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