Sorry for the mass posting tonight but Im stuck on a problem and wondered if anyone on here could help.
Im trying to add a positive and negative offset to a triangle wave by adding it to a square wave through a 741 op-amp, the problem is the offset is not constant and the triangle waveform slowly drops. See attached jpeg.
Am I doing something wrong of is there a better way of doing this rather than using a summing op-amp?
Also please see my other post in the projects forum regarding control of a H-Bridge to achieve an AC PWM or modified sine wave output.
Thanks
Im trying to add a positive and negative offset to a triangle wave by adding it to a square wave through a 741 op-amp, the problem is the offset is not constant and the triangle waveform slowly drops. See attached jpeg.
Am I doing something wrong of is there a better way of doing this rather than using a summing op-amp?
Also please see my other post in the projects forum regarding control of a H-Bridge to achieve an AC PWM or modified sine wave output.
Thanks
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