MsStateDawg
New Member
I have been working on a full-bridge inverter in Pspice for quite some time now. My goal is to use PWM at 18 kHz. I have used two 741 op-amps as comparitors to compare a 60 Hz sine wave with a 18 kHz sawtooth wave. The result, when filtered correctly, should give a 60 Hz output.
Here is a link to the circuit setup and the waveform I am getting:
**broken link removed**
**broken link removed**
The problem is that the output will only increase to 20 volts (peak-to-peak). I realize the schematic only has 10 volts as the source. However, the problem occurs with any voltage greater than 10 volts. I'm almost positive that the two upper bransistors have to be connected from gate to source. Does anyone know how this can be done using the op-amps? Is there any other possible way?
I also have PSPICE schematic located at the following link:
**broken link removed**
I greatly appreciate any help.
Here is a link to the circuit setup and the waveform I am getting:
**broken link removed**
**broken link removed**
The problem is that the output will only increase to 20 volts (peak-to-peak). I realize the schematic only has 10 volts as the source. However, the problem occurs with any voltage greater than 10 volts. I'm almost positive that the two upper bransistors have to be connected from gate to source. Does anyone know how this can be done using the op-amps? Is there any other possible way?
I also have PSPICE schematic located at the following link:
**broken link removed**
I greatly appreciate any help.