Analog Electronics - Study Mode
[#256] In an op-amp, if the feedback voltage is reduced by connecting a voltage divider at the output, which of the following will happen? 1. Input impedance increases 2. Output impedance reduces 3. Overall gain increases
Correct Answer
(C) 3 only
[#257] The reason for using a precision OPAMP based rectifier diode for detecting weak AM signals is that
Correct Answer
(D) the cut-in voltage of the diode is reduced
[#258] Negative feedback amplifier is a . . . . . . . .
Correct Answer
(A) Degenerative feedback
[#259] In the amplifier circuit shown in the figure, the values of R 1 and R 2 are such that the transistor is operating at V CE = 3 V and I C = 1.5 mA when its β is 150. For a transistor with β of 200, the operating point (V CE , I C ) is
Correct Answer
(A) (2 V, 2 mA)
[#260] In the break region of clipping circuit, a diode behaves as
Correct Answer
(D) neither fully on nor fully off