263 MOS Bandgap
263 : MOS Bandgap
- Author: Matt Venn
- Description: bandgap using only MOSFETs
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
Read the paper here and see the DTMOS variant below.
Circuit
DTMOS variant connects the lower PMOS body to VSS instead of VDD.
Simulation
MOS
- Simulated output is 0.714 to 0.716v across 10 to 120 degrees C.
- Simulated output is 0.6 to 0.8v across 1.6 to 2v VDD.
DTMOS
- Simulated output is 0.515 to 0.510v across 10 to 120 degrees C.
- Simulated output is 0.3 to 0.6v across 1.6 to 2v VDD.
How to test
MOS
Connect a multimeter to analog output 0. It should measure around 0.7v and remain constant with temperature.
DTMOS
Connect a multimeter to analog output 0. It should measure around 0.5v and remain constant with temperature.
External hardware
Multimeter, hot air gun to heat the chip
References
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | |||
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | B3 | 9 | bandgap |
| 1 | B2 | 8 | bandgap_dtmos |