Hello,
I have some question regarding H-bridge (MOSFETS). I have attached the circuit the I simulated and you can see it below. Anyway, from my understanding, when S1 is pressed, Q1 and Q4 will act as short line switch (in that case it will be saturated), making the current flow through them and therefore causing the motor to spin (I replaced the motor with the LED because I couldn't find a symbol for it in Multisim), while Q2 and Q3 will be working in the cutoff region. Am I getting this correct?
My second question is, why do we need to add a high value (1M ohms) resistor to each gate? Why not simply ground the gates without the resistors?
Question 3, how can I control the speed of the motor?
Thank you.
I have some question regarding H-bridge (MOSFETS). I have attached the circuit the I simulated and you can see it below. Anyway, from my understanding, when S1 is pressed, Q1 and Q4 will act as short line switch (in that case it will be saturated), making the current flow through them and therefore causing the motor to spin (I replaced the motor with the LED because I couldn't find a symbol for it in Multisim), while Q2 and Q3 will be working in the cutoff region. Am I getting this correct?
My second question is, why do we need to add a high value (1M ohms) resistor to each gate? Why not simply ground the gates without the resistors?
Question 3, how can I control the speed of the motor?
Thank you.
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