What is Early effect?
A phenomenon in which raising the collector voltage widens the base-collector depletion layer, narrowing the effective base width and slightly increasing collector current.
Field: Bipolar transistors
Early effect in the explanations
The minority-carrier gradient steepens and collector current rises slightly—the Early effect.
Which correctly describes the Early effect in a bipolar tra…Errors from base current and limited output resistance from the Early effect are improved by Wilson or cascode mirrors.
Which circuit uses two matched transistors to make the curr…Their slight upward slope is the Early effect, and the inverse of the slope is the output resistance ro.
When the output characteristics (IC-VCE) of a common-emitte…
Questions that mention Early effect (4)
- Which correctly describes the Early effect in a bipolar transistor?
- Which circuit uses two matched transistors to make the current in one transistor equal to the current in the other?
- When the output characteristics (IC-VCE) of a common-emitter transistor are plotted with base current IB as a parameter, what is characteristic of the active region?
- Which model represents the large-signal behavior of a bipolar transistor with two diodes and current sources?
Related terms
Current mirror Current gain (hFE) SPICE Common-emitter circuit Crossover distortion Cutoff region Darlington connection Emitter follower Forward-active region HBT (heterojunction bipolar transistor)