Fast-Settling Amplifier Design Using Feedforward Compensation Technique
نویسندگان
چکیده
A new feedforward compensation amplifier architecture that provides very fast settling performance is introduced. The additional feedforward path introduces zeros in the open-loop transfer function which can be used to shape the overall frequency response. It is shown that a second-order bandpass feedforward path is useful for extending the unitygain-frequency of the overall amplifier. By choosing the proper gain, center frequency, and Q factor of the bandpass filter, the pole and zeros of the amplifier can be placed on top of each other thus eliminating the slow-settling component inherent in many feedforward compensation schemes. Simulation results of closed-loop amplifiers showing substantial improvements in rise time and settling behavior are presented.
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