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| opamp with the capacitive feedback | ||
| Author zunwang Views 3 Posted at 2008/8/27 00:15 [View In Forum] | ||
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hi, assume a opamp with the capactive feedbackjpctnuise jpctnuise if the input cap is C1, and the feedback cap C2.jpctnuise jpctnuise We know that the gain is -C1/C2, if the open-loop gain is sufficient large.jpctnuise jpctnuise what the problem I may encounter if the feedback cap is very small (ex:50fF or 20fF), with input cap=20pF. Under the same capacitance load condition and open-loop gain=80dB.jpctnuise jpctnuise jpctnuise jpctnuise thanks |
| Reply No. | Replier | Total Replies 1 [View All Replies] [New Reply] | Replied at |
| 1 | bubulu | the noise and leakage associated with the capacitors would have very high influence on the output... | 2008/8/27 00:16 |
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