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Digital Electronics - Logic Families and Their Characteristics

Exercise : Logic Families and Their Characteristics - General Questions
16.
Which of the following summarizes the important features of emitter-coupled logic (ECL)?
low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption
good noise immunity, negative logic, high-frequency capability, low power dissipation, and short propagation time
low propagation time, high-frequency response, low power consumption, and high output voltage swings
poor noise immunity, positive supply voltage operation, good low-frequency operation, and low power
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Why is a pull-up resistor needed for an open collector gate?
to provide Vcc for the IC
to provide ground for the IC
to provide the HIGH voltage
to provide the LOW voltage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Why is a pull-up resistor needed when connecting TTL logic to CMOS logic?
to increase the output LOW voltage
to decrease the output LOW voltage
to increase the output HIGH voltage
to decrease the output HIGH voltage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The word "interfacing" as applied to digital electronics usually means:
a conditioning circuit connected between a standard TTL NAND gate and a standard TTL OR gate
a circuit connected between the driver and load to condition a signal so that it is compatible with the load
any gate that is a TTL operational amplifier designed to condition signals between NMOS transistors
any TTL circuit that is an input buffer stage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The rise time (tr) is the time it takes for a pulse to rise from its ________ point up to its ________ point. The fall time (tf) is the length of time it takes to fall from the ________ to the ________ point.
10%, 90%, 90%, 10%
90%, 10%, 10%, 90%
20%, 80%, 80%, 20%
10%, 70.7%, 70.7%, 10%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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