A Resistor-Less nW-Level Bandgap Reference With Fine-Grained Voltage and Temperature Coefficient Trims

Ori Bass; Asaf Feldman; Joseph Shor

doi:10.1109/ojcas.2022.3206326

A Resistor-Less nW-Level Bandgap Reference With Fine-Grained Voltage and Temperature Coefficient Trims

Ori Bass, Asaf Feldman, Joseph Shor

Bar-Ilan University - The Alexander Kofkin Faculty of Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A nW-level BJT-based bandgap reference with fine grained voltage and temperature coefficient trimming is presented. The bandgap reference utilizes switched capacitors (SC) as impedance elements instead of resistors in a current mode configuration. This configuration enabled low power (38nW) with a minimal area (0.0174 mm2). The voltage could be trimmed independently without affecting the temperature coefficient. The SC’s are stacked in order to achieve accurate trimming without using unrealistically small capacitors. The temperature coefficient can be trimmed between 50-200 ppm/°C in either direction, while the voltage can be trimmed between 580-800mV.

Original language	American English
Article number	9888150
Pages (from-to)	192-198
Number of pages	7
Journal	IEEE Open Journal of Circuits and Systems
Volume	3
DOIs	https://doi.org/10.1109/ojcas.2022.3206326
State	Published - 1 Jan 2022

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Keywords

Capacitors
Switches
Resistors
Impedance
Photonic band gap
Frequency measurement
Temperature measurement
Bandgap reference
low power analog
switched capacitor circuits

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10.1109/ojcas.2022.3206326

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9888150

Cite this

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abstract = "A nW-level BJT-based bandgap reference with fine grained voltage and temperature coefficient trimming is presented. The bandgap reference utilizes switched capacitors (SC) as impedance elements instead of resistors in a current mode configuration. This configuration enabled low power (38nW) with a minimal area (0.0174 mm2). The voltage could be trimmed independently without affecting the temperature coefficient. The SC{\textquoteright}s are stacked in order to achieve accurate trimming without using unrealistically small capacitors. The temperature coefficient can be trimmed between 50-200 ppm/°C in either direction, while the voltage can be trimmed between 580-800mV.",

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KW - Impedance

KW - Photonic band gap

KW - Frequency measurement

KW - Temperature measurement

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A Resistor-Less nW-Level Bandgap Reference With Fine-Grained Voltage and Temperature Coefficient Trims

Abstract

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Keywords

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