A switched capacitor lowpass filter IC can filter out the harmonics from a triangle-wave or square-wave and its clock frequency contols its cutoff frequency.
National Semi used to make some good ones but not anymore. Maxim have some.
It would take somebody a few years to make one from scratch.
National Semi used to make some good ones but not anymore. Maxim have some.
It would take somebody a few years to make one from scratch.
