# If the differential voltage gain and the common mode voltage gain of a differential amplifier are 48 dB and 2 dB respectively, then its common mode rejection ratio is

1.  23 dB

2.  25 dB

3.  46 dB

4.  50 dB

4

46 dB

Explanation :
No Explanation available for this question

# Generally, the gain of a transistor amplifier falls at high frequencies due to the

1.  internal capacitances of the device

2.  coupling capacitor at the input

3.  skin effect

4.  coupling capacitor at the output

4

internal capacitances of the device

Explanation :
No Explanation available for this question

# The number of distinct Boolean expression of 4 variables is

1.  16

2.  256

3.  1024

4.  65536

4

65536

Explanation :
No Explanation available for this question

# The minimum number of comparators required to build an 8 bit flash ADC is

1.  8

2.  63

3.  255

4.  256

4

255

Explanation :
No Explanation available for this question

# The output of the 74 series of TTL gates is taken from a BJT in

1.  totem pole and common collector configuration

2.  either totem pole or open collector configuration

3.  common base configuration

4.   common collector configuration

4

either totem pole or open collector configuration

Explanation :
No Explanation available for this question

# Without any additional circuitry, an 8 : 1 MUX can be used to obtain

1.  some but not all Boolean functions of 3 variables

2.  all function of 3 variables but none of 4 variables

3.  all functions of 3 variables and some but not all of 4 variables

4.  all functions of 4 variables

4

all function of 3 variables but none of 4 variables

Explanation :
No Explanation available for this question

# A 0  to 6 counter consists of 3  flip  flops and a combination circuit of 2  input gate(s). The combination circuit consists of

1.  one AND gate

2.  one OR gate

3.  one AND gate and one OR gate

4.  two AND gates

4

two AND gates

Explanation :
No Explanation available for this question

# The  Fourier  series  expansion  of  a  real  periodic  signal with  fundamental  frequency  f0  is given by It is given that c3 = 3 + j5. Then c-3 is

1.  5 + j3

2.  - 3 - j5

3.  - 5 + j3

4.  3 - j5

4

3 - j5

Explanation :
No Explanation available for this question

# Let x(t) be the input to a linear, time-invariant system. The required output is 4x (t - 2). The transfer function of the system should be

1.  4 ej4πf

2.  2 e-j8πf

3.  4 e-j4πf

4.  2 ej8πf

4

4 e-j4πf

Explanation :
No Explanation available for this question

1.  -6

2.  zero

3.   2

4.  -4

4