The circuit in Figure 2.10 has two CMOS NOR gates. This circuit functions as a:

1.  flip flop

2.  Schmitt trigger

3.   Monostable multivibrator

4.  A stable multivibrator

View Answer  
4
Correct Answer :

flip flop


Explanation :
No Explanation available for this question

The transistor shunt regulator shown in the figure is has a regulated output voltage of 10V, when the input varies from 20V to 30V.The relevant parameters for the zenar diode and the transistor are:Vz=9.5,VSE=0.3V,β=99.Neglect the current through RB.Then the maximum power dissipated in the zener diode(Pz) and the transistor (PT) are

1.  Pz=75mW,PT=7.9W

2.  Pz=85mW,PT=8.9W

3.  Pz=95mW,PT=9.9W

4.  Pz=115mW,PT=11.9W

View Answer  
4
Correct Answer :

Pz=95mW,PT=9.9W


Explanation :
No Explanation available for this question

Consider the following statements in connection with the CMOS inverter in Figure2.11 where both the MOSFETs are of enhancement type and both have a threshold voltage of 2V.   Statement 1: T1 conducts when Vi ≥ 2V.   Statement 2: T1is always in saturation when V0 = 0V Which of the following is correct

1.  Only Statement 1 is TRUE

2.   Only Statement 2 is TRUE

3.  Both the statements are TRUE

4.  Both the statements are FALSE

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4
Correct Answer :

Both the statements are TRUE


Explanation :
No Explanation available for this question

If  the  input  X3,X2,X1,X0 to  the ROM  in  figure 2.12  are 8-4-2-1 BCD  numbers, then the outputs Y3 Y2 Y1 Y0 are

1.  gray code numbers

2.  2-4-2-1 BCD numbers

3.  excess 3 code numbers

4.  none of the above

View Answer  
4
Correct Answer :

2-4-2-1 BCD numbers


Explanation :
No Explanation available for this question

Consider the following assembly language program.       MVI    B,87H       MOV    A,B     START:  JMP    NEXT       MVI    B,00H       XRA    B       OUT    PORT1       HLT       NEXT:  XRA    B       JP    START       OUT    PORT2       HLT   The execution of the above program in an 8085 microprocessor will result in

1.  an output of 87H at PORT1

2.  an output of 87H at PORT2

3.   infinite looping of the program execution with accumulator data remaining at 00H

4.  infinite  looping  of  the  program  execution with  accumulator  data  alternating between 00H and 87H

View Answer  
4
Correct Answer :

an output of 87H at PORT1


Explanation :
No Explanation available for this question

The system shown in Figure 2.14 remains stable when

1.  k < - 1

2.  - 1 < k < 1

3.  1 < k < 3

4.  k > 3

View Answer  
4
Correct Answer :

- 1 < k < 1


Explanation :
No Explanation available for this question

The transfer  function of a system  is G(s)= 100/(s+1)(s+100) For a unit step  input to the system the approximate settling time for 2% criterion is

1.  100 sec

2.  4 sec

3.  1 sec

4.  0.01 sec

View Answer  
4
Correct Answer :

0.01 sec


Explanation :
No Explanation available for this question

The  characteristic  polynomial  of  a  system  is  q(S )= 2s5+s4+4s3+2s2+2s+1 The system is

1.  stable

2.  marginally stable

3.  unstable

4.  oscillatory

View Answer  
4
Correct Answer :

stable


Explanation :
No Explanation available for this question

The  system with  the  open  loop  transfer  function G(S) H(S)=1/S(s2+s+1) has a gain margin of

1.   - 6 dB

2.  0 dB

3.  3.5 dB

4.  6 dB

View Answer  
4
Correct Answer :

- 6 dB


Explanation :
No Explanation available for this question

An angle modulated signal is given by s(t)= cos 2π(2  *106t-30 sin150 -40cos150t) The maximum frequency and phase deviations of s(t) are

1.  10.5 KHz, 140π rad

2.  6 KHz, 80π rad

3.  10.5 KHz, 100π rad

4.  7.5 KHz, 100π rad

View Answer  
4
Correct Answer :

6 KHz, 80π rad


Explanation :
No Explanation available for this question
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