Topic: Electronic Devices
Operating Frequency limitation for Bipolar semi-conductor device is due to
- A. Junction Parasitic
- B. Electron Mobility
- C. both (a) and (b)
- D. None of above
Answer: C. both (a) and (b)
Explanation: The high-frequency performance of a Bipolar Junction Transistor (BJT) is limited by its junction parasitic capacitances (which cause RC time constant delays) as well as the transit time of minority charge carriers crossing the base region, which is dictated by electron/hole mobility.