GATE ECE 2007 | Logic Families Question 6 | Digital Circuits

GATE ECE 2007

MCQ (Single Correct Answer)

-0.6

The circuit diagram of a standard TTL NOT gate is shown in the figure. When $${V_i}$$= 2.5V, the modes of operation of the transistors will be: GATE ECE 2007 Digital Circuits - Logic Families Question 2 English

GATE ECE 2007 Digital Circuits - Logic Families Question 2 English

$${Q_1}$$ :reverse active

$${Q_2}$$; normal active

$${Q_3}$$; :saturation;

$${Q_4}$$ :cut-off

$${Q_1}$$ :reverse active

$${Q_2}$$: saturation

$${Q_3}$$: saturation

$${Q_4}$$ : cut-off

$${Q_1}$$ : normal active

$${Q_2}$$; cut-off

$${Q_3}$$; cut-off

$${Q_4}$$ : saturation

$${Q_1}$$ : :saturation

$${Q_2}$$: :saturation

$${Q_3}$$ :saturation

$${Q_4}$$ : normal active

GATE ECE 2003

MCQ (Single Correct Answer)

-0.6

The DTL, TTL, ECL and CMOS families of digital ICs are compared in the following 4 columns GATE ECE 2003 Digital Circuits - Logic Families Question 4 English

GATE ECE 2003 Digital Circuits - Logic Families Question 4 English

GATE ECE 1994

True or False

-0

In the output stage of a standard TTL, we have a diode between the emitter of the pull up transistor and the collector of the pull-down transistor. The purpose of this diode is to isolate the output node from the power supply $${V_{cc}}$$.

TRUE

FALSE

GATE ECE 1987

MCQ (Single Correct Answer)

-0.6

Given that for a logic family,

$${V_{OH}}$$ is the minimum output high-level voltage
$${V_{OL}}$$ is the minimum output low-level voltage
$${V_{IH}}$$ is the minimum output high-level voltage and
$${V_{IL}}$$ is the minimum output low-level voltage.
The correct relationship is:

$${V_{IH}}$$ >$${V_{OH}}$$ >$${V_{IL}}$$ >$${V_{OL}}$$

$${V_{OH}}$$ > $${V_{IH}}$$> $${V_{IL}}$$ >$${V_{OL}}$$

$${V_{IH}}$$>$${V_{OH}}$$ >$${V_{OL}}$$ >$${V_{IL}}$$

$${V_{OH}}$$ > $${V_{IH}}$$>$${V_{OL}}$$ >$${V_{IL}}$$