Compound semiconductors

What is a high-frequency IC called that integrates transistors together with passive components such as inductors and capacitors on a substrate such as GaAs?

  1. ADRAM
  2. BMEMS
  3. CMMIC (monolithic microwave integrated circuit)
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Answer: C. MMIC (monolithic microwave integrated circuit)

An MMIC (monolithic microwave integrated circuit) integrates high-frequency transistors with inductors, capacitors and transmission lines for matching networks on a single substrate. Semi-insulating GaAs substrates have low high-frequency loss and are used for MMICs such as mobile phone power amplifiers and radar.

  • A. DRAM is a memory IC.
  • B. MEMS are devices with tiny mechanical structures.
  • C. Correct. It is an integrated circuit for high frequencies.
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More Compound semiconductors questions

  1. What is the empirical rule called that says the lattice constant of an alloy semiconductor such as AlGaAs varies almost linearly with composition?
  2. Which configuration combines a normally-on GaN HEMT in series with a low-voltage silicon MOSFET so it can be used safely with normally-off behavior?
  3. When a strong field is applied to GaAs, electrons transfer to another valley with lower mobility, and negative differential resistance appears in which current decreases as the field rises. Which oscillator device uses this?
  4. What is the problem called in which LED external quantum efficiency is high for blue (InGaN) and red (AlGaInP) but low in the green-to-yellow range between them?
  5. Which correctly describes a "type I" band alignment at a heterojunction?