Back to Search
Start Over
Ultra-low power OTA based on bias recycling and subthreshold operation with phase margin enhancement
Ultra-low power OTA based on bias recycling and subthreshold operation with phase margin enhancement
- Source :
- Microelectronics Journal. 60:94-101
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- An ultra-low power and wide bandwidth operational transconductance amplifier (OTA) is presented. The proposed OTA employs a folded cascode (FC) structure with an enhanced current recycling technique. It provides the advantages of rail-to-rail input and output swing, while presenting lower power consumption and higher DC gain than conventional FC. It substantially reduces the power consumption by operating all devices under subthreshold region. In addition, it improves the phase margin of the OTA via special property of all-subthreshold operation substantially enhanced recycling effect of RFC OTA that ensures high gain and bandwidth. We implemented the proposed OTA in a 65nm CMOS process technology. The post layout simulation results demonstrate a robust performance exhibiting a DC-gain of 50.7dB, and a unity gain bandwidth of 2.1KHz 27.3MHz for a capacitive load of 0.5pF15nF. It also provides high phase margin (PM) up to 90.5 with extremely low power consumption of 3.9W under a low supply voltage of 0.5V.
- Subjects :
- Engineering
business.industry
Subthreshold conduction
020208 electrical & electronic engineering
Bandwidth (signal processing)
General Engineering
Electrical engineering
Phase margin
020206 networking & telecommunications
Hardware_PERFORMANCEANDRELIABILITY
02 engineering and technology
Power factor
Operational transconductance amplifier
Hardware_INTEGRATEDCIRCUITS
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
Cascode
business
Gain–bandwidth product
Voltage
Subjects
Details
- ISSN :
- 00262692
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Microelectronics Journal
- Accession number :
- edsair.doi...........d859353e137c8db429b5d21b805326c1
- Full Text :
- https://doi.org/10.1016/j.mejo.2016.12.007