What is Current gain (hFE)?
The ratio of collector current to base current (IC/IB) in a bipolar transistor.
Field: Bipolar transistors
Current gain (hFE) in the explanations
hFE is the DC current gain in the common-emitter configuration, hFE = IC/IB.
Which expression gives the DC current gain hFE of a bipolar…A silicon transistor's hFE generally increases with temperature, by roughly 0.5–1% per °C.
How does the current gain hFE of a silicon bipolar transist…In the active region IC = hFE × IB, so 100 × 10 µA = 1,000 µA = 1 mA.
A transistor with DC current gain hFE = 100 has a base curr…
Questions that mention Current gain (hFE) (21)
- Which expression gives the DC current gain hFE of a bipolar transistor? (IC: collector current, IB: base current, IE: emitter current)
- What is the approximate common-emitter current gain β of a bipolar transistor whose common-base current gain α is 0.99?
- How does the current gain hFE of a silicon bipolar transistor generally change as temperature rises?
- A transistor with DC current gain hFE = 100 has a base current of 10 μA. Roughly what is the collector current in the active region?
- What is the difference between the DC current gain hFE and the small-signal current gain hfe?
- How does the current gain hFE of a bipolar transistor depend on collector current?
- What is the main reason for making the base of a bipolar transistor thin?
- When a bipolar transistor is used as a switch, which operating region corresponds to the on state?
- How does the phase of the output voltage of a common-emitter amplifier compare with the input voltage?
- What is the main reason for making the emitter of an NPN transistor more heavily doped than the base?
- Which is a characteristic of a Darlington connection of two transistors?
- Which is a characteristic of a common-collector amplifier (emitter follower)?
- Which is a characteristic of a common-base amplifier?
- What does the transition frequency fT of a bipolar transistor mean?
- What is the main reason for using a current-feedback bias circuit with an emitter resistor in a transistor amplifier?
Related terms
Emitter follower Diffusion length Punch-through Darlington connection Miller effect Transition frequency SiGe (silicon-germanium) Negative feedback Saturation region Forward bias