Wednesday, April 6, 2011

SPICE Boost

Hey everybody,

I was having trouble getting a fast enough op-amp for my comparator to handle the sawtooth at 200kHz. I found an op-amp that has a good enough gbw, but the slew rate kills everything and I cant turn the MOSFET on.

Any thoughts?

danny
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2 comments:

  1. VojkanApril 7, 2011 at 8:11 AM

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  2. VojkanApril 7, 2011 at 8:16 AM

    For small signals, you can try modeling the PWM with 1/Vm gain, instead of building your comparator and a sawtooth waveform.

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