Abstract
This paper presents the design of a low-noise capacitively-coupled instrumentation amplifier with a sub-1V power supply, which is suitable for low-power sensor data acquisition systems. This amplifier is part of an Analog Front-end (AFE) which is implemented in a standard 130nm bulk CMOS technology. Beside the high-impedance input amplifier, the AFE includes a programmable switch-capacitor bandpass filter and a sigma-delta modulator. A chopper modulation technique is implemented to further reduce the flicker noise, with a positive feedback network to compensate the resulting low input impedance. The preliminary post-layout simulated results of the instrumentation amplifier achieves a total power consumption of 2.6µW, with an open loop gain of 87dB and a GBW of 584kHz and with the input reffered noise of 4.6µVrms and a NEF value of 4. The maximum CMRR of the amplifier is 101dB and the PSRR minus is greater than 66dB. For a sub 1V power supply, the input frequency range is up to 10 kHz.
| Original language | English |
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| Title of host publication | Proceedings - 2021 International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2021 |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Pages | 1-6 |
| Number of pages | 6 |
| ISBN (Electronic) | 9781665412643 |
| DOIs | |
| Publication status | Published - 2021 |
| Event | 5th International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2021 - Caparica and Online, Portugal Duration: 9 Jul 2021 → 9 Jul 2021 |
Conference
| Conference | 5th International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2021 |
|---|---|
| Country/Territory | Portugal |
| City | Caparica and Online |
| Period | 9/07/21 → 9/07/21 |
Keywords
- Analog front-end
- CCIA
- CMOS
- MEMS