Digital Electronics Test 10
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Instruction:
Total number of questions : 20 .
Time alloted : 30 minutes.
Each question carry 1 mark, no negative marks.
1.
If a typical PC uses a 20-bit address code, how much memory can the CPU address?
2.
Fan-out is specified in terms of ________.
3.
Which of the following is true for a 5-variable Karnaugh map?
4.
One reason for using the sum-of-products form is that it can be implemented using all ________ gates without much difficulty.
5.
A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states?
6.
The duty cycle of the most significant bit from a 4-bit (0–9) BCD counter is ________.
7.
To which pin on the RAM chip does the address decoder connect in order to signal which memory chip is being accessed?
8.
What is another name for digital circuitry called sequential logic?
9.
A GAL is a programmable/reprogrammable PAL.
10.
Which type of programming is typically used for digital signal processors?
11.
An offset error in a DAC will show up as an incorrect analog output ________.
12.
A certain gate draws 1.8 CC is 5 V and the gate is operated on a 50% duty cycle. What is the average power dissipation (PD )?
13.
CMOS is a more dominant IC technology than TTL.
15.
The 2's-complement system is to be used to add the signed binary numbers 11110010 and 11110011. Determine, in decimal, the sign and value of each number and their sum.
16.
CMOS stands for "complementary metal-oxide semiconductors" and the FETs are normally enhancement mode devices.
17.
In an HDL application of a stepper motor, after an up/down counter is built what is done next?
18.
On a binary-weighted D/A converter the least significant binary input ________.
19.
When two or more inputs are active simultaneously, the process is called:
20.
The number of data registers is:
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A when its output is HIGH and 3.3 µA when its output is LOW. VCC is 5 V and the gate is operated on a 50% duty cycle. What is the average power dissipation (PD)?
resistor