Curioustab

Home » Digital Electronics » Digital Design

The output of a standard TTL NAND gate is used to pull an LED indicator LOW. The LED is in series with a 470-Ω resistor. What is the current in the circuit when the LED is on?

7.02 mA
8.51 mA
10.63 mA
5.32 mA

Correct Answer: 7.02 mA

← Previous Question Next Question→

More Questions from Digital Design

One example for the use of a Schmitt trigger is as a(n):
When the inputs to a flip-flop are changing at the same time that the active trigger edge of the input clock is making its transition, this condition is called:
A series RC circuit can be used to generate a power-up (automatic) reset signal.
A Schmitt trigger has a positive feedback circuit and experiences a phenomenon called hysteresis.
TTL requires a constant supply voltage of 8.0 V.
Pull-up resistors and pull-down resistors are used to keep a floating terminal HIGH.
The output of a phototransister is determined by the presence or absence of light at its base input.
The term race condition describes the time that an active signal must be present at the input to a flip-flop before an active clock edge is applied.
A transfer function graph illustrates the most important specifications for the Schmitt trigger devices.
There is no way to eliminate the effects of a switch bounce.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion