Hi all
I have an issue I want to use a class D amplifier to drive a piezoelectric load, I am modelling this as just a resistive load of 400 ohms, (37.5W, voltage swing between +175V and -175V). Could anyone suggest what kind of filter I should use on the output, the class D FETs will be driven at a minimum frequency of 100kHz and I need a AC sinusoidal output of 1kHz? I have seen it being traditionally with an LC filter when calculating these values I got an extremely large inductance of 59mH, and wondered if anyone had any suggestion if I could use anything else that uses components of smaller magnitudes and are more accessible?
Kind Regards
Art
I have an issue I want to use a class D amplifier to drive a piezoelectric load, I am modelling this as just a resistive load of 400 ohms, (37.5W, voltage swing between +175V and -175V). Could anyone suggest what kind of filter I should use on the output, the class D FETs will be driven at a minimum frequency of 100kHz and I need a AC sinusoidal output of 1kHz? I have seen it being traditionally with an LC filter when calculating these values I got an extremely large inductance of 59mH, and wondered if anyone had any suggestion if I could use anything else that uses components of smaller magnitudes and are more accessible?
Kind Regards
Art