A 3.0 μ Vrms, 2.4 ppm/°C BGR With Feedback Coefficient Enhancement and Bowl-Shaped Curvature Compensation
- Resource Type
- Periodical
- Authors
- Liao, X.; Zhang, Y.; Zhang, S.; Liu, L.
- Source
- IEEE Transactions on Circuits and Systems I: Regular Papers IEEE Trans. Circuits Syst. I Circuits and Systems I: Regular Papers, IEEE Transactions on. 71(5):2424-2433 May, 2024
- Subject
- Components, Circuits, Devices and Systems
Voltage
Resistors
Monitoring
Photonic band gap
Temperature distribution
Integrated circuit modeling
Switches
Bandgap reference
low noise
low offset voltage
curvature compensation
- Language
- ISSN
- 1549-8328
1558-0806
This paper demonstrates a low-noise, offset and temperature coefficient (TC) bandgap reference for the portable biopotential signal monitoring system. The proposed feedback coefficient enhancement technique suppresses the low-frequency noise and offset voltage. Besides, the bowl-shaped curvature compensation is applied in the BGR to obtain a decent TC. The proposed bandgap reference was designed and fabricated by the $0.18 ~\mu \text{m}$ deep N-well CMOS technology with an active area of 0.088 mm2. Experimental results show that this BGR outputs 0.6 V reference voltage under 1.2 V supply voltage while consuming $60 ~\mu \text{W}$ power. The measured integrated noise from 0.1 to 10 Hz is about $3.0 ~\mu \text{V}$ (rms). In addition, the average TC of the BGR is 2.4 ppm /°C from −45 °C to 125 °C after trimming.