In an n-channel JFET, what is the doping type of the gate region that controls channel conduction?

Introduction / Context:
JFETs (junction field-effect transistors) operate by reverse-biasing a p–n junction between the gate and the channel. Recognizing which region is doped as p or n helps understand pinch-off, VGS control, and device fabrication.

Given Data / Assumptions:

• Device type: n-channel JFET.
• Channel: n-type semiconductor providing electron conduction.
• Gate: forms a p–n junction with the channel.

Concept / Approach:
To form a controllable depletion region around the channel, the gate must be p-type. Applying reverse bias between gate and channel widens the depletion region, reducing channel width until cutoff (pinch-off) occurs.

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