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Tag Archives: filter

Graph filters

Monday, January 16, 2012

I've put together two graph filters that can be applied to the VD. The first one detects the interior or exterior of a polygon. When the VD is constructed the polygon boundary must be input in CW order, and any islands inside the polygon in CCW order (or vice versa). This allows running other downstream [...]

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8-channel 4th-order 60 kHz anti-alias low-pass filter

Saturday, April 26, 2008

I used this Sallen-Key design to build an 8-channel 4th order low-pass anti-alias filter for a 16-bit 200 kS/s +/- 10 V AD-Converter. I calculated the components for the 60 kHz low-pass Butterworth design with this on-line calculator. Previously I've used the MAX274, but that component is limited to +/- 5 V signals. Here I [...]

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