INSTRUCTION MANUAL
FOR
4 BIT ANALOG TO DIGITAL CONVERTER
MODEL NO. ME 731E
of 4 Bit Analog
"MARS" made 4 Bit Analog to Digital Converter has been designed to study and verify the Outputs
to Digital Converter.
The instrument comprises ofthe following built in parts
1. Two Fixed Output DC Regulated Power Supplies of 5V& 4V Dc.
DC regulated power supply of 0-5VDC.
2 One continuously variable, overload and short circuit protected
on the front panel to measure the output voltage.
3. One Digital Voltmeter (range 20 VDC ) is mounted
Converters are printed on the front panel and important connections
4. Circuit diagram for 4 Bit Analog to Digital
input& output are brought out on
sockets.
for
the front side of PCB Module.
Important components mounted
on
5
6. DConverter Techniques:
Parallel Comparator Type (Simultaneous
Type)
4 Bit V D Converter
THEORY
D CONVERTER:
PARALLEL COMPARATORA/
converted
voltage to be
converter is shown in Fig. (1). Av is the analog
A4-Bit parallel comparator A/D which the reference
voltages VR1, VR2 are
corresponding to
full scale is Vvolt from the reference voltage
by
into digital form. The voltage is compared
simultaneously with
Network. The Av voltage encoders.
Resistor
using the two 74148
generated sixteen outputs.
i.e. (0 F) - we use
there are
comparators.
Now since
using IC1 Input
lines &
7 are applied to
Hexadecimal Inputs 0 through disabled, on
encoders.
IC1 must be
encoders are
priority active (Low),
74148 of the Inputs of IC2 is connecting the
W h e n e v e r one acheived by
is
to Ic2 Input lines. be enabled. This
Input 8 through
F
HIGH then
IC1 must
required to get
the proper 4
of IC2 a r e 74157 is
all the Inputs m u l t i p l e x e r s IC is
for GS of IC1
the other hand, if line of IC1.
A 2:1
there
IC2 to the IC1
of its Inputs is active,
line of whenever o n e
EO(Enable output) low PAGE NO. 1/3 DOC 731E
of 74148 goes REV 00, DT 17 08 2010
The GS
outputs
Bit binary output.
FOR
4 BIT ANALOG TO DIGITAL CONVERTER
MODEL NO. ME 731E
of 4 Bit Analog
"MARS" made 4 Bit Analog to Digital Converter has been designed to study and verify the Outputs
to Digital Converter.
The instrument comprises ofthe following built in parts
1. Two Fixed Output DC Regulated Power Supplies of 5V& 4V Dc.
DC regulated power supply of 0-5VDC.
2 One continuously variable, overload and short circuit protected
on the front panel to measure the output voltage.
3. One Digital Voltmeter (range 20 VDC ) is mounted
Converters are printed on the front panel and important connections
4. Circuit diagram for 4 Bit Analog to Digital
input& output are brought out on
sockets.
for
the front side of PCB Module.
Important components mounted
on
5
6. DConverter Techniques:
Parallel Comparator Type (Simultaneous
Type)
4 Bit V D Converter
THEORY
D CONVERTER:
PARALLEL COMPARATORA/
converted
voltage to be
converter is shown in Fig. (1). Av is the analog
A4-Bit parallel comparator A/D which the reference
voltages VR1, VR2 are
corresponding to
full scale is Vvolt from the reference voltage
by
into digital form. The voltage is compared
simultaneously with
Network. The Av voltage encoders.
Resistor
using the two 74148
generated sixteen outputs.
i.e. (0 F) - we use
there are
comparators.
Now since
using IC1 Input
lines &
7 are applied to
Hexadecimal Inputs 0 through disabled, on
encoders.
IC1 must be
encoders are
priority active (Low),
74148 of the Inputs of IC2 is connecting the
W h e n e v e r one acheived by
is
to Ic2 Input lines. be enabled. This
Input 8 through
F
HIGH then
IC1 must
required to get
the proper 4
of IC2 a r e 74157 is
all the Inputs m u l t i p l e x e r s IC is
for GS of IC1
the other hand, if line of IC1.
A 2:1
there
IC2 to the IC1
of its Inputs is active,
line of whenever o n e
EO(Enable output) low PAGE NO. 1/3 DOC 731E
of 74148 goes REV 00, DT 17 08 2010
The GS
outputs
Bit binary output.
