Hello,
I planned to design a single phase bridge inverter with 4 mosfets.
Pulse sequence will be a PWM obtained by comparing a sine wave with a triangular.
1. I took an LM324 and the pins 4 & 11 connected to the supply (12v).
2. Pins 12 & 13 connected to sine and triangular signals from two different generators.
3. The pin 14 is connected to an oscilloscope with respect to the supply ground.
Here goes my problem.
I have checked the signal shape in oscilloscope before connecting to 324. The signals are pretty good. But when the two signals (sine and tri) connected to the opamp, the inputs are displaying only half wave and the output is not a PWM.
I have made some trials with some resistors too to avoid floating terminals. Are there any special things to follow for getting this?
I planned to design a single phase bridge inverter with 4 mosfets.
Pulse sequence will be a PWM obtained by comparing a sine wave with a triangular.
1. I took an LM324 and the pins 4 & 11 connected to the supply (12v).
2. Pins 12 & 13 connected to sine and triangular signals from two different generators.
3. The pin 14 is connected to an oscilloscope with respect to the supply ground.
Here goes my problem.
I have checked the signal shape in oscilloscope before connecting to 324. The signals are pretty good. But when the two signals (sine and tri) connected to the opamp, the inputs are displaying only half wave and the output is not a PWM.
I have made some trials with some resistors too to avoid floating terminals. Are there any special things to follow for getting this?