Question
Download Solution PDFIn standard TTL, the 'totem pole' refers to:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFIn TTL the output stage has two transistor amplifiers (one CE and another CC) connected in a push-pull configuration to act as current sink and source at the output stage.
Totem-pole TTL Configuration:
The main advantage of TTL with a "totem-pole" output stage is the low output resistance at output logical "1",
also, the addition of an active pull up the circuit in the output of the Gate results in the reduction of propagation delay.
|
Logic Family |
Full Name |
Advantages |
Disadvantages |
|
CMOS |
Complementary metal-oxide-semiconductor |
|
Easily damaged by static discharge and voltage spikes. |
|
TTL |
Transistor-transistor logic |
|
Consumes more power than CMOS – not suitable for battery-operated devices. |
|
ECL |
Emitter-coupled logic |
Fastest available logic family |
Consumes more power than CMOS. It requires extreme care in the wiring. |
Last updated on Jun 23, 2025
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