Measurement of Input/Output current

1
Measurement of Input/Output current

• for IC TTL 7400

2
circuit
3
Measure current by portable digital multi-meter
4
Made the table for both input cases 1 and 2

n Vo Io Ii1Ii2Iin
1
2
3
4
5
6
7
5
Note

• The current meter should cascade with the branch
  or element which is measured.
• You can extend the number of the gates that
  output of the gate in previous level connect such
  that the output voltage level becomes false.
  Then, you can find the fan-out of the gate.