Transient Response and Risetime

Transient response and frequency response are directly related the broader the bandwidth of an amplifier (at the high-frequency end), the more rapid is its transient response. Proof of this statement lies in the realm of Fourier analysis and is omitted here (see Ferris, 1962, for example). If we wish an amplifier to pass sharp pulses with high fidelity, then we must select an amplifier with wide bandwidth. 

If the frequency response of the amplifier is not equal to the BW of the frequency spectrum of the pulse, then wave form distortion will occur. 

Alternating-Current, Direct-Current, and Chopper-Stabilized Preamplifiers 

The input preamplifier which is connected to a pair of electrodes used for direct physiological recording has been called traditionally a headstage. This terminology now appears on the wane. We have two choices of a basic amplifier system depending upon the type of signal that is to be processed. 

Output from properly designed amplifier for this signal. 

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