Diode Ladder Filter Schematic. Here s yves schematic click here to download a larger version. The schematic at right shows a simplified diode string filter.
The upright on the right connects to pin 3 of the lm13700. Diode ladder filters emerged partly as a way of circumventing moog s patent on the much loved transistor ladder design. Schematic vcf6c diode ladder modification is in red click on image to download full sized version the vcf6c has no adjustment for cv scaling but this is easily corrected in the same manner as for the arp 4072 filter.
Schematic vcf6c diode ladder modification is in red click on image to download full sized version the vcf6c has no adjustment for cv scaling but this is easily corrected in the same manner as for the arp 4072 filter.
Look at the physical ladder with the capacitors pointing up at you. However other differences in how the circuit is made namely swapping moog s transistor based design for a diode based circuit make this a different beast entirely a perfect filter for the type of squelchy basslines so often played on the tb 303. Four ota stages with ca3080 and ca3140 as buffer schematic. To limit the current in the diodes we need to use some resistance r2.
