Enhanced active-feedback frequency compensation with on-chip-capacitor reduction feature for amplifiers with large capacitive load
| Autor: | Kai Ho Mak, Ka Nang Leung, Jianping Guo, Wang Ling Goh, Ming Wai Lau |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
business.industry Applied Mathematics Amplifier 020208 electrical & electronic engineering Electrical engineering Frequency compensation Slew rate Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology Fully differential amplifier 020202 computer hardware & architecture Computer Science Applications Electronic Optical and Magnetic Materials law.invention law Operational transconductance amplifier Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering Operational amplifier Electronic engineering Electrical and Electronic Engineering Multistage amplifier business Direct-coupled amplifier |
| Zdroj: | International Journal of Circuit Theory and Applications. 45:2119-2133 |
| ISSN: | 0098-9886 |
| DOI: | 10.1002/cta.2326 |
| Popis: | Summary A large capacitive load amplifier with enhanced active-feedback frequency compensation is proposed in this paper. The enhancement is achieved through using a wide-bandwidth scalar circuit to increase the transconductance of the output stage so that the overall bandwidth of the amplifier can be extended considerably. Implemented in a standard CMOS 130-nm technology, with a supply of 0.7 V and consuming 27 μA of current, the amplifier drives a load capacitor of 15 nF. No on-chip resistor is needed; only a 0.91-pF compensation capacitor is used to maintain stability. The achieved gain-bandwidth product and phase margin are 1.28 MHz and 66.9°, respectively. Moreover, the slew rate is 0.263 V/μs. The active chip area is 0.0056 mm2. Copyright © 2017 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text