## Abstract

This paper presents a curvature-compensated sub-1V voltage reference (VR) and a shared-resistive nanoampere current reference (CR) in a 130 nm CMOS process. The CR is used to generate a bipolar junction transistor complementary-to-absolute-temperature voltage, which is summed up with a proportional-to-absolute-temperature voltage generated using a summing network of PMOS gate-coupled pairs. The measured output voltage and current references from 10 chips (<inline-formula> <tex-math notation="LaTeX">$V_{\mathrm{REF}}$</tex-math> </inline-formula> and <inline-formula> <tex-math notation="LaTeX">$I_{\mathrm{REF}}$</tex-math> </inline-formula>) at room temperature are 469 mV and 1.86 nA, respectively. The measured average temperature coefficient of <inline-formula> <tex-math notation="LaTeX">$V_{\mathrm{REF}}$</tex-math> </inline-formula> and <inline-formula> <tex-math notation="LaTeX">$I_{\mathrm{REF}}$</tex-math> </inline-formula> are 29 ppm<inline-formula> <tex-math notation="LaTeX">$/^\circ$</tex-math> </inline-formula>C and 822 ppm<inline-formula> <tex-math notation="LaTeX">$/^\circ$</tex-math> </inline-formula>C over a temperature range from <inline-formula> <tex-math notation="LaTeX">$-$</tex-math> </inline-formula>40<inline-formula> <tex-math notation="LaTeX">$^\circ$</tex-math> </inline-formula>C to 120<inline-formula> <tex-math notation="LaTeX">$^\circ$</tex-math> </inline-formula>C. The minimum supply voltage of the voltage-current reference is 0.95 V, and the total power consumption is 30 nW.

Original language | English |
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Pages (from-to) | 1-13 |

Number of pages | 13 |

Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |

DOIs | |

Publication status | E-pub ahead of print - 2022 |

## Keywords

- current reference
- curvature compensation
- high-precision
- Manganese
- Resistors
- sub-1V
- sub-threshold CMOS design
- temperature compensation
- Temperature dependence
- Temperature measurement
- Threshold voltage
- Transistors
- ultra-low-power
- Video recording
- Voltage reference
- voltage-current reference

## ASJC Scopus subject areas

- Hardware and Architecture
- Electrical and Electronic Engineering

## Fields of Expertise

- Information, Communication & Computing