Buffers and Inverters Flashcards
What symbols are these?
The buffer differs from the AND, OR, and NOT functions in that a HIGH input always produces a ______ output.
The buffer differs from the AND, OR, and NOT functions in that a HIGH input always produces a HIGH output.
A LOW input also always produces a LOW output.
Buffers and inverters are digital circuits that have ___ input and ____ output.
Buffers and inverters are digital circuits that have one input and one output.
The ____ is a combination of the ____ and the ____ function. A HIGH input is LOW at the output, and a LOW input is HIGH at the output.
The inverter is a combination of the buffer and the NOT function. A HIGH input is LOW at the output, and a LOW input is HIGH at the output.
When a buffer is desired but none are available, what two configurations can be used
Two inverters can be used.
When TTL was devised, it was agreed upon by industry that logic LOWs would be defined as any voltage level ____ volts or less and logic HIGHs as _____ volts or more.
When TTL was devised, it was agreed upon by industry that logic LOWs would be defined as any voltage level 0.8 volts or less and logic HIGHs as 2 volts or more.
There’s actually some degree of variance involved based on whether we are looking at an input or output.
The voltages between ______ volts and _____volts are considered indeterminate and illegal in as much as they are not valid logic levels.
The voltages between 0.8 volts and 2 volts are considered indeterminate and illegal in as much as they are not valid logic levels.
The actual point where a TTL device switches from a LOW to a HIGH or a HIGH to a LOW is normally at roughly _____. However, to build in a margin of error, the 0.8 V and 2 V levels were established.
1.4 volts.
