| # Bandgap Reference Design |
| |
| A simple bandgap topology is evaluated with a set of simulations and then implemented in open-source EDA tools. |
| Please refer to this git repo for detailed information on design (https://github.com/vsdip/avsdbgp_3v3_sky130_v1). |
| |
| # Bandgap Performance Characteristics |
| |
| | Parameter| Description| Min | Type | Max | Unit | Condition | |
| | :---: | :-: | :-: | :-: | :---: | :-: | :-: | |
| |Technology| 130 nm CMOS Process | |
| |RL|Load resistance at Vbgp terminal | 100|||Mohm|VDD=3.3V, T=27C| |
| |Vbgp|Output Reference voltage|1.197642|1.201057|1.212476|V|T=-40 to 140C, VDD=3.3V| |
| |Vbgp|Output Reference voltage|1.178285|1.201057|1.211677|V|VDD=2.7V to VDD=3.6V, T=27C| |
| |TC_vbgp|Temperature Coefficient of Vbgp||6.8717||ppm/C|T=-40 to 140C, VDD=3.3V| |
| |VC_vbgp|Voltage Coefficient of Vbgp||2.7802||%/V|VDD=2.7V to 3.6, T=27C| |
| |VDD|Supply Voltage|3.2|3.3|3.6|V|T=-40C to 140C| |
| |IDD|Supply Current||3.954||uA|EN=1| |
| |IDD|Supply Current||607.836||nA|EN=0| |
| |
| # |
| |
| Here are some reference links used to learn to design in open source EDA tools and about bandgap reference circuit design. |
| |
| 1. https://github.com/nickson-jose/vsdstdcelldesign |
| |
| 2. https://github.com/praharshapm/vsdmixedsignalflow |
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| 3. https://github.com/sherylcorina/avsdbgp_3v3 |
| |
| 4. https://github.com/an3ol/General-purpose-Bandgap-Reference-avsdbgp_3v3 |
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| 5. https://www.udemy.com/course/vlsi-academy-custom-layout/ |
| |
| # Acknowledgement |
| |
| Kunal Ghosh - Co-founder (VSD Corp. Pvt. Ltd) |
| Tim Edwards - Senior Vice President of Analog and Design at efabless corporation |
| Anmol Purty - VSD Intern |
| Sheryl Serrao - VSD Intern |
