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Switching_preregulated_linear_regulator_low_noise

2017-03-19 23:40  
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Switching_preregulated_linear_regulator_low_noise
This circuit is similar to that of Fig. 8-4, except that the low-dropout series regulator at switching-regulator output serves to eliminate switching-induced noise. The circuit also operates from a 9-V battery and will supply 25-mA of noise-free, regulated power with short-circuit current set by the FET 30-mA IDSS.