(Closed Book- Version A) INSTRUCTIONS: Be sure to read each question carefully a

Question

(Closed Book- Version A) INSTRUCTIONS: Be sure to read each question carefully and completely before attempting to answer it. Do all your work on these WRITE TRUE (T) OR FALSE (F) IN THE BLANKS BELow. I point each. NO PENALTY for wrong answers. I. For the feedback amplifier shown at right (op ampis non-ideal: a) b) c) The feedback used will increase both the amplifier's input and output resistances. The feedback used is positive & series-shunt. Under feedback, the basic amplifier will behave more like an ideal current amplifier A, a) The feedback used will increase both the input and output resistances prior to feedback b) The feedback used is negative & series-shunt. )Under feedback, the basic amplifier will behave more like an ideal voltage amp Most CMOS op amps are designed to a) b) c) capacitive Hence a output stage is often necessary For low input offset voltage and input offset current and high CMRR, the two halves of the input An internally compensated op amp will NOT be stable when used as an op amp follower. In the 2-stage CMOS op amp studied, Miller was needed to place the LHP zero at eithers-or shift it into the The classical CMOS Class AB output stage suffers from reduced output signal swing that can be d) er compensation was employed, but a resistor in series with Cc was e) overcomed by replacing the source-follower (CD) output transistors with a pair of complementary devices operating in the common-source configuration. The common class A output (CC) stage dissipates its maximum power under standby qguiescent condisions a) Its input resistance depends strongly on R, but not on V b) cannot reach-9.5V if I is too small. oversi emultiplierannstetthe standbden trenta ) in ON & . The a multiplier has a large ac resistance 5 k2). The classical CMOS class AB output stage suffers from reduced output signal swing in comparison the BJ'T Class AB stage shown at right

Explanation / Answer

The answers have been put down in a numerical order as in question above

1

A.True (It is connected to the non inverting pole)

B. True ( the feedback is connected through the transistor sending current downwards and the resistance is increased subsequently)

C.FALSE( THE FEEDBACK IMPROVES THE GAIN OF THE SYSTEM)

2

A. False

B. True( it's connected to non inverting terminal)

C. True

3.

A. True

B. True

C. False (compensation can be used to increase gain and stability)

D. True

E. False

F.

D. True

The 4th question requires proper diagram

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