Amplifiers

Explanation of question 11

Two matched transistors are connected as a complementary pair. The two transistors must be

  1. one pnp and one npn
  2. both pnp
  3. both npn
  4. supplied via a transformer

The answer is :- 1 Must have a pnp and an npn — hence ‘complementary’. (sometimes called a transformerless output stage).

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