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Question 332

How is power supplied to the most common type of MMIC?

  1. Through a capacitor and RF choke connected to the amplifier input lead
  2. MMICs require no operating bias
  3. Through a resistor and/or RF choke connected to the amplifier output leadCorrect answer
  4. Directly to the bias voltage (Vcc) lead

Explanation

The common three-lead MMIC has no separate supply pin, so DC is fed onto its output lead through a bias resistor and an RF choke while a series blocking capacitor keeps that DC out of the following stage. Such devices do need bias, and it is applied neither at the input nor through a dedicated supply lead.

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Question 332: How is power supplied to the most common type of MMIC? · FCC Amateur Extra Class (Element 4) · Questena