Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads
An improved frequency compensation technique is presented in this paper. It is based on a cascade of a voltage amplifier and a transconductor to form a composite gain-enhanced feedforward stage in a two-stage amplifier so as to broaden the gain bandwidth via low-frequency pole–zero cancellation at h...
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sg-ntu-dr.10356-912992020-03-07T14:02:38Z Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads Chan, Pak Kwong Chen, Y. C. School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering An improved frequency compensation technique is presented in this paper. It is based on a cascade of a voltage amplifier and a transconductor to form a composite gain-enhanced feedforward stage in a two-stage amplifier so as to broaden the gain bandwidth via low-frequency pole–zero cancellation at heavy capacitive loads, but yet without increasing substantial power consumption. The technique has been confirmed by the experimental results. An operational amplifier has been designed to drive a capacitive load of 300 pF. The amplifier exhibits a dc gain of 87 dB, a gain bandwidth of 10.4 MHz at 63.7° phase margin, an average slew rate of 3.5V/µs, a compensation capacitor of only 6 pF while consuming 2.45 mW at a 3-V supply in a standard 0.6- µm CMOS technology. Published version 2009-07-03T06:29:48Z 2019-12-06T18:03:12Z 2009-07-03T06:29:48Z 2019-12-06T18:03:12Z 2003 2003 Journal Article Chan, P. K., & Chen, Y. C. (2003). Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads. IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, 50(12), 933-941. 1057-7130 https://hdl.handle.net/10356/91299 http://hdl.handle.net/10220/4680 10.1109/TCSII.2003.820258 en IEEE transactions on circuits and systems-II : analog and digital signal processing © 2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site. 9 p. application/pdf |
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DRNTU::Engineering::Electrical and electronic engineering Chan, Pak Kwong Chen, Y. C. Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| description |
An improved frequency compensation technique is presented in this paper. It is based on a cascade of a voltage amplifier and a transconductor to form a composite gain-enhanced feedforward stage in a two-stage amplifier so as to broaden the gain bandwidth via low-frequency pole–zero cancellation at heavy capacitive loads, but yet without increasing substantial power consumption. The technique has been confirmed by the experimental results. An operational amplifier has been designed to drive a capacitive load of 300 pF. The amplifier exhibits a dc gain of 87 dB, a gain bandwidth of 10.4 MHz at 63.7° phase margin, an average slew rate of 3.5V/µs, a compensation capacitor of only 6 pF while consuming 2.45 mW at a 3-V supply in a standard 0.6- µm CMOS
technology. |
| author2 |
School of Electrical and Electronic Engineering |
| author_facet |
School of Electrical and Electronic Engineering Chan, Pak Kwong Chen, Y. C. |
| format |
Article |
| author |
Chan, Pak Kwong Chen, Y. C. |
| author_sort |
Chan, Pak Kwong |
| title |
Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| title_short |
Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| title_full |
Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| title_fullStr |
Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| title_full_unstemmed |
Gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| title_sort |
gain-enhanced feedforward path compensation technique for pole–zero cancellation at heavy capacitive loads |
| publishDate |
2009 |
| url |
https://hdl.handle.net/10356/91299 http://hdl.handle.net/10220/4680 |
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1681041372238315520 |