Analog Electronics
Depending upon the switching recovery time and on state drop, the power diodes are types

 General purpose, fast recovery.
 Fast recovery, Schottky.
 None of these.
  General purpose, fast recovery and schottly.

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Analog Electronics
The typical input stage of an opamp has a

  differential input and differential output.
  single - ended input and single-ended output.
  single - ended input and differential output.
  differential input and single - ended output.

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