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Friday, February 18, 2011

Define fan out. Which factor is responsible for the limit of fan out in TTL circuits.

Define fan out. Which factor is responsible for the limit of fan out in TTL circuits.

Fan out. It specifies the number of standard loads that the output of the gate can drive without impairment of its normal operation. A standard load is defined as the current flowing in the input of a gate in the same I family.
The fan out in TTL circuits is limited by the amount of current that output transistor can sink when it is in saturation.

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