Miller compensation using current buffers in fully differential CMOS two-stage operational amplifiers
Several Miller compensation schemes using a current buffer in series with the compensation capacitor to modify the right-half-plane zero in fully differential two-stage CMOS operational amplifiers are analyzed. One scheme uses a current mirror as a current buffer, while the rest use a common-gate tr...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. 1, Fundamental theory and applications Fundamental theory and applications, 2004-02, Vol.51 (2), p.275-285 |
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| container_end_page | 285 |
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| container_issue | 2 |
| container_start_page | 275 |
| container_title | IEEE transactions on circuits and systems. 1, Fundamental theory and applications |
| container_volume | 51 |
| creator | Hurst, P.J. Lewis, S.H. Keane, J.P. Aram, F. Dyer, K.C. |
| description | Several Miller compensation schemes using a current buffer in series with the compensation capacitor to modify the right-half-plane zero in fully differential two-stage CMOS operational amplifiers are analyzed. One scheme uses a current mirror as a current buffer, while the rest use a common-gate transistor as a current buffer. The gain transfer functions are derived for each topology, and approximate transfer-function coefficients are found that allow accurate estimation of the zero(s) and poles. |
| doi_str_mv | 10.1109/TCSI.2003.820254 |
| format | Article |
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| identifier | ISSN: 1549-8328 |
| ispartof | IEEE transactions on circuits and systems. 1, Fundamental theory and applications, 2004-02, Vol.51 (2), p.275-285 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Approximation Buffers Capacitors Circuits CMOS Compensation Current mirrors Differential amplifiers Frequency Gain Impedance Mirrors Operational amplifiers Poles and zeros Transfer functions Voltage |
| title | Miller compensation using current buffers in fully differential CMOS two-stage operational amplifiers |
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