A high-speed, high-gain OTA structure with a new compensation technique
| Autor: | Armin Jalili, Rasoul Dehghani, Mohammad Najjarzadegan |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Signal processing
Engineering Open-loop gain business.industry Phase margin Hardware_PERFORMANCEANDRELIABILITY law.invention Capacitor CMOS Control theory Booster (electric power) law Operational transconductance amplifier Hardware_INTEGRATEDCIRCUITS Electronic engineering business Gain–bandwidth product |
| Zdroj: | 2015 23rd Iranian Conference on Electrical Engineering. |
| DOI: | 10.1109/iraniancee.2015.7146423 |
| Popis: | In this paper a high-speed, high-gain operational transconductance amplifier (OTA) is designed and simulated in a 180-nm CMOS technology. The gain-boosting technique is employed in a two-stage OTA structure and a new compensation approach is developed. Using booster in the two stage OTA increases the open-loop DC gain while using the proposed compensation technique guarantees the stability of the structure. Moreover, using the simplifications made in the small signal analysis in this work provides an effective strategy in analyzing more complex circuit structures. In this case, an OTA with an open-loop DC gain of about 114 dB, unity gain bandwidth of about 305 MHz, phase margin of 61° and power consumption of 4.3 mW with a loading capacitor of 5 pF is designed and simulated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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