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BackVCF Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on http://www.latticesemi.com/view_document?document_id=213 BGA 0.8mm 9mm 121 BGA-132 11x17 12x18mm 1.0pitch Altera BGA-144 M144 MBGA Altera VBGA V81 BGA-81 Altera BGA-100 M100 MBGA 121-ball, 0.8mm BGA (based on http://www.latticesemi.com/view_document?document_id=213 BGA 0.8mm 9mm 121 BGA-132 11x17 12x18mm 1.0pitch Altera BGA-144 M144 MBGA Altera UBGA U169 BGA-169 BGA-200, 14.5x10.0mm, 200 Ball, 12x22 Layout, 0.8x0.65mm Pitch, http://www.issi.com/WW/pdf/43-46LQ32256A-AL.pdf Altera BGA-256 M256 MBGA BGA-256, dimensions: https://www.xilinx.com/support/documentation/package_specs/ft256.pdf, design rules: https://www.xilinx.com/support/documentation/user_guides/ug1099-bga-device-design-rules.pdf Altera UBGA U169 BGA-169 BGA-200, 14.5x10.0mm, 200 Ball, 12x22 Layout, 0.8x0.65mm Pitch, http://www.issi.com/WW/pdf/43-46LQ32256A-AL.pdf Altera BGA-256 M256 MBGA BGA-256, dimensions: https://www.xilinx.com/support/documentation/package_specs/ft256.pdf, design rules: https://www.xilinx.com/support/documentation/user_guides/ug1099-bga-device-design-rules.pdf Altera UBGA U169 BGA-169 BGA-200, 14.5x10.0mm, 200 Ball, 12x22 Layout, 0.8x0.65mm Pitch, http://www.issi.com/WW/pdf/43-46LQ32256A-AL.pdf Altera BGA-256 M256 MBGA BGA-256, dimensions: https://www.xilinx.com/support/documentation/package_specs/ft256.pdf, design rules: https://www.xilinx.com/support/documentation/user_guides/ug1099-bga-device-design-rules.pdf Altera UBGA U324 BGA-324 BGA-624, 25x25 grid, 21x21mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f746zg.pdf TFBGA-265, 17x17 raster, 14x14mm package, pitch 0.65mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32f302vc.pdf WLCSP-100, 10x10 raster, 10x10mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f303zd.pdf WLCSP-100, 10x10 raster, 8x8mm package, 0.5mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=260, NSMD pad definition Appendix A BGA 676 1 FG676 FGG676 Spartan-7 BGA, 14x14 grid, 8x8mm package, pitch 0.4mm; see section 6.2 of http://www.st.com/resource/en/datasheet/stm32f746zg.pdf TFBGA-265, 17x17 raster, 14x14mm package, pitch 0.4mm; see section 7.1 of http://www.st.com/resource/en/datasheet/stm32f411vc.pdf WLCSP-49, 7x7 raster, 3.89x3.74mm package, pitch 0.4mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32l151cc.pdf WLCSP-64, 8x8 raster, 3.141x3.127mm package, pitch 0.5mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32l152zc.pdf UFBGA 132 Pins, 0.5mm Pitch, https://www.ti.com/lit/ds/symlink/dac80508.pdf Analog LFCSP, 16 pin, 4x4mm, 2.1mm sq pad (http://www.analog.com/media/en/technical-documentation/data-sheets/ADG633.pdf LFCSP, 16 Pin (https://www.st.com/resource/en/datasheet/stp08cp05.pdf#page=20), generated with kicad-footprint-generator Soldered wire connection, for 6 times 2.5 mm² wire, basic insulation, conductor diameter 0.5mm, outer diameter 1mm, size source Multi-Contact FLEXI-xV 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 0.75 mm² wires, reinforced insulation, conductor diameter 1.4mm, outer diameter 4.4mm, size source Multi-Contact FLEXI-2V 0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex CLIK-Mate series connector, B09B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator.
- Pots mounted flush to the PSU.
- 2.010256e-01 vertex -1.052128e+02 9.725134e+01 1.101732e+01 facet normal 0.00743619.
- 0.0991953 facet normal 0.992165 0.101034 0.0734901 vertex.