Analog Electronics
A differential amplifier is invariably used in the i/p stage of all OP-amps.This is dome basically to provide the OP-amps with a very high

Slew rate
CMRR
Bandwidth
Open-loop gain

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Analog Electronics
The magnitude of electric current ICBO

  increases with the increase in temperature.
  depends largely upon the emitter doping.
  depends largely upon emitter-base junction base potential.
  is generally greater in silicon than in germanium transistor.

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