1 A bridgeamplifier is used to realize a high CMRR a high ma

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A bridge-amplifier is used to realize_______. a high CMRR a high maximum common-mode input voltage a high out-put voltage swing a high output resistance all of the above none of the above A V -multiplier is used for biasing______amplifier. Class A Class B Class AB Class E all of these Thermal shut-down circuit is connected to the_________of the operational amplifier. first-stage second-stage output stage from output to the input The second-breakdown in power BJTs is caused by____________. avalanche multiplication across B-C junction current-crowding in the periphery of B-E junction Zener breakdown across B-E junction melting of bond wire connecting the contact pads to package terminals A feedback amplifier with one pole is_________. unconditionally stable always unstable can be unstable depending on the amount of feedback none of these

Solution

1. (a) a high CMRR

2. (c) Class AB

3. (d) From output to the input. (The thermal shutdown indicator flag provides a current output to alert the user when thermal shutdown has occurred.)

4. (b) Current crowdind in the periphery of B-E Junction. (Secondary breakdown is a failure mode in bipolar power transistors. In a power transistor with a large junction area, under certain conditions of current and voltage, the current concentrates in a small spot of the base-emitter junction. This causes local heating, progressing into a short between collector and emitter. This often leads to the destruction of the transistor.)

5. (a) Unconditionally Stable