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Title: | Low-voltage CMOS current feedback amplifier |
Authors: | Pisani, Victoria Grech, Ivan Casha, Owen Gatt, Edward |
Keywords: | Analog CMOS integrated circuits Integrated circuits -- Design and construction Feedback amplifiers Transistors |
Issue Date: | 2013 |
Publisher: | Institute of Electrical and Electronics Engineers Inc. |
Citation: | Pisani, V., Grech, I., Casha, O., & Gatt, E. (2013). Low-voltage CMOS current feedback amplifier. 19th IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2012), Seville. 5-8. |
Abstract: | The paper presents the design of a novel low-voltage CMOS Current-Feedback Operational Amplifier (CFA). The circuit has been designed using a standard 0.35 μm CMOS process and is capable of operating at a supply voltage of 1.8 V with an input common mode range of 0.3 to 1.6 V. The proposed circuit is based on a modified CCII+ model and incorporates a constant-gm complementary input stage in order to achieve high linearity across a wide range of input voltages. Furthermore, this feature enables the CFA input stage to maintain an almost constant inverting input impedance of 32 Ω and an open loop voltage gain of 75 dB. Circuit simulations indicate that the proposed CFA can achieve a gain-bandwidth (GBW) of 470 MHz and a slew rate of 387 V/μs, with a phase margin of at least 70° when simulated at a nominal closed loop gain of 10 and under open circuit output condition. The corresponding GBW and slew rate values for 2 pF capacitive load are 418 MHz and 386 V/μs respectively. |
URI: | https://www.um.edu.mt/library/oar//handle/123456789/17780 |
Appears in Collections: | Scholarly Works - FacICTMN |
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File | Description | Size | Format | |
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Low-voltage CMOS Current Feedback Amplifier.pdf Restricted Access | Low-voltage CMOS current feedback amplifier | 780.76 kB | Adobe PDF | View/Open Request a copy |
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