xpassionzxc
New Member
Hello,
I have a configuration drawing for the LM311 that will generate a PWM signal to the MOSFET. This MOSFET is to drive the boost converter.
May I ask what is the use of the R1 ( 1k ohms) to the input of the gate of the MOSFET?
I realized when the dc control signal ( 0 - 1V ) is around 0.8 to 1V , my waveform ( square waveform) before the R1 resistor is very unstable. However, after placing the R1 resistor, the waveform becomes stable.
Anyone know why placing the 1K ohms before the input of the gate MOSFET will make the square waveform stable ?
MOSFET is N channel IRF740.
I have a configuration drawing for the LM311 that will generate a PWM signal to the MOSFET. This MOSFET is to drive the boost converter.
May I ask what is the use of the R1 ( 1k ohms) to the input of the gate of the MOSFET?
I realized when the dc control signal ( 0 - 1V ) is around 0.8 to 1V , my waveform ( square waveform) before the R1 resistor is very unstable. However, after placing the R1 resistor, the waveform becomes stable.
Anyone know why placing the 1K ohms before the input of the gate MOSFET will make the square waveform stable ?
MOSFET is N channel IRF740.
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