Electronic Work Bench (EWB)

1. Electronic WorkBench (EWB)
Zahra Sadeghi

2. Electronic WorkBench(EWB)

3. Starting Workbench
• Drawing Area
• workbench area where
the circuit is assembled.
It cannot be closed.
• Description Window
• This is a text area which allows
descriptions to be attached to the
circuit design. Any text entered into this
area will be saved with the design. This window is normally closed.
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Description Window
Drawing area
Pulldown Menus
Equipment Shelf
PartsBin
Simulation
T imeParts Bin Store

4. Logic converter
It can be attached to a circuit to
• derive the truth table
• boolean expression the circuit embodies
• to produce a circuit from a truth table or boolean expression.

5. Deriving a Truth Table from a Circuit
• 1. Attach the input terminals of the logic converter to up to eight input
points in the circuit.
• 2. Connect the single output of the circuit to the output terminal on the
logic converter icon.
• 3. Click the Circuit to Truth Table button.
• The truth table for the circuit appears in the logic converter's display.

6. Entering and Converting a Truth Table Using the
Logic Converter
To construct a truth table:
1. Click the number of input channels you want, from A to H,
across the top of the logic converter.
• The display area below the terminals fills up with the necessary
combinations of ones and zeros to fulfill the input conditions.
The values in the output column on the right are initially set to
0.
2. Edit the output column to specify the desired output for each
input condition.

7. • To change an output value
select it and type a new value:
1, 0 or x
• To convert a truth table to a
Boolean expression:
• The Boolean expression will be displayed
at the bottom of the logic converter.
• To convert a truth table to a simplified Boolean
expression:
• The simplification is performed by the Quine-McCluskey method, rather than the
more familiar Karnaugh mapping technique.
• To convert a Boolean expression to a circuit
• To see a circuit that fulfills the conditions of the
Boolean expression using only NAND gates

8. Example of logic converter

9. WORD GENERATOR

10. Entering Words in Word Generator
• left side: rows of 4-character hexadecimal numbers.
• range :from 0000 to FFFF(0 to 65535, in decimal).
Each horizontal row =a binary 16-bit word.
• When the word generator is activated, a row
of bits is sent in parallel to the corresponding
terminals at the bottom of the instrument.
• As the words are transmitted by the word generator,
the value of each bit appears in the circles
representing the output terminals at the bottom of the
instrument.

11. patterrn

12. Word generator
sends digital words or patterns
of bits into circuits.
inject the 16-bit words intoa circuit:
1.Step:To transmit one word
at a time into the circuit.
2. Burst:To send all words in
sequence.
3. Cycle: sends a continuous
stream of words that can be
stopped by clicking Cycle again,
or by pressing CTRL+T.
4.Breakpoint: to pause and restart the stream of words at a
specified word.

13. example

14. Logic analyzer
• Data is displayed as square waves over time
• The binary value of each bit in the current
word is displayed in the terminals on the left side
of the instrument face.

15. example

16. 8 bit adder

17. Logic analyzer
• The logic analyzer displays the levels of up to 16 digital signals
in a circuit
• To clear the logic analyzer's display, click Reset.
• To dump stored data when the logic analyzer is not triggered,
click Stop. If the logic analyzer is already triggered and
displaying data, Stop has no effec

18. Multimeter
• Use the multimeter
to measure AC or
DC voltage or current,
resistance between two
points in a circuit.
• Measures V, A, W,
dB , d.c., a.c.

19. Function generator
• is a voltage source that
supplies sine, triangular or
square waves.
A realistic way to supply power
to a circuit.
• The positive terminal
(+) provides a waveform
in the positive direction
from the neutral common terminal. The negative terminal (-)
provides a waveform in the negative direction.