June 2006
Intermediate to advanced
528 pages
17h 12m
English
Content preview from Switching Power Supplies A - Z
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Feedback Loop Analysis and Stability
open-loop gain. For example if the open-loop gain at 1 kHz is 20 dB, it attenuatesa1kHz
line disturbance by an additional 20 dB — over and above the attenuation already present
without feedback considered.
Let’s conduct a more detailed analysis. Suppose we are interested in attenuating the 100 Hz
(low-frequency) ripple component of the input voltage in an off-line power supply to a very
small value. If our crossover frequency is 500 kHz, then by using the simple relationship
derived in Figure 7-6, we can find the open-loop gain at 100 Hz (here we are assuming we
carried out the recommended compensation scheme, which ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.