Topic: Electronic Devices
Which parameter of semiconductor diode exhibits positive temperature co-efficient?
- A. Reverse leakage current
- B. Reverse breakdown voltage
- C. Forward voltage
- D. None of the above
Answer: B. Reverse breakdown voltage
Explanation: In an avalanche breakdown diode (typically for breakdown voltages > 6V), the reverse breakdown voltage has a positive temperature coefficient because carrier mobility decreases at higher temperatures, requiring higher electric fields to cause avalanche multiplication. Conversely, forward voltage and Zener breakdown exhibit negative temperature coefficients.