Electronic Circuits

81. Logic analyzer is used to

1. Verify the logic operation of the gates in a circuit
2. To display the fall time
3. To sample and display systems signal
4. To analyze the logic operation of the system

View answer

82. Low efficiency of a power amplifier results in

1. Low forward bias
2. Less battery consumption
3. More battery consumption
4. Low power output

View answer

83. Minimum interference with frequency response can be given by

1. Direct coupling
2. RC coupling
3. Transformer coupling
4. Instrumentation and control

View answer

84. Negative feedback is employed in

1. Oscillators
2. Rectifiers
3. Amplifiers
4. Receivers

View answer

85. One of the items below is a characteristic of cascaded amplifiers?

1. Doubles transconductance
2. Total gain is lessen
3. Increased overall gain
4. Increased overall amplification ratio

View answer

86. Oscillators operate on the principle of

1. Positive feedback
2. Negative feedback
3. Signal feedthrough
4. Attenuation

View answer

87. Parasitic oscillations are caused by

1. Output negative feedback
2. Push-pull operation
3. Poor interstage coupling
4. Transistor interelectrode capacitance

View answer

88. Power amplifiers generally use transformer coupling because transformer coupling provides

1. Cooling of the circuit
2. Distortionless output
3. Impedance matching
4. Good frequency response

View answer

89. Power amplifiers handle _________ signals.

1. Very small
2. Small
3. Large
4. Very large

View answer

90. Practically, the voltage gain of an amplifier is expressed

1. In volts unit
2. In dB unit
3. As an absolute value
4. As a whole number

View answer