A Resistor-Less nW-Level Bandgap Reference With Fine-Grained Voltage and Temperature Coefficient Trims
- Resource Type
- Periodical
- Authors
- Bass, O.; Feldman, A.; Shor, J.
- Source
- IEEE Open Journal of Circuits and Systems IEEE Open J. Circuits Syst. Circuits and Systems, IEEE Open Journal of. 3:192-198 2022
- Subject
- Components, Circuits, Devices and Systems
Capacitors
Switches
Resistors
Impedance
Photonic band gap
Frequency measurement
Temperature measurement
Bandgap reference
switched capacitor circuits
low power analog
- Language
- ISSN
- 2644-1225
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.