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frequency response and good phase response go together, and if the
frequency response is made level over the band occupied by the pulse
the phase response is likely to be satisfactory too. But the frequency
response should fall off gradually above the upper frequency limit.
A sharp cut-off above this limit will give an unsatisfactory phase
response.
We have now examined the frequency and phase response of a
pulse amplifier. A third important characteristic is the input/output
relationship. For an a.f. amplifier this has to be as linear as we can
make it, and negative feedback is extensively employed to achieve
the required degree of linearity ...