Name
Abstract | ||
|---|---|---|
This paper presents a new family of innovative operational transconductance amplifier (OTA) topologies based on CMOS inverter structures, with improved gain and energy-efficiency. This new family of OTA designs is suitable for biomedical and healthcare circuits and systems, due to the high energy-efficiency, improved gain and low level of noise contribution, when compared to the state-of-the-art in this field. In this paper, two fully-differential implementations are presented, a first one with a double CMOS branch biased by two pairs of voltage-combiners structures in both NMOS and PMOS configurations, and a second one with folded voltage-combiners specifically targeting low voltage applications, e.g., supplies below 1 V. The usage of voltage-combiners to bias the OTAs improves the gain and the gain-bandwidth product, therefore improving the energy-efficiency figure-of-merit. High values of figure-of-merit are achieved in both implementations, i.e., more than 1600 MHz × pF/mA and 2000 MHz × pF/mA, gain values above 53 dB and 50 dB under supply sources of 2 V and 0.7 V respectively. The folded voltage-combiners biased OTA is able to operate correctly under a voltage supply down to 0.7 V with proper DC biasing. The results are finally compared with state-of-the-art in this field and the potential of the circuits is fulfilled using a state-of-the-art layout-aware integrated-circuit optimization framework, AIDA, particularly relevant in order to overcome the device stacking problematic for lower voltages. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.1016/j.vlsi.2019.12.004 | Integration |
Keywords | Field | DocType |
CMOS,Inverter-based,Low-power,Low-noise,Low-voltage,Energy-efficiency,OTA,Amplifiers,Telescopic,Folded,Voltage-combiners,Biomedical,Healthcare | Inverter,NMOS logic,Computer science,Voltage,Operational transconductance amplifier,Electronic engineering,CMOS,Low voltage,PMOS logic,Biasing | Journal |
Volume | ISSN | Citations |
71 | 0167-9260 | 0 |
PageRank | References | Authors |
0.34 | 0 | 6 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ricardo Povoa | 1 | 53 | 10.57 |
| António Canelas | 2 | 72 | 11.20 |
| Ricardo Martins | 3 | 179 | 20.81 |
| Nuno Cavaco Horta | 4 | 310 | 49.65 |
| Nuno C. Lourenço | 5 | 122 | 18.24 |
| João Goes | 6 | 88 | 27.95 |