not_in_asia
New Member
I'm confused about how to make the MOSFET Q1 act as an ideal switch in this buck circuit:
(schematic 1)
I need to have the voltage at N2 equal to the voltage at N1 when the transistor is turned on.
I've tried using a frequency generator in a setup similar to that in schematic 2. At N2 I ended up getting a a pulse more like V2 (voltage of the frequency generator) - Veb. I tried some BJT's and MOSFETS for Q1, different resistor values, different setups like schematic 1, different pulse frequencies, and never really got anywhere.
If I get a pulse from a frequency generator or microntroller- for experimental purposes- then how do I set up the pulse at the base/ gate to make the transistor work as an ideal switch?
(schematic 2)
(schematic 1)
I need to have the voltage at N2 equal to the voltage at N1 when the transistor is turned on.
I've tried using a frequency generator in a setup similar to that in schematic 2. At N2 I ended up getting a a pulse more like V2 (voltage of the frequency generator) - Veb. I tried some BJT's and MOSFETS for Q1, different resistor values, different setups like schematic 1, different pulse frequencies, and never really got anywhere.
If I get a pulse from a frequency generator or microntroller- for experimental purposes- then how do I set up the pulse at the base/ gate to make the transistor work as an ideal switch?
(schematic 2)
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