with autonomous vehicle safety gaining heightened attention. This has created a growing demand for sensor technology that can accurately detect environmental changes. One of the critical challenges in automotive sensor technology is the need for a temperature-compensated reference. This paper focuses on designing a temperature-independent reference current source in this MPW. Conventional reference current sources are highly sensitive to environmental conditions, especially temperature fluctuations, leading to varying output values. Although several temperature-compensated reference current sources have been developed, effectively addressing the residual temperature coefficient resulting from process variations remains a challenge. To tackle this issue, we propose a circuit that compensates for residual temperature coefficients, enabling the creation of a stable, temperature-independent reference current source. This design aims to provide a reliable solution for the automotive sensor technology field, where maintaining accuracy across a range of environmental conditions is essential.