POSITIVE_INPUT／NEGATIVE_OUTPUT_CHARGE_PUMP

Published:2009/6/25 21:12:00 Author:May | From:SeekIC

A simple means of generating a low-power voltage supply of opposite polarity from the main supply. Self oscillating driver produces pulses at a repetition frequency of 100 kHz.When the VMOS device is off, capacitor C is charged to the positive supply. When the VMOS transistor switches on, C delivers a negative voltage through the series diode to the output. The zener serves as a dissipative regulator.



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