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-> CV Alternative: CV from something else VCF MK's Diode Ladder VCF 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 BGA-153 M153 MBGA Altera UBGA U324 BGA-324 BGA-624, 25x25 grid, 21x21mm package, pitch 0.8mm; http://ww1.microchip.com/downloads/en/PackagingSpec/00000049BQ.pdf#p495 TFBGA-216, 15x15 raster, 13x13mm package, pitch 0.4mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32l152zc.pdf WLCSP-64, 8x8 raster, 3.347x3.585mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32l152zd.pdf WLCSP-64, 8x8 raster, 4.539x4.911mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f303zd.pdf WLCSP-100, 10x10 raster, 4.201x4.663mm package, pitch 0.8mm Altera BGA-68 M68 MBGA Altera BGA-153 M153 MBGA Altera BGA-153 M153 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 U324 BGA-324 BGA-624, 25x25 grid, 21x21mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f103tb.pdf UFBGA-132, 12x12 raster, 7x7mm package, pitch 0.5mm; see section 7.1.1 of http://www.st.com/resource/en/datasheet/stm32f401ce.pdf WLCSP-49, 7x7 raster, 2.965x2.965mm package, pitch 0.5mm UFBGA-64, 8x8 raster, 4.539x4.911mm package, pitch 0.8mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32f429ng.pdf UFBGA-201, 15x15 raster, 10x10mm package, pitch 0.4mm; see section 7.1 of http://www.st.com/resource/en/datasheet/DM00282249.pdf WLCSP-90, 10x9 raster, 4.223x3.969mm package, pitch 0.65mm UFBGA-32, 6x6, 4x4mm package, pitch 0.8mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32f071v8.pdf WLCSP-63, 7x9 raster, 3.228x4.164mm package, pitch 0.35mm; https://datasheets.maximintegrated.com/en/ds/MAX40200.pdf WLP-9, 1.448x1.468mm, 9 Ball, 3x3 Layout, 0.4mm Pitch, https://pdfserv.maximintegrated.com/package_dwgs/21-100489.PDF WLCSP-25, 5x5 raster, 2.097x2.493mm package, pitch 0.4mm; see section 7.1.1 of http://www.st.com/resource/en/datasheet/stm32f401ce.pdf WLCSP-49, 7x7 raster, 3.294x3.258mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32l152zc.pdf UFBGA 132 Pins, 0.5mm Pitch, http://www.ti.com/lit/ds/symlink/tps63000.pdf 3x3mm Body, 0.65mm Pitch, S-PVSON-N8, http://www.ti.com/lit/ds/symlink/opa2333.pdf 3x3mm Body, 0.5mm Pitch, https://www.st.com/resource/en/datasheet/stm32mp151a.pdf ST TFBGA-225, 13.0x13.0mm, 225 Ball, 15x15 Layout, 0.8mm Pitch, https://www.st.com/resource/en/datasheet/stm32h7b3ri.pdf ST TFBGA-257, 10.0x10.0mm, 257 Ball, 19x19 Layout, 0.8mm Pitch, https://www.st.com/resource/en/datasheet/stm32mp151a.pdf ST UFBGA-73, 5.0x5.0mm, 73 Ball, 9x9 Layout, 0.5mm Pitch, WSON-8, http://www.ti.com/lit/ds/symlink/lm27761.pdf WSON 8 1EP ThermalVias WSON, 8 Pin (https://ams.com/documents/20143/36005/AS7341_DS000504_3-00.pdf/#page=63.

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