Compound semiconductors

Which is an example of an application of HBTs (heterojunction bipolar transistors) made from InP or GaAs?

  1. ADRAM memory cells
  2. BHigh-speed, high-frequency circuits for optical and wireless communication
  3. CGenerating power from solar heat
Show answer and explanation

Answer: B. High-speed, high-frequency circuits for optical and wireless communication

Compound semiconductor HBTs have high electron mobility, and their heterojunctions allow structures suited to high-speed operation, so they are used in transmit power amplifiers for mobile phones and in high-speed electronic circuits for optical communication.

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