This can cause excessive current flow, damaging the transistors and potentially other components in the circuit. When the output of a standard TTL gate is HIGH, it can. The problem with connecting TTL circuits with totem-pole outputs together is that if one circuit is in the high state and the other is in the low state, a direct short circuit is created between the power supply and ground through the two transistors. Correct Answer cannot, together, if the outputs are in opposite states excessively high currents can damage one or both of the devices Integrated-Circuit Logic Families problems 1. When the circuit is in the low state, the upper transistor is turned off, and the lower transistor is turned on, allowing current to flow from the load through the lower transistor to ground. This allows current to flow from the power supply through the upper transistor and into the load. When a TTL circuit with a totem-pole output is in the high state, the upper transistor is turned on, and the lower transistor is turned off. The totem-pole output stage consists of two transistors connected in series between the power supply and ground, with the output taken from the connection point between the two transistors. TTL (Transistor-Transistor Logic) circuits with totem-pole outputs are designed to provide fast switching times and low output impedance.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |