Gate voltage generator circuit

Published:2012/8/21 22:01:00 Author:Ecco | Keyword: Gate voltage generator | From:SeekIC

FET is commonly used in low-power instruments. When it works, the gate voltage should be higher than the source voltage 9V, it is inconvenient to use battery-powered low-voltage circuit.Working principle: the circuit is shown in Figure 23-12. This circuit can provide high gate voltage. 555 oscillator drives a voltage multiplier to produce the output voltage which is twice of the input voltage. Generally FET ignores gate current, the output current of circuit is very small, and it can provide gate voltage to the 10 FETs without voltage drop at the same time.



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