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Block diagram - Gamma Cardio Soft
4 RLDE 3 Right Leg Drive (4) RLDout Cable_gnd Lead_selector (3) buffer_v1_C Preamplifier (4) V1 toRLD out V1E buffer_v2 In out V2E LeadOut+ Lead+ Sat_Test LeadOut- LeadtoAmplifier Amplifier (4) In V3E V2 V3 V4 V5 buffer_v3 In Out buffer_v4 1 All the schematics are contained in the book: "Medical Instrument Design and Development", Becchetti, Neri, John Wiley & Sons Ltd. RLDIn Cable_GND D 2 Low Pass Filter (5) AmplifierIn toFilters FiltersIn VRefLow out V4E In Cal buffer_v5_C V5E buffer_v6 In Control1.C Control1.B Control1.A out V6E In Calibration Voltage reference VRefLow C Test Voltage reference (3) RA_ON LA_ON LL_ON CAL_ON out Control2.A Control2.B Control2.C C V6 RA LA LL D toDCelev 5 RAE In out out LAE Controller ADC (6) In B Control1.C Control1.B Control2.A Control1.A Control2.B Control2.C buffer_LL out In Circuit_Protection (1) Buffer (2) J2 A 5 V2E V3E V4E V5E V6E Cable_GND RAE LAE LLE V1E RLDE 232-RX 232-TX UsbGND UsbD+ 232-RXD UsbDVUsb+ 232-TX RB7 RB6 VPP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PC->USB, Isolation (8), Power (9) PC->USB USB FB2 B PC USB Connection 120R 600R 600R 120R FB3 FB4 FB5 UsbShield 4 3 2 1 J1 Shield case CAL_ON RA_ON LL_ON LA_ON Patient Cable DSUB 15 female ADC Input In 5 LLE to_HP Sat_Test PIC (7) buffer_LA Test buffer_RA FB6 600R USB-FEMALE-B 4 3 2 1 Title CG ECG: Main scheme Size A Date: Document Number Rev Gamma Cardio Soft all rights reserved 30.2 Saturday, August 18, 2012 4 Sheet 3 of 3 0 19 2 A J3 Programming Plug 1