Active-device capacitances
- 1 December 1971
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electron Devices
- Vol. 18 (12) , 1166-1168
- https://doi.org/10.1109/T-ED.1971.17350
Abstract
The charge-control capacitance ∂Q/∂V looking into a device port is not in general equal to the intrinsic small-signal capacitance found from the low-frequency admittance ratios up to 7:1 occur in practice. This paper explains why the discrepancy occurs, and derives the condition for the discrepancy to be zero. Finally, it is shown that charge-control theory does correctly predict the gain-bandwidth product of an active device.Keywords
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