Abstract
The operational transconductance amplifier (OTA) is, probably, the most relevant building block in analog circuits. However, its design has become particularly difficult in deep nanoscale CMOS technologies. Consequently, during the past
decade, several inverter-based continuous-time and switchedcapacitor (SC) amplifier circuit solutions have been proposed to overcome the limitations imposed by deep-submicron processes. Inverters scale friendly with the technology downscaling, but their applicability depends on some key performance parameters such as, energy-efficiency, die area, low-frequency (DC) gain, gain-bandwidth product (GBW) and linearity versus outputswing (OS). This paper presents three inverter-based SC amplifiers, namely a single inverter, a three-stage inverter, and a threestage inverter with a multipath. The key performance parameters are simulated and fairly compared. The impact of their linearity on systems, depending on the application, is also discussed.
decade, several inverter-based continuous-time and switchedcapacitor (SC) amplifier circuit solutions have been proposed to overcome the limitations imposed by deep-submicron processes. Inverters scale friendly with the technology downscaling, but their applicability depends on some key performance parameters such as, energy-efficiency, die area, low-frequency (DC) gain, gain-bandwidth product (GBW) and linearity versus outputswing (OS). This paper presents three inverter-based SC amplifiers, namely a single inverter, a three-stage inverter, and a threestage inverter with a multipath. The key performance parameters are simulated and fairly compared. The impact of their linearity on systems, depending on the application, is also discussed.
| Original language | English |
|---|---|
| Title of host publication | 2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS): November 24-26th, 2021 Vila do Conde, Portugal |
| Editors | José Machado da Silva, Vítor Grade Tavares |
| Place of Publication | Piscataway |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Number of pages | 5 |
| ISBN (Electronic) | 978-1-6654-2116-4 |
| ISBN (Print) | 978-1-6654-2117-1 |
| DOIs | |
| Publication status | Published - 2021 |
| Event | 2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS) - Vila do Conde, Portugal Duration: 24 Nov 2021 → 26 Nov 2021 |
Publication series
| Name | 2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS) |
|---|---|
| Publisher | IEEE |
| ISSN (Print) | 2471-6170 |
| ISSN (Electronic) | 2640-5563 |
Conference
| Conference | 2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS) |
|---|---|
| Country/Territory | Portugal |
| City | Vila do Conde |
| Period | 24/11/21 → 26/11/21 |
Keywords
- Inverter-based switched-capacitor circuits
- Linearity
- Operational transconductance amplifiers
