Unformatted text preview: Exercise Procedure E] 4. a)Connect the circuit shown in Fig. 212.
[:1 b) Turn on the trainer power. [:1 0) Complete Table 27. Table 27 The truth table should indicate the operation
of an OR gate; that if any input is 1 the out
put is 1. OUTPUT Fig. 212 5. a)Connect the circuit shown in Fig. 213. El
El b) Turn on the trainer power.
Cl 0) Complete Table 28. Table 28 The truth table should indicate the operation of
an AND gate; that the output is 1 if and only if
all the inputs are 1. AND/OR Logic Gates; NOT Circuit 25 Summary In this lesson you have been introduced to the
digital logic AND gate, its logic symbol and
truth table. You have verified that positive logic
is used, with the most positive level (which
lights the lamp) being a HI and a logic 1. You
demonstrated and verified that all inputs of the
AND gate must be 1 to obtain a 1 at the output.
For all other input combinations of this gate,
the output will be 0. The 1 and 0 states dem
onstrate the binary nature of digital logic. You were then introduced to the digital logic
OR gate, its logic symbol and truth table. You
verified that if any input of the OR gate is 1
then the output will be 1. Only if all inputs to
the OR gate are zero, will the output be 0. You were finally introduced to the INVERTER
and demonstrated that the output will be the
inverse or complement of the input. You verified
that if the input was A and A was 1 then the
output was 0 or X. You then combined circuits and verified that by
inverting the inputs and outputs of the AND
gate you could obtain the OR function. You
further verified that inverting the inputs and
outputs of an OR gate gave the results of the
AND gate. The truth table was an aid to check
your results. Quiz 1. An AND gate with a 1 on every input will
have an output of: a”; 0.
(1,; 1
6. L0. d. None of the above. 2. An OR gate with a 1 on at least one input,
will have an output of: a. 0.
b. 1.
c. LO. (1. None of the above. 3.. An INVERTER with a 1 at its input, will
have an output of: a. 0.
b. 1.
0. HI.
d. None of the above. ...
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 Fall '05
 Myer,B

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