December 2017
Intermediate to advanced
926 pages
22h 26m
English
5.6.3 Optimization of a two-pole amplifier for fast settling response
Amplifiers used in high-speed applications should preferably be designed to achieve the minimum settling time [45,46]. In general, the settling time, ts, is defined as the time required for the amplifier output voltage to settle to within an error tolerance, ∈, around the final steady-state value.
Consider a two-stage amplifier characterized by an open-loop transfer function of the form
(5.431) |
where A0 is the dc gain, and ωp1 and ωp2 are the frequency locations of the first and second poles (p1 and p2), respectively. In a unity-gain configuration, the closed-loop transfer function is
FIGURE 5.63Step responses of a two-stage amplifier.
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