Microcircuit 8-th order Butterworth VLF circuit

Microcircuit Two D-type triggers 1526TM2 Microcircuit Two D-type triggers 564TM2 Microcircuit Two 4-bit binary counters 1564IE10 Microcircuit Static RAM 2Kbit (256 x 8) with I/O ports and timer M1821RU55 Microcircuit Universal synchronous-asynchronous transceiver 1821BB51AR Microcircuit 2 D-type triggers 1564TM2 Microcircuit Universal synchronous-asynchronous transceiver 1821VV51AR1 Microcircuit Two D-type triggers OS1526TM2 Microcircuit 4-digit series-parallel register OS564IR9 Microcircuit Binary-decimal decoder 564ID1 Microcircuit Programmable counter 564IE15 Microcircuit Two "2I-NE" logic elements with open-stock output OS1526LA10 Microcircuit Six "NOT" logic elements 1526LN2 Microcircuit Six logic elements "NOT" OS1256LN2 Microcircuit 4-bit serial-parallel register 564IR9 Microcircuit Four "2I-NE" logic elements OS564LA7 Microcircuit Two "2I-NE" logic elements with open-stock output 1526LA10 Microcircuit Two 4-channel formers with 3 output states with direct inverse control 1564AP4 Microcircuit 4-bit binary reversible counter 1564IE7 Microcircuit 6 logic elements "NOT" 765LN2-1 Microcircuit 8-bit serial to parallel code converter 564PR1 Microcircuit 4 logic elements "2I-NE" 1564IE7 Microcircuit Programmable timer M1821VI54 Microcircuit Four logic elements "2I-NE" 1526LA7 Microcircuit Two D-type triggers 765TM2-1 Microcircuit Six logic elements "NOT" 564LN2 Microcircuit Four "2I-NE" logic elements OS1526LA7 Microcircuit Two 4-bit shift registers 564IR2 Microcircuit 3 "3I-ILI" logic elements 764LS1-1 Microcircuit Four logic elements "2I-NE" 564LA7 Microcircuit Six high level converters (from low to high) with inversion 564PU7 JSC "NZPP with OKB" Russia Microcircuit Double 4-channel multiplexer 564KP1 Microcircuit Two 4-bit shift registers 1526IR2 Microcircuit 4-digit series-parallel register 765IR9-1 Microcircuit Digital-to-analogue converter (12-bit) 1108PA1AR1NN Microcircuit Two "4I-NE" logic elements 564LA8